Audiovisual System Design: NICE PIK 2

Building Wide AV over IP | Hybrid Meeting Solutions | Intuitive Centralized Control

NICE (Nusantara International Convention Exhibition) PIK2 is Indonesia’s largest and most modern MICE (Meetings, Incentives, Conventions, and Exhibitions) venue. Located in the Pantai Indah Kapuk 2 business district, it spans over 40 hectares and offers 130,000 m² of event space, positioning itself as a premier destination for global events.

The development of NICE PIK 2 required a scalable and integrated audiovisual (AV) infrastructure capable of supporting diverse operational scenarios, including public information dissemination, branding activation, and hybrid collaboration environments.

Challenges

The complexity of the site comprising mixed-use public spaces, commercial areas, and event-driven zones necessitated a unified system architecture that balances performance, flexibility, and ease of operation.

Building Wide Audiovisual

Herwin Gunawan and ALTA Integra AV consultant team designed a building-wide audiovisual system was therefore conceived to enable consistent and synchronized delivery of digital content across multiple zones. This system supports dynamic information display and branding strategies, ensuring that visual and audio messaging can be distributed, scheduled, and adapted in real time while maintaining spatial coherence and signal integrity.

Audiovisual over Internet Protocol

At the core of the infrastructure is an AV over IP architecture, which replaces traditional matrix-based analogue audiovisual signal routing with a network-centric approach. This allows for scalable media distribution, flexible routing, and simplified system expansion.

By leveraging standard network protocols, the system enhances interoperability, reduces cabling complexity, and enables centralized management of audiovisual resources across the development.

Hybrid Audiovisual Meeting

To accommodate evolving workplace and event requirements, the design integrates hybrid audiovisual meeting capabilities, enabling seamless interaction between physical and remote participants. The system supports high-quality audio capture, speech intelligibility, and low-latency video transmission, ensuring effective communication across distributed environments.

Operational Excellent

Operational efficiency is achieved through an intuitive centralized control system, designed to abstract technical complexity from end users. A unified control interface enables operators to manage multiple AV subsystems—including audio distribution, visual displays, and meeting environments—through simplified workflows and pre-configured scenarios. This approach minimizes training requirements while ensuring reliable and consistent system performance.

Overall, the audiovisual design at NICE PIK 2 establishes a robust digital backbone that seamlessly integrates technology with the built environment—supporting communication, engagement, and user experience at both architectural and operational levels.

Project Information

• Project: Nusantara International Convention Exhibition (NICE) PIK2

• Location: Jakarta, Indonesia

• Service: Audiovisual System Design

• Scope: Building Wide AV over IP, Hybrid Meeting System

• AV Consultant: Herwin Gunawan - ALTA Integra

• Year: 2025

Architectural Facade Lighting Design for Plaza Mandiri Jakarta

How We Translated Design Vision into Measurable and Performance-Based Facade Lighting for Plaza Mandiri (Now Wisma Danantara Jakarta)

For us, facade lighting design is not merely about making a building look beautiful at night. It is an instrument for shaping corporate identity, defining urban presence, and communicating the role of the building within the city after dark.

In the Plaza Mandiri project — now known as Wisma Danantara — the lighting design approach was developed from the corporate identity itself and translated into measurable architectural performance through four primary principles.

Reinforcing Bank Mandiri’s Corporate Identity

As the headquarters of Indonesia’s largest state-owned bank, the lighting composition was designed to express dignity, stability, and institutional presence.

Rather than relying on excessive brightness, the facade illumination was carefully composed to create a refined and authoritative nighttime character that reflects the values of the corporation.

The design emphasizes visual hierarchy, proportion, and controlled luminance to strengthen the building’s identity within Jakarta’s skyline.

Facade as an Architectural Communication Medium

The facade was treated not only as an architectural surface, but also as a communication medium.

The lighting system was designed to support both static and dynamic lighting scenarios, enabling the integration of branding, corporate messaging, and special event illumination without compromising the architectural integrity of the building.

This approach allows the tower to remain adaptable for future marketing and urban activation strategies while maintaining visual coherence.

Creating a Landmark Within the SCBD District

Located within Jakarta’s prominent SCBD business district, the project aimed to establish a strong nighttime identity while avoiding unnecessary visual domination over its surroundings.

The lighting design carefully balances visibility and contextual sensitivity, allowing the building to become a recognizable urban landmark without contributing to excessive visual clutter or aggressive skyline competition.

The result is a facade presence that feels iconic, elegant, and contextually integrated into the urban nighttime environment.

Urban Nighttime Environment Challenge

One of the major challenges surrounding the project was the increasingly dense nighttime lighting environment within Jakarta’s SCBD district.

The surrounding urban context consists of high-rise office towers, commercial developments, digital media facades, street lighting, and illuminated architectural elements that collectively contribute to elevated ambient brightness and visual congestion at night.

In highly illuminated business districts, facade lighting can easily become excessive, visually aggressive, and environmentally disruptive when buildings compete for attention through uncontrolled brightness.

This condition may contribute to:

• Visual fatigue

• Excessive glare

• Loss of architectural hierarchy

• Skyglow and urban light pollution

• Reduced nighttime environmental quality

• Disturbance to surrounding occupants and ecosystems

The challenge for Plaza Mandiri was therefore not simply to make the building brighter, but to create a facade lighting identity that remained elegant, recognizable, and environmentally responsible within an already saturated nighttime environment.

Measurable and Performance-Based Design Process

The lighting development process combined qualitative architectural evaluation with quantitative lighting analysis to ensure that design decisions were visually effective and technically measurable. Below are our three step design process:

Night Time Environmental Light Analysis

Baseline lux level measurements were conducted to understand the surrounding nighttime lighting conditions and contextual urban brightness.

False Colour Mapping Evaluation

False colour luminance mapping was utilized to evaluate facade brightness distribution, visual hierarchy, and lighting balance across the architectural surfaces.

3D Visual Validation

Three-dimensional renderings and simulations were developed to validate the visual impact, architectural perception, and urban integration of the lighting concept before implementation.

Environmental Responsibility and Nighttime Wellbeing

Environmental responsibility became an essential part of the design strategy.

The project considered the impact of artificial lighting on human health, visual comfort, and the nighttime urban ecosystem through controlled illumination levels and mitigation of unnecessary light pollution.

The design approach focused on:

• Controlled luminance levels

• Reduced glare

• Balanced facade brightness

• Limitation of upward light spill

• Improved nighttime visual comfort

• Reduced environmental disturbance

Instead of maximizing brightness output, the facade lighting was calibrated to achieve visual effectiveness with measured environmental sensitivity.

This methodology supports a more sustainable and human-centric urban lighting environment.

Contextual, Measurable, and Relevant Lighting Design

This approach ensured that the facade lighting was not only visually striking, but also contextual, measurable, and relevant to its architectural, urban, and environmental responsibilities.

By integrating architectural lighting design with corporate identity, urban sensitivity, and environmental performance, the Plaza Mandiri (Wisma Danantara) project demonstrates how facade lighting can become a strategic design instrument that shapes both city image and human nighttime experience.

Worship Lighting Design for Sacred Architecture Makassar Cathedral

Project Overview

For centuries, churches and cathedrals have used light as both a practical and symbolic element of worship. Beyond providing visibility, light helps shape emotional perception, reinforce liturgical symbolism, and create a sense of connection between worshippers and the sacred environment.

The renovation of Makassar Cathedral presented an opportunity to rethink how lighting could support contemporary worship while respecting the architectural identity of one of the city's most important Catholic landmarks. The project focused on enhancing the visual experience of the liturgy, revealing the beauty of the cathedral's architecture, and creating a more contemplative and spiritually engaging worship environment.

The Challenge

The cathedral's architecture is characterized by its dramatic timber vaulted ceiling, Gothic-inspired arches, stained-glass windows, and prominent liturgical focal points. While these elements possess strong architectural character, their visual impact can be diminished without a carefully coordinated lighting strategy.

The challenge was not simply increasing brightness levels. Instead, the design needed to balance multiple objectives:

• Supporting visual requirements for worship and liturgical celebrations.

• Revealing the architectural beauty of the timber roof structure.

• Creating appropriate visual hierarchy between congregation and altar.

• Enhancing the perception of sacred space.

• Improving visual comfort while minimizing glare.

• Preserving a warm and welcoming atmosphere for daily worship.

Lighting Design Approach

The lighting design was developed through a human-centered and liturgically informed approach.

Rather than treating the cathedral as a uniformly illuminated space, the design focused on creating layers of light that support both architecture and worship experience. Special attention was given to the relationship between ambient illumination, architectural lighting, and liturgical focal lighting.

The timber vaulted ceiling was identified as the cathedral's most distinctive architectural feature. Carefully integrated indirect lighting was used to reveal the geometry, depth, and craftsmanship of the roof structure while maintaining visual comfort and minimizing glare.

The lighting strategy also reinforced the natural visual progression from the congregation area toward the sanctuary, altar, crucifix, and liturgical furnishings.

Human-Centered Performance Strategy

Lighting within sacred architecture influences more than visibility. It affects how worshippers perceive space, focus attention, experience emotion, and engage in prayer.

The design considered how people:

• Enter and orient themselves within the cathedral.

• Participate in worship and liturgical celebrations.

• Experience moments of prayer and reflection.

• Perceive architectural scale and sacred symbolism.

• Connect emotionally with the liturgical environment.

A carefully controlled balance between light and shadow was used to create a sense of reverence and spatial depth. By avoiding excessive brightness and maintaining visual hierarchy, the lighting supports contemplation while allowing key liturgical elements to remain visually prominent.

The resulting environment encourages a worship experience that feels calm, dignified, and spiritually meaningful.

Design Integration

The lighting design was closely integrated with architecture, liturgy, and building technology.

Key design strategies included:

• Indirect illumination of the timber vaulted ceiling to emphasize architectural form and spatial grandeur.

• Vertical illumination of columns and arches to reinforce the Gothic character of the interior.

• Liturgical focal lighting to strengthen attention toward the sanctuary and altar.

• High-quality color rendering to reveal natural material textures and stained-glass details.

• Glare-controlled luminaires to improve visual comfort during worship.

• Energy-efficient LED technology to support long-term sustainability and maintenance objectives.

• Flexible lighting control systems to accommodate different liturgical celebrations and worship scenarios.

This integrated approach ensures that the lighting contributes simultaneously to architectural appreciation, liturgical function, and human experience.

Lighting Design Impact

The renovation lighting strategy transformed the cathedral into a more visually coherent and spiritually engaging worship environment.

The illuminated timber ceiling now becomes a defining architectural element, revealing the craftsmanship and verticality of the space. Carefully controlled contrast and visual hierarchy guide attention toward the sanctuary while maintaining a warm and welcoming atmosphere throughout the nave.

Rather than competing with the architecture, the lighting works in harmony with it—supporting worship, enhancing sacred atmosphere, and strengthening the emotional connection between people, architecture, and faith.

The project demonstrates how thoughtful worship lighting design can elevate both liturgical experience and architectural perception, ensuring that Makassar Cathedral continues to serve as a place of prayer, community, and spiritual inspiration for future generations.

Consult Your Lighting Design Project

ALTA Integra is a Building Science and Technology consultancy dedicated to creating human-centered environments through evidence-based design. By studying the relationship between light, sound, space, technology, and human emotion, we help transform buildings into places that inspire wellbeing, strengthen identity, emotional support space, and dedicated for a more sustainable future.

Whether you are designing a place of worship, heritage building, hospitality destination, workplace, educational facility, or public space, our lighting consultancy services help translate design vision into meaningful visual, emotional, and environmental performance.

Sacred Facade Lighting Design of Makassar Cathedral

Project Overview

The sacred facade lighting design for Makassar Cathedral Church was developed to enhance the nighttime identity of one of the city’s important religious landmarks while respecting the spiritual character and historical architectural presence of the church.

Rather than treating facade lighting as a purely decorative element, the project approached light as a medium for reinforcing sacred atmosphere, light as a communication medium, and urban presence after dark.

The design aimed to reveal the architectural beauty of the cathedral in a subtle and respectful manner while improving nighttime visibility, visual comfort, and contextual integration within the surrounding urban environment.

The Challenge

Religious architecture presents unique lighting challenges compared to commercial or entertainment buildings.

The facade lighting needed to:

• Preserve the sacred and contemplative identity of the church

• Avoid excessive brightness and visual aggression

• Respect the surrounding urban environment

• Maintain architectural authenticity

• Enhance visibility without creating glare

• Support nighttime recognition and wayfinding

In many urban environments, facade lighting can easily become overpowering, especially when influenced by commercial lighting approaches that prioritize brightness over atmosphere and architectural sensitivity.

For a cathedral church, the challenge was not to create spectacle, but to create dignity, warmth, and spiritual presence through light.

Additionally, the project had to consider the impact of artificial lighting on nearby residents, urban nighttime ambience, and environmental light pollution.

Preliminary Design Study

Our preliminary design study began with understanding the architectural language and spiritual significance of the cathedral itself. Instead of uniformly illuminating the entire building, the lighting composition was carefully layered to reveal:

• Visual hierarchy

• Sacred focal points

• Architectural depth

• Vertical proportion

• Material texture

The lighting strategy emphasized controlled illumination and selective accentuation to preserve the calm and graceful character of the church facade. Warm color temperature selections were carefully integrated to support a welcoming and contemplative nighttime atmosphere while avoiding harsh visual contrast.

The facade was treated as an architectural canvas where light reinforces form, rhythm, and symbolism rather than overpowering the architecture itself.

Human-Centered Lighting Performance Strategy

The project adopted a human-centered lighting approach that prioritizes visual comfort, emotional perception, and environmental wellbeing. Rather than maximizing brightness levels, the design focused on creating balanced luminance and soft visual transitions that feel comfortable for pedestrians, worshippers, and the surrounding community.

The performance strategy considered:

• Visual comfort at pedestrian level

• Reduction of glare

• Controlled luminance distribution

• Night Time visual adaptation

• Contextual brightness within the surrounding area

• Environmental sensitivity and reduced light spill

The lighting composition was calibrated to ensure that the church remains visually prominent without contributing excessive nighttime brightness to the urban environment.

This approach supports both spiritual atmosphere and healthier nighttime environmental conditions.

Lighting Design Integration Study

The facade lighting system was developed through integration between architectural intent, lighting performance, and environmental context.

Design development included:

• Architectural facade analysis

• Nighttime contextual studies

• Lighting hierarchy planning

• Beam angle optimization

• Material reflectance evaluation

• Visual simulation and rendering validation

By coordinating lighting placement with the architectural composition, the design minimizes visible equipment presence while preserving the integrity of the cathedral facade during daytime conditions.

The result is a lighting system that feels architecturally integrated rather than technically imposed.

Our Lighting Design Impact

The final design establishes Makassar Cathedral Church as a dignified and recognizable nighttime landmark while preserving its sacred identity and architectural character. The facade lighting enhances the perception of depth, warmth, and spiritual presence without relying on excessive illumination or visual spectacle.

Through a contextual and performance-based design methodology, the project demonstrates how architectural lighting can support not only aesthetics, but also human experience, urban sensitivity, and environmental responsibility. The project reflects a broader design philosophy in which lighting becomes an instrument for shaping atmosphere, identity, and meaningful night-time architecture.

Consult Your Lighting Design Project

ALTA Integra is a Building Science and Technology consultancy dedicated to creating human-centered environments through evidence-based design. By studying the relationship between light, sound, space, technology, and human emotion, we help transform buildings into places that inspire wellbeing, strengthen identity, emotional support space, and dedicated for a more sustainable future.

Whether you are designing a place of worship, heritage building, hospitality destination, workplace, educational facility, or public space, our lighting consultancy services help translate design vision into meaningful visual, emotional, and environmental performance.

Concert Hall Acoustic Consultant Indonesia: RuBIK Theater and Concert Hall Jakarta Case Study

A New Cultural Landmark for Indonesia

When people visit a concert hall or theater, they typically notice the architecture, the stage, the performers, and the atmosphere of the space. Very few people think about the sound isolation hidden inside the walls, the vibration control beneath the floors, or the acoustic engineering required to keep mechanical noise from interfering with a performance.

Yet these invisible elements often determine whether a performance venue succeeds or fails.

In 2024, ALTA Integra had the opportunity to contribute to one of Indonesia's most ambitious performing arts developments: RuBIK (Rumah Budaya Indonesia Kaya), a new theater and concert hall complex located in Permata Hijau, Jakarta.

Designed by SHAU Architects, interior design by Domisilium, structural engineering by Davy Sukamta & Partners, and MEP engineering by Meinhardt, with acoustic design by Nagata Acoustics Japan and ALTA Integra the project is envisioned as a major destination for Indonesia's growing performing arts community.

The development includes:

• A 1,200-seat main theater and concert hall

• A 300-seat black box theater

• Rehearsal and educational spaces

• Exhibition facilities

• Supporting cultural and community functions

Currently under construction, RuBIK represents a significant investment in Indonesia's cultural future and demonstrates the increasing demand for world-class performance venues throughout the region.

For ALTA Integra, our role focused on reviewing critical building acoustic and environmental noise aspects to support an exceptional audience experience and achieve stringent NC-20 to NC-25 background noise criteria.

Our scope included:

• All space background noise criteria review

• Environmental Noise Assessment

• Building acoustic performance review: STC and OITC evaluation

• HVAC noise control: Mechanical and electrical noise mitigation

• Building-Generated Noise to Neighbour Community

These topics may sound highly technical, but ultimately they serve one simple purpose:

To ensure audiences hear the performance—and nothing else.

AI Generated Architectural Rendering of RuBIK Concert Hall and Theater Jakarta

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Why Acoustic Design Matters in Performing Arts Buildings

Concert halls and theaters are among the most acoustically demanding building types in the world.

Unlike offices, hotels, retail centers, or commercial buildings, performance venues are designed to support moments of extraordinary acoustic sensitivity.

A whispered line of dialogue must remain intelligible to the audience.

A violin solo must sound delicate and clear.

A choir must be heard without distraction.

A dramatic pause must feel completely silent.

In many cases, background noise levels that would be acceptable in a corporate office become unacceptable in a concert hall.

Creating these environments requires close collaboration between architects, acoustic consultants, structural engineers, MEP engineers, interior designers, and building physics specialists from the earliest stages of design.

The challenge becomes even greater in a dense urban environment such as Jakarta, where traffic, transportation systems, commercial activities, and building services continuously generate noise.

Creating silence within a noisy city is never easy.That is where concert hall acoustic consultants play a critical role.

During the construction phase, Herwin Gunawan evaluated acoustic lagging technical drawings and mock-up installations to confirm that the specified acoustic treatments were correctly implemented.

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What Does a Concert Hall Acoustic Consultant in Indonesia Do?

Many people are familiar with architects and engineers, but fewer understand the role of a concert hall acoustic consultant.

A concert hall acoustic consultant helps design spaces where sound can be experienced exactly as intended by performers, directors, composers, and audiences.

This often involves:

• Room acoustic design

• Sound isolation design

• Building acoustic review

• HVAC noise control

• Vibration control

• Environmental noise assessment

• Sound transmission analysis

• Performance criteria development

• Acoustic simulation and modelling

In Indonesia, these challenges are often amplified by dense urban environments, tropical climate conditions, and the need for large mechanical cooling systems that operate year-round.

As a result, concert hall acoustic design in Indonesia requires balancing architectural vision, occupant comfort, environmental responsibility, and acoustic excellence simultaneously.

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The Acoustic Challenge of Building a Cultural Landmark in an Urban Environment

Located in the vibrant urban district of Permata Hijau, Jakarta, RuBIK Theater and Concert Hall is surrounded by residential neighborhoods, commercial developments, transportation networks, and the constant activity of a modern city. While this location offers excellent accessibility and cultural visibility, it also presents one of the most demanding acoustic challenges in performing arts design.

Achieving NC-20 to NC-25: Designing for Silence

One of the most demanding acoustic performance requirements for RuBIK was achieving an exceptionally low indoor background noise level of NC-25 within the main theater and concert hall, with certain operational scenarios aspiring toward NC-20 performance conditions.

For those unfamiliar with acoustics, NC (Noise Criteria) is an internationally recognized rating system used to evaluate indoor background noise generated by building services such as air-conditioning systems, ventilation equipment, pumps, and other mechanical systems. Lower NC ratings indicate quieter environments and are typically reserved for spaces where critical listening is essential.

In performing arts venues, achieving a low NC rating is not only important for audience comfort and musical appreciation. It is also increasingly necessary to support professional audio recording, live streaming, broadcast productions, and digital content creation. Modern concert halls and theaters are expected to serve not only live audiences but also remote audiences through television broadcasts, online streaming platforms, archival recordings, and hybrid events.

Even subtle background noise from HVAC systems can be captured by sensitive microphones during a recording session or live broadcast, reducing audio clarity and increasing post-production challenges. For this reason, many world-class performance venues target NC-20 to NC-25 environments to ensure that both live audiences and remote listeners experience the highest possible sound quality.

At RuBIK, maintaining stringent background noise criteria was therefore critical not only for theatrical and musical performances, but also for supporting future recording, broadcasting, and digital media applications that are increasingly becoming part of contemporary performing arts venues.

What Does NC-25 Actually Sound Like?

NC-25 represents an exceptionally quiet indoor environment, typically required for high-performance performing arts venues where even subtle background noise can compromise the audience experience.

For comparison:

• Typical Office Environment: NC-35 to NC-45

• Hotel Guest Room: NC-30 to NC-35

• High-Performance Theater or Concert Hall: NC-20 to NC-25

At NC-25, the mechanical systems virtually disappear from perception. The space becomes quiet enough for audiences to appreciate the finest details of a performance from the delicate resonance of a violin string and the natural decay of a piano note to the softest theatrical dialogue spoken on stage.

While NC-25 may appear to be just a number on a specification sheet, achieving it is anything but simple. It requires close collaboration between acoustic consultants, architects, and MEP engineers throughout the design process. Every duct, diffuser, air-handling unit, fan, and mechanical room must be carefully evaluated to ensure the building itself does not compete with the performance.

Keeping the City Outside the Concert Hall

A concert hall should transport audiences into another world. Yet in a dense urban environment like Jakarta, the city is constantly generating sound.

Traffic movement, motorcycles, buses, delivery vehicles, commercial activities, and general urban life all contribute to the surrounding soundscape. Without proper acoustic isolation, these external noises can infiltrate the performance space and disrupt even the most carefully designed acoustic environment.

For RuBIK, particular attention was given to the building envelope and sound isolation strategy to ensure that external noise remains outside where it belongs. During a quiet orchestral passage or a dramatic theatrical pause, audiences should hear only the performance—not the city beyond the walls.

Mitigating HVAC and Building-Generated Noise

Creating a quiet concert hall is not only about blocking noise from entering the hall. Equally important is controlling the noise generated by the building itself.

Mechanical and electrical systems are often among the largest contributors to background noise in performance venues. Air-conditioning equipment, ventilation systems, cooling infrastructure, pumps, and emergency generators can all introduce unwanted sound and vibration if not carefully designed.

For this reason, HVAC noise mitigation formed a critical component of the acoustic review process. The challenge was to provide the airflow and thermal comfort required for large audience spaces while maintaining stringent NC-25 acoustic criteria.

Through careful acoustic engineering, equipment selection, vibration isolation, noise attenuation strategies, and coordination with the wider design team, the project sought to balance operational requirements with both audience comfort and community well-being.

Ultimately, successful concert hall acoustics require more than great room design. They demand an integrated approach where architecture, acoustics, mechanical engineering, and environmental responsibility work together to create spaces that are both culturally inspiring and acoustically exceptional.

Acoustic lagging mock-up review for plumbing and HVAC ductwork to mitigate noise breakout, reduce flanking sound transmission, and support the sound isolation performance requirements of the theater and concert hall.

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Part 1: Concert Hall Sound Isolation and Building Acoustic Performance

One of ALTA Integra's primary tasks was reviewing the building's sound isolation performance. When discussing acoustic quality, people often focus on room acoustics such as reverberation and sound reflections.

However, before room acoustics can perform properly, sound isolation must be addressed. If external noise leaks into the hall, even the best room acoustics cannot compensate. Likewise, if loud performances leak into adjacent spaces, operational conflicts quickly emerge.

Understanding STC

A major component of the review involved evaluating Sound Transmission Class (STC) performance. STC measures how effectively a wall, partition, floor, or building assembly blocks airborne sound transmission. For example: Speech, Music Amplified sound and Crowd noise.

Higher STC values indicate greater sound isolation. For a performing arts facility, this becomes particularly important between:

• Theater and lobby areas

• Concert hall and support spaces

• Rehearsal rooms and classrooms

• Technical rooms and audience areas

• Black box theater and adjacent functions

Our review assessed whether architectural assemblies could achieve the intended acoustic separation necessary for simultaneous operation of multiple activities.

Looking Beyond STC: The Importance of OITC

One interesting aspect of this project was the evaluation of Outdoor-Indoor Transmission Class (OITC). While STC is widely known among architects and engineers, OITC often receives less attention.

However, for urban cultural buildings, OITC can be equally important. OITC focuses on lower-frequency noise sources such as:

• Road traffic

• Trucks

• Heavy vehicles

• Mechanical equipment

• Urban environmental noise

These lower frequencies are often more difficult to control than speech frequencies.

A façade system that performs well under STC testing may not necessarily provide sufficient low-frequency isolation. This is particularly relevant for performance spaces where even distant traffic rumble can become noticeable during quiet musical passages.

Our review considered how the building envelope could contribute to maintaining a suitable acoustic environment within critical performance spaces.

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Part 2: HVAC Noise Control — The Hidden Acoustic Challenge Behind Every Great Performance Venue

When people think about concert hall acoustics, they usually imagine beautiful architectural forms, carefully shaped wall surfaces, suspended acoustic reflectors, or perhaps the expertise of renowned acousticians.

Very few people think about air-conditioning ducts. Yet after working on theaters, auditoriums, houses of worship, and performance venues for many years, I have learned that some of the biggest acoustic challenges are often hidden above the ceiling.

In fact, one of the most common reasons a performance space fails to achieve its acoustic targets has nothing to do with room acoustics. It is often the HVAC system.

The irony is that audiences rarely notice a well-designed HVAC system because they are not supposed to. The best HVAC systems are effectively invisible. They quietly deliver thermal comfort without drawing attention to themselves.

Unfortunately, when HVAC noise is not properly controlled, everyone notices.

A gentle orchestral passage suddenly competes with a low-frequency rumble. A dramatic pause during a theater performance is interrupted by a hiss from an air diffuser. A recording session captures unwanted mechanical noise that was never intended to be part of the performance.

At that moment, the building becomes audible. And that is exactly what acoustic designers try to avoid.

Why Silence Matters in Performance Spaces

Most people are surprised when they learn how quiet a concert hall or theater is expected to be.

For many building types, some background noise is acceptable. An office can tolerate conversations, computer fans, and air-conditioning noise. A shopping mall is expected to be lively. A transportation terminal is naturally noisy.

A concert hall is different.

During a musical performance, audiences may be listening to sounds that are incredibly delicate. A violin played pianissimo, the natural decay of a piano note, the resonance of a choir, or a whispered line in a theatrical production can all be masked by background noise generated by the building itself.

The quieter the room becomes, the more noticeable mechanical noise becomes. This is why high-performance theaters and concert halls often target stringent background noise criteria such as NC-25 or even NC-20.

Achieving these targets requires much more than simply selecting quiet equipment. It requires a comprehensive understanding of how sound is generated, transmitted, and perceived throughout the entire mechanical system.

The HVAC System: An Invisible Sound Source

From an acoustic perspective, HVAC systems behave like complex networks of interconnected noise sources. Every component has the potential to contribute unwanted sound.

Some sources are obvious. Others are surprisingly difficult to identify. The challenge is that even if each individual component appears acceptable, the combined effect can still exceed the acoustic criteria for the space.

Understanding where HVAC noise originates is therefore the first step toward controlling it.

Airflow Noise

One of the most common acoustic problems occurs when air moves too quickly through ducts, grilles, or diffusers. As airflow velocity increases, turbulence develops. This turbulence generates sound.

Most people have experienced this phenomenon without realizing it. Stand underneath a supply diffuser in a typical office building and you may hear a gentle rushing sound. In many commercial buildings this is perfectly acceptable.

In a concert hall, however, the same noise can become problematic.

For performance spaces, duct sizing and air distribution strategies must often prioritize low air velocities. Larger ducts and carefully designed air distribution systems help reduce turbulence and minimize airflow-generated noise.

The challenge is that larger ducts require more space, creating coordination challenges with architecture, structure, lighting, and other building services.

This is one reason acoustic considerations should be integrated early in the design process rather than addressed after ceiling layouts have already been finalized.

Fan Noise

Fans are often the primary noise generators within HVAC systems.

Whether located inside air-handling units, fan coil units, exhaust systems, or ventilation equipment, fans generate both broadband and tonal noise that can travel considerable distances through duct networks.

Without proper treatment, fan noise can propagate directly into performance spaces. A useful way to think about fan noise is to imagine placing a loudspeaker inside a duct system. The duct essentially becomes a pathway that allows sound to travel from one location to another.

This is why silencers, acoustic lining, equipment selection, and proper system design become essential components of HVAC acoustic engineering. A quiet concert hall often begins with a quiet mechanical room.

Duct Rumble and Low-Frequency Noise

Low-frequency noise is one of the most difficult acoustic challenges in building design. Unlike higher-frequency sounds, low-frequency energy travels efficiently through large spaces and building structures.

It is also harder for the human ear to ignore. In performance venues, low-frequency HVAC noise is often described as:

• A rumble

• A hum

• A drone

• A distant vibration

The difficulty is that occupants may not consciously hear it, but they still perceive it. This can reduce the sense of acoustic clarity and increase listener fatigue over time.

Low-frequency control often requires careful coordination between equipment selection, duct design, vibration isolation, and building acoustic treatments.

It is one of the reasons why achieving NC-25 is significantly more difficult than many people initially expect.

Terminal Device Noise

The final stage of the HVAC system is where conditioned air enters the occupied space. This typically occurs through supply diffusers, grilles, slot outlets, or other terminal devices.

Even when the central HVAC equipment is quiet, poorly selected terminal devices can become localized noise sources. Because these devices are located directly above audience seating areas, even relatively small amounts of noise can become noticeable.

In performance spaces, diffuser selection often becomes an acoustic decision as much as a mechanical one. The goal is to distribute air effectively while remaining acoustically invisible.

When successful, audiences experience comfort without ever noticing where the air is coming from.

Mechanical Vibration

Not all HVAC noise travels through the air. Some of it travels through the building structure itself. Mechanical equipment generates vibration that can propagate through structural elements if not properly isolated.

This phenomenon is known as structure-borne noise.

In some cases, vibration generated by a mechanical room several floors away can become audible inside a theater or concert hall. The source may appear distant, yet the effect can be surprisingly noticeable.

To address this challenge, engineers often employ:

• Spring isolators

• Rubber isolation mounts

• Inertia bases

• Flexible duct connections

• Floating equipment platforms

These systems help prevent vibration from entering the building structure and becoming audible within critical listening spaces.

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Part 3: Building-Generated Noise for Surrounding Communities

A key objective of our review was evaluating how generator noise could affect surrounding residential areas. Rather than focusing only on the equipment itself, we considered how sound propagates beyond the site boundary.

This perspective is important because environmental noise performance should be evaluated from the receiver's point of view. Ultimately, the success of noise control is measured not at the generator room, but at the neighboring community.

Generator Noise: Protecting the Neighboring Community

One of the most important environmental noise topics involved the emergency generator systems. Backup generators are essential for large public facilities. However, they are also among the loudest pieces of equipment in a building.

In many projects, generator noise becomes a source of community complaints after occupancy. For cultural facilities operating within urban neighborhoods, this risk is even greater. Generator Noise Is Challenging because it produce multiple noise simultaneously: Engine noise, Cooling fan noise, Air intake noise, Exhaust noise and Structure-borne vibration

Each source behaves differently and requires different mitigation strategies. Simply installing an acoustic enclosure is rarely sufficient. A comprehensive approach typically requires coordinated treatment of: Acoustic louvers, Silencers, Exhaust systems, Equipment placement, Vibration isolation and Noise barriers.

ALTA Integra Acoustic Team with Shimizu Corporation Engineering Team

Collaborative Design Leadership

The success of a high-performance performing arts venue depends on far more than individual disciplines working independently. Concert halls and theaters are among the most technically demanding building types, requiring architects, acoustic consultants, structural engineers, interior designers, MEP engineers, contractors, and owners to work toward a shared performance objective from the earliest stages of design.

Under the project leadership of Shimizu Corporation, RuBIK assembled a highly collaborative multidisciplinary team comprising SHAU Architects, Nagata Acoustics Japan, Domisilium, Davy Sukamta & Partners, WSP, and ALTA Integra. This integrated approach created opportunities to identify and resolve acoustic challenges long before they became construction issues.

One lesson we have learned repeatedly throughout our projects is that acoustic problems become significantly more expensive when discovered late. Acoustics should never be treated as a finishing-stage exercise or a layer applied after the design is substantially complete.

The most successful projects integrate acoustic thinking from the earliest planning and design phases. Decisions regarding building massing, room layouts, structural systems, mechanical equipment locations, façade design, and building services coordination can all have profound impacts on acoustic performance.

For RuBIK, early collaboration between the design team enabled proactive discussions on sound isolation, HVAC noise control, vibration mitigation, environmental noise management, and performance venue acoustic criteria. This approach allowed potential challenges to be addressed during design development rather than through costly corrective measures during construction or after occupancy.

Ultimately, this proactive and collaborative process consistently produces better outcomes than attempting to solve acoustic problems after installation. For a project aspiring to become one of Indonesia's premier cultural venues, early coordination was not simply beneficial it was essential.

Supporting the Future of Indonesian Performing Arts

Indonesia's performing arts ecosystem continues to evolve. As new cultural institutions emerge and audience expectations increase, the demand for high-performance theater and concert hall acoustics will continue to grow.

Projects such as RuBIK demonstrate the importance of integrating architecture, acoustics, engineering, and building physics into a unified design process. Beyond creating a world-class venue, the project also reflects a broader cultural vision: preserving, promoting, and reintroducing Indonesia's rich artistic heritage to future generations.

As part of the Djarum Foundation's commitment to cultural development through Bakti Budaya, RuBIK represents more than a physical building. It is an investment in Indonesia's creative future and a platform for nurturing appreciation of traditional performing arts, opera, orchestral music, theater, dance, and contemporary cultural expression.

This mission is particularly relevant as a new generation of audiences emerges. While Generation Z is often associated with digital media, social platforms, and short-form content, there is also a growing interest among younger Indonesians in authentic cultural experiences, live performances, heritage, and artistic storytelling. Modern performance venues such as RuBIK can play an important role in bridging tradition and innovation—creating opportunities for younger audiences to engage with Indonesian culture, classical music, opera, and performing arts in meaningful and contemporary ways.

For ALTA Integra, participating in this project was an opportunity to contribute to a venue that has the potential to become a significant cultural landmark for Jakarta and Indonesia. By supporting an acoustic environment capable of delivering exceptional listening experiences, the project helps ensure that performers, musicians, educators, and audiences can connect through the power of sound and artistic expression.

While audiences may never see the STC calculations, OITC evaluations, HVAC noise studies, vibration isolation systems, or environmental noise assessments behind the scenes, these invisible engineering decisions shape every performance experience.

When the curtain rises and audiences become immersed in music, theater, dance, and artistic expression without distraction, the building is doing exactly what it was designed to do.

And ultimately, that is the goal of concert hall acoustics: to create an environment where architecture disappears, technology becomes invisible, culture takes center stage, and the next generation can experience the richness of Indonesia's performing arts heritage at its very best.

ALTA Integra's Experience as a Concert Hall Acoustic Consultant in Indonesia

ALTA Integra provides acoustic consulting services for concert halls, theaters, auditoriums, performing arts centers, houses of worship, educational facilities, and other acoustically critical environments throughout Jakarta, Surabaya, Bandung, Bali, Yogyakarta, Medan, Makassar, and other cities across Indonesia and Southeast Asia.

As a Concert Hall Acoustic Consultant in Indonesia, ALTA Integra supports architects, developers, cultural institutions, universities, houses of worship, and government organizations in creating high-performance venues for music, theater, speech, recording, and broadcast applications.

Our experience also includes acoustic consulting for performing arts centers, opera houses, recital halls, symphony halls, multipurpose auditoriums, cultural venues, music education facilities, and broadcast-ready performance spaces. Services may include room acoustic analysis, reverberation time optimization, speech intelligibility assessment, electroacoustic system coordination, architectural acoustics, environmental noise control, acoustic commissioning, and performance venue acoustic design.

Our expertise also extends to acoustic master planning, auditorium design review, acoustic performance verification, building services acoustics, noise and vibration assessment, façade acoustic design, acoustic measurement and testing, and construction-phase acoustic quality assurance. These services help ensure that performance venues achieve their intended acoustic objectives from concept design through construction and commissioning.

These disciplines work together to create immersive listening environments that support live performance, recording, streaming, and broadcast applications.

By integrating acoustics, lighting, audiovisual technology, sustainability, and human-centered building performance, we help project teams create spaces that are not only technically successful, but also meaningful for the people who experience them.

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Frequently Asked Questions

What does a concert hall acoustic consultant do?

A concert hall acoustic consultant helps create performance venues that deliver exceptional listening experiences for music, theater, speech, recording, and live broadcasting. Their role typically includes room acoustic design, sound isolation design, HVAC noise control, vibration control, environmental noise assessment, acoustic simulation, and performance criteria development.

By working closely with architects, structural engineers, interior designers, and MEP consultants, a concert hall acoustic consultant helps ensure that audiences hear the performance as intended, free from unwanted noise and distractions. The goal is to create spaces where performers can communicate clearly and audiences can fully engage with the artistic experience.

What is NC-25 in a concert hall?

NC-25 refers to a Noise Criteria rating of 25, which indicates an exceptionally quiet indoor environment. It is commonly used as a design target for high-performance theaters, concert halls, recital halls, and other critical listening spaces.

At NC-25, background noise generated by air-conditioning systems, ventilation equipment, pumps, and other building services is low enough that audiences can appreciate subtle musical details, natural reverberation, and quiet theatrical dialogue. Many world-class performing arts venues target NC-20 to NC-25 to support both live performances and professional recording or broadcast applications.

Why is HVAC noise control important in theaters?

HVAC systems are often the largest source of background noise in theaters and concert halls. Airflow turbulence, fan noise, duct rumble, diffuser noise, and mechanical vibration can all interfere with audience experience if not properly controlled.

Even relatively small amounts of HVAC noise can become noticeable during quiet performances, musical passages, or dramatic pauses. Effective HVAC noise control helps maintain low background noise levels, improve speech intelligibility, preserve musical clarity, and support recording and live broadcast quality. For this reason, acoustic consultants typically work closely with MEP engineers to develop HVAC systems that are both comfortable and acoustically unobtrusive.

What is the difference between STC and OITC?

STC (Sound Transmission Class) and OITC (Outdoor-Indoor Transmission Class) are both acoustic ratings used to evaluate sound isolation performance, but they focus on different types of noise.

STC primarily measures how effectively a building assembly blocks airborne sounds such as speech, music, and general indoor activity. It is commonly used to evaluate walls, floors, doors, and partitions between interior spaces.

OITC focuses on lower-frequency environmental noise such as road traffic, trucks, aircraft, railways, and mechanical equipment. It is particularly important for building façades and exterior walls located in urban environments.

For concert halls and theaters, both STC and OITC are important. STC helps control sound transmission between spaces within the building, while OITC helps prevent external environmental noise from entering performance spaces.

When should an acoustic consultant be involved in a project?

An acoustic consultant should ideally be engaged during the earliest stages of project planning and design. Early involvement allows acoustic requirements to be integrated into architectural layouts, building massing, structural systems, façade design, and mechanical engineering strategies before major decisions are finalized.

Addressing acoustic issues during concept design and schematic design is typically far more effective and cost-efficient than attempting corrective measures during construction or after occupancy. Early collaboration can help avoid costly redesigns, improve project performance, and ensure that acoustic objectives are successfully achieved throughout the project lifecycle.

For theaters, concert halls, auditoriums, houses of worship, educational facilities, and other acoustically sensitive environments, acoustic consultation is most valuable when it begins before design decisions become difficult or expensive to change.

Hybrid Learning Audiovisual and ICT System Design for Western Sydney University

Project Information

• Project: Western Sydney University

• Location: Surabaya, Indonesia

• Service: Hybrid Learning Audiovisual

• Scope: Audiovisual System Design, Audiovisual Commisioning

• AV Consultant: ALTA Integra

• Year: 2024

Project Overview

Modern education is no longer confined by geography. At Western Sydney University Surabaya, learning extends beyond physical classrooms—connecting students with international lecturers and enabling real-time global collaboration.

This project was designed to support a fully integrated hybrid learning environment, where on-site and remote participants experience the same level of clarity, engagement, and accessibility.

The Challenge

Hybrid education introduces a complex set of performance challenges that go beyond technology alone: Students struggle to clearly hear remote lecturers. Visual content is not equally accessible across the room. Interaction between physical and remote participants feels disconnected. Systems are often implemented without proper spatial and acoustic integration. The investment cost of the Audiovisual Technology meets the owner budget.

Our Approach

We developed a holistic audiovisual ecosystem, where architecture, acoustics, lighting, and AV systems work as one integrated solution. Key System Features: Real-time video conferencing (Zoom-enabled learning spaces). Clear audio capture and uniform sound distribution. Seamless content sharing (BYOM / wireless presentation). Flexible system supporting multiple teaching scenario. This creates one unified platform adaptable to lectures, discussions, and collaborative sessions.

Spatial Performance Strategy

Every learning space was engineered to deliver consistent performance: Capture both lecturer and student interaction clearly. Ensure intelligible sound throughout the room. Provide optimal visual accessibility for all users. Equalize experience between on-site and remote participants. The result is a balanced, inclusive learning environment—not just a connected one.

Design Integration

This project’s performance was driven by strong interdisciplinary collaboration: Cushman & Wakefield oversaw project management, interior, and lighting design; Iwan Prasetyo delivered acoustic strategies for optimal speech clarity; and NDY engineered MEP systems for seamless integration of technology within the space.

Outcome

Students and educators benefit from: Clear and reliable communication. Equal access to global teaching resources. Higher engagement and sustained focus. A more inclusive and effective learning experience. Hybrid education becomes not just functional—but transformational.

Based on the WSU AV Guidelines and Pedagogy, together with WSU Project Leader, Technology Advisor and Lecturer and multi-discipline design team we succeeded in developing the Education Audiovisual over Internet Protocol System Design for the entire campus at Western Sydney University Surabaya.

Let’s optimize your space for hybrid education.
Design beyond technology. Deliver performance through integration.

Sacred Liturgical Lighting Design for Maria Bunda Kita Catholic Church PIK2

Architectural Lighting Concept

Sacred Façade Lighting Design for Maria Bunda Kita Catholic Church PIK2

Vision: A Landmark for Faith, Community, and Cultural Harmony

Maria Bunda Kita Catholic Church was envisioned as more than a place of worship. It forms an integral part of the broader vision for Pantai Indah Kapuk 2 (PIK2), a new waterfront city masterplanned to create a vibrant destination where people can live, work, gather, and connect. The development brings together residential neighborhoods, commercial districts, tourism destinations, public open spaces, and civic landmarks into a cohesive urban environment that encourages both community life and cultural diversity.

Within this vision, the church is positioned as one of the defining civic landmarks of the township. Rather than standing in isolation, it is carefully integrated into a network of lakeside promenades, public plazas, and pedestrian-friendly spaces, allowing the church to become not only a spiritual destination for Catholics but also an architectural landmark that enriches the public realm.

A particularly meaningful aspect of the PIK2 masterplan is its commitment to celebrating Indonesia's cultural and religious diversity. Major houses of worship, including the Maria Bunda Kita Catholic Church and a prominent mosque, are intentionally located within the same civic district. This urban planning strategy reflects a vision of coexistence, where different faith communities share public spaces while maintaining their own distinct identities. Together, these landmarks symbolize mutual respect, harmony, and peaceful dialogue, reinforcing Indonesia's long-standing values of religious tolerance and social unity.

For the Maria Bunda Kita Catholic Church, this setting elevates its role beyond serving a parish congregation. The church is envisioned as a destination for worship, pilgrimage, reflection, and community gathering, while simultaneously contributing to the identity of PIK2 as a multicultural waterfront city. Through its monumental architecture, welcoming public spaces, and integration with the surrounding urban landscape, the project demonstrates how sacred architecture can enrich both the spiritual life of its community and the civic character of a modern city.

This broader vision also shaped the design approach adopted by the project team. Every aspect of the church—from its architecture and landscape to its acoustics, lighting, and audiovisual systems—was considered as part of a unified experience that supports worship while creating an inspiring, comfortable, and inclusive environment for both daily liturgy and major religious celebrations.

Architectural Background: A Contemporary Basilica Rooted in Timeless Tradition

"Architecture is the learned game, correct and magnificent, of forms assembled in the light." — Le Corbusier

Few building typologies carry as much symbolic weight as a church. Beyond sheltering a congregation, sacred architecture has long served as a physical expression of faith, memory, and hope—where stone, light, and proportion become a language that transcends words. From the great basilicas of Rome to the Gothic cathedrals of France, Europe's ecclesiastical masterpieces have inspired generations of architects to pursue buildings that elevate both the human spirit and the urban landscape.

Maria Bunda Kita Catholic Church at Pantai Indah Kapuk 2 (PIK2) continues this enduring tradition. Conceived as one of the defining landmarks within the waterfront development, the church draws inspiration from the classical architectural vocabulary of European basilicas while responding to the needs of a contemporary Indonesian Catholic community. Rather than replicating history, the design reinterprets centuries of sacred architectural principles through a modern lens, creating a place where timeless symbolism and present-day worship coexist.

Its composition is immediately recognizable. Monumental proportions establish a sense of permanence, while a carefully balanced symmetrical layout creates visual order and harmony. Rising above the composition is a majestic central dome, complemented by richly articulated façades, sculptural religious ornamentation, and luminous stained-glass windows that transform daylight into an ever-changing tapestry of color and devotion. Every architectural element contributes to a building that communicates reverence long before one steps inside.

The influence of Classical and Gothic traditions is particularly evident in the building's vertical composition. As the medieval architect and theologian Abbot Suger, whose vision profoundly shaped Gothic architecture, believed, sacred buildings should lift both the eyes and the soul toward the divine through the transformative power of light. That philosophy continues to resonate in Maria Bunda Kita Catholic Church, where soaring architectural forms guide one's gaze heavenward, expressing humanity's timeless aspiration to seek something greater than itsel

Lighting Scenario 18.00 to 22.00

Lighting Scenario 22.00 to 12.00

Among the church's most commanding features are its four monumental towers, each rising approximately 65 meters above the surrounding landscape. Visible from across the expanding PIK2 waterfront, these towers are designed not merely as architectural ornaments but as enduring urban landmarks. Throughout history, church towers have served as points of orientation for cities, announcing the presence of faith within the civic fabric. Here, they once again become beacons on the skyline, their elegant silhouettes reinforcing the church's role as both spiritual destination and architectural icon.

The scale of the sanctuary reflects this civic ambition. Designed to accommodate approximately 1,640 worshippers, Maria Bunda Kita Catholic Church is among the largest Catholic worship spaces in the Greater Jakarta region. Yet despite its monumental capacity, the architecture aspires to preserve an atmosphere of intimacy and contemplation. Large congregational celebrations, daily Eucharistic services, weddings, solemn liturgical seasons, sacred music performances, and moments of personal prayer are all envisioned within a space carefully proportioned to nurture both collective worship and individual reflection.

The development extends well beyond the sanctuary itself. Rather than functioning as an isolated church building, the project has been envisioned as an integrated ecclesiastical campus composed of three complementary precincts. At its heart stands the main church, the principal setting for liturgical celebrations and communal worship. Adjacent to it, the Rectory (Pastoran) provides residence and pastoral facilities for the clergy, supporting the church's ongoing ministry and community life. Completing the ensemble is Maria Plaza & Chapel, an inviting outdoor gathering space anchored by a smaller devotional chapel that offers opportunities for quiet prayer, processions, fellowship, and spiritual reflection amid the surrounding landscape.

Together, these three components create a destination that extends beyond the traditional understanding of a parish church. They form a place where architecture supports not only worship but also hospitality, community, pilgrimage, and cultural engagement. Public plazas invite visitors to linger, landscaped spaces encourage contemplation, and the sacred architecture establishes a dialogue with the broader waterfront city beyond.

As the poet Rainer Maria Rilke once wrote, "The only journey is the one within." Maria Bunda Kita Catholic Church is conceived as the architectural setting for that inward journey. Through enduring architectural language, carefully composed proportions, and spaces shaped by light, it seeks to offer every visitor—not only a destination within the city—but also a place where the human spirit can pause, reflect, and quietly ascend toward the transcendent.

Sacred Exterior Lighting Design: Illuminating Faith, Hope, and Welcome

"Light is the first element of design; without light there is no color, form, or space." — Thomas E. Farin

When daylight fades, architecture begins a second life.

A church that inspires beneath the tropical sun must also speak with quiet dignity after sunset. Yet illuminating a sacred building is never about making it brighter. It is about revealing its meaning. In the tradition of great cathedrals, light becomes an invisible material—one that shapes emotion, guides perception, and transforms stone into a vessel of faith.

For Maria Bunda Kita Catholic Church at Pantai Indah Kapuk 2, ALTA Integra approached the architectural façade lighting design as more than an architectural exercise. Every lighting decision was conceived to express the church's spiritual identity while reinforcing its Gothic-inspired architecture and civic presence within the Ecopark waterfront city.

At the heart of the design lies the very name of the church: Maria Bunda Kita—Our Mother Mary. Across centuries of Christian art and architecture, Mary has been portrayed as a source of compassion, protection, and unconditional love. Rather than relying on dramatic theatrical effects, the lighting composition embraces these same qualities through a carefully balanced orchestration of warmth, softness, and visual harmony. The church does not dominate the night; instead, it extends a gentle invitation. Like a mother waiting with open arms, the illuminated exterior becomes a quiet gesture of welcome—for the faithful returning home, for pilgrims seeking spiritual comfort, and for visitors encountering the church for the first time.

This philosophy echoes the words of the Lebanese poet Kahlil Gibran, who wrote, "Tenderness and kindness are not signs of weakness and despair, but manifestations of strength and resolution." The nighttime presence of Maria Bunda Kita is therefore not defined by spectacle, but by grace. Its illumination communicates reassurance rather than grandeur, inviting every passerby to pause, reflect, and feel embraced by the serenity of the sacred.

Integrated Special Lighting Design for Sacred Architecture

As a Special Lighting Design Consultant in Indonesia, ALTA Integra approached the project by integrating architectural lighting design, sacred liturgical lighting, and human-centered visual experience into a single cohesive design strategy. Every luminaire, beam angle, color temperature, mounting location, and control scene was carefully coordinated with the architectural composition to reveal the church's form without distracting from its sacred character. This integrated approach transforms lighting into an extension of architecture, reinforcing both spiritual symbolism and visual identity.

Equally important is the dialogue between light and architecture. Inspired by the enduring language of Gothic ecclesiastical design, the church's soaring vertical composition naturally directs the eye upward. ALTA Integra's lighting strategy reinforces this architectural narrative by allowing the illumination to ascend with the building itself. Each successive level is perceived as progressively lighter, more delicate, and increasingly transparent, visually reducing the apparent mass of the towers while celebrating their elegant proportions. The composition culminates at the highest architectural elements, where light appears to dissolve into the night sky, subtly expressing the timeless Christian symbolism of humanity's journey toward heaven.

This vertical choreography recalls the profound insight of Louis Kahn, who observed, "The sun never knew how great it was until it hit the side of a building." At night, carefully composed artificial light assumes that same role. It reveals the architecture not by overwhelming it, but by uncovering the rhythm of columns, the depth of cornices, the texture of stone, and the graceful silhouette of every tower against the darkness.

Rather than concealing the church's classical inspiration, the exterior lighting celebrates it. Rich architectural details, sculptural ornamentation, stained-glass compositions, and monumental proportions are revealed with restraint, allowing the building's craftsmanship to emerge naturally through layers of light and shadow. This approach preserves the dignity of the architecture while avoiding visual excess, ensuring that every illuminated element contributes to a coherent architectural story.

Lighting Simulation and Lighting Mock-Ups

The lighting design process included architectural lighting simulations, luminaire evaluation, visual hierarchy studies, and nighttime scene development to verify that every illuminated surface achieved the desired balance between emphasis, contrast, and visual comfort. Lighting mock-ups were also considered as part of the design verification process to evaluate material reflectance, color rendition, and visual perception under real-world conditions.

Digital lighting simulation enabled the design team to evaluate façade brightness, beam distribution, vertical illumination, glare control, and architectural composition before construction, reducing project risks while ensuring that the completed church would perform exactly as envisioned.

Energy-Efficient Landmark Lighting

Although the church presents a monumental nighttime presence, sustainability remained an important design consideration. High-efficiency LED luminaires, intelligent lighting control systems, and carefully selected beam optics minimize energy consumption while maximizing architectural expression. The restrained lighting composition also respects the surrounding public realm by avoiding excessive brightness and unnecessary light spill, allowing the church to remain a dignified landmark within the Ecopark waterfront environment.

Yet the design also looks beyond tradition. Advanced lighting control systems introduce remarkable flexibility, allowing the church to adapt its visual identity for different liturgical seasons, religious celebrations, civic commemorations, and special occasions. The building can quietly transform from the contemplative atmosphere of Holy Week to the joyful brilliance of Easter, from the warmth of Christmas celebrations to moments of national remembrance, all while preserving its architectural integrity. This adaptability bridges the timeless language of classical sacred architecture with the possibilities of contemporary lighting technology, ensuring that the church remains both historically rooted and future-ready.

Within the broader Ecopark waterfront masterplan, the illuminated church assumes an even greater civic role. As dusk settles over the lake, landscaped promenades, plazas, and surrounding public spaces, the church becomes a luminous point of orientation within the multi-faith city. It stands not in isolation but in conversation with the surrounding urban landscape, contributing to a shared public realm where architecture encourages dialogue, coexistence, and mutual respect among diverse communities. The illuminated towers become a familiar beacon on the skyline, offering both physical orientation and symbolic reassurance within the evolving city.

The celebrated Mexican architect Luis Barragán once remarked, "Light gives us the possibility of expressing emotions." At Maria Bunda Kita Catholic Church, those emotions are not merely aesthetic; they are deeply spiritual. Light reveals the architecture, while architecture gives physical form to faith, allowing both to shape an experience that transcends the building itself.

Why Sacred Lighting Design Requires Specialist Expertise

Unlike conventional exterior architectural lighting, sacred lighting design must balance theology, liturgical function, architecture, human perception, and technical performance. Every design decision influences how worshippers experience the building emotionally and spiritually. At ALTA Integra, this multidisciplinary process combines architectural lighting design, building physics, visual comfort, daylight integration, acoustics, and audiovisual coordination to create worship environments where architecture, light, and technology support one another as a unified whole.

Ultimately, the success of sacred façade lighting cannot be measured only in lux levels, uniformity ratios, or illuminated surfaces. Its true achievement lies in what people feel when they arrive.

For the Catholic community, the illuminated church becomes more than a landmark. It is a visible reminder that the doors of faith remain open long after sunset. It is a beacon of hope for pilgrims searching for peace, a welcoming embrace for families gathering in prayer, and a symbol of the enduring presence of Christ and the loving intercession of Maria Bunda Kita within the life of the Church.

As evening descends upon the waterfront, the harmony of light, architecture, and the surrounding public realm quietly fulfills its highest purpose—not simply illuminating a building, but illuminating the path that leads people home.

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Design Challenges: Balancing Vision, Faith, and Practicality

Every landmark project begins with a vision. Bringing that vision to life, however, is rarely a straightforward journey. Sacred architecture is among the most complex building typologies because it must satisfy not only architectural aspirations but also liturgical traditions, technical requirements, financial realities, and the expectations of an entire faith community.

For Maria Bunda Kita Catholic Church, the design process became a thoughtful exercise in balancing these often-competing priorities while preserving the church's spiritual identity.

A Shared Vision Shaped by Many Voices

"A great building must begin with the immeasurable." — Louis I. Kahn

Unlike commercial developments where decision-making may rest with a limited group of stakeholders, a major church project naturally involves a much broader circle of contributors. The developer, architects, clergy, parish representatives, liturgical advisors, engineers, consultants, and future users each brought valuable perspectives, shaped by their own experience, priorities, and understanding of what a contemporary Catholic church should represent.

Some emphasized theological symbolism and liturgical function. Others focused on architectural expression, operational practicality, long-term maintenance, construction feasibility, or financial stewardship. Each perspective was legitimate, and each reflected a genuine commitment to creating a church worthy of its congregation.

As the project evolved, these diverse aspirations occasionally pointed in different directions. Architectural elements were discussed, refined, reconsidered, and adjusted as the design sought to accommodate a wide range of expectations. The resulting architecture therefore became not the expression of a single design philosophy, but the outcome of a collaborative process built upon dialogue, compromise, and mutual respect.

For the design team, the challenge was not simply to satisfy individual requests, but to preserve a coherent architectural language amid numerous design revisions. Maintaining the clarity of the church's identity while integrating multiple stakeholder aspirations required careful judgment, patience, and continuous collaboration throughout the design process.

Ultimately, successful sacred architecture is rarely the product of one voice. It is the result of many voices finding harmony.

Designing Through Value Engineering

Every ambitious project eventually encounters the realities of construction economics.

Following the completion of the design development, the project underwent a comprehensive quantity surveying process. As detailed cost estimates were prepared, it became evident that the initial design exceeded the allocated construction budget. This marked the beginning of one of the most demanding phases of the project: value engineering.

Too often, value engineering is misunderstood as a process of simply reducing costs. In reality, effective value engineering is about protecting the essential design intent while identifying more efficient ways to achieve it.

For Maria Bunda Kita Catholic Church, every proposed adjustment required careful evaluation. Architectural features, façade materials, lighting systems, construction methods, and technical specifications were reviewed not only for their financial impact but also for their influence on the church's architectural character and worship experience.

For ALTA Integra, the challenge extended beyond selecting alternative lighting products. Every modification had the potential to affect the visual hierarchy of the façade, the perception of architectural depth, maintenance requirements, energy performance, and the symbolic narrative communicated through light. The objective was therefore not merely to reduce cost, but to preserve the emotional and spiritual qualities of the lighting design while responding responsibly to budget constraints.

This collaborative process demanded close coordination between the developer, architect, quantity surveyor, and engineering consultants. Through careful prioritization and technical refinement, the team sought solutions that balanced architectural ambition with construction practicality, ensuring that every design decision continued to serve the project's long-term vision.

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Conclusion: Where Architecture Becomes Light, and Light Becomes Faith

Sacred architecture has always been more than the art of constructing beautiful buildings. At its highest aspiration, it creates places where the physical world gently gives way to the spiritual—where stone, proportion, light, and silence work together to elevate the human experience beyond the ordinary.

The façade lighting design of Maria Bunda Kita Catholic Church embraces this timeless tradition while responding to the aspirations of a contemporary waterfront city. Rather than treating light as a decorative layer applied after the architecture is complete, ALTA Integra integrated illumination into the architectural narrative itself. Every lighting decision was guided by the desire to reveal the church's identity, celebrate its Gothic-inspired verticality, express the nurturing love embodied in Maria Bunda Kita, and establish a dignified nighttime presence that enriches both worship and the surrounding urban landscape.

Within the Ecopark multi-faith district of PIK2, the illuminated church becomes more than a recognizable landmark. It becomes a symbol of welcome, harmony, and hope—an enduring reminder that thoughtful design can strengthen not only the visual identity of a city but also the emotional and spiritual connection between people and place.

As the American architect Louis I. Kahn beautifully observed, "A great building must begin with the unmeasurable, must go through measurable means when it is being designed, and in the end must be unmeasurable." Sacred lighting follows the same philosophy. While it is engineered through calculations, simulations, and precise technical coordination, its greatest success lies in what cannot be quantified: the sense of peace, reverence, belonging, and inspiration experienced by every person who approaches the church after sunset.

Ultimately, the measure of this project is not found in the luminaires concealed within the architecture, but in the quiet moments they help create—moments when architecture speaks without words, and light gently guides the heart toward the sacred. This Church Lighting Design demonstrates how architectural lighting can strengthen liturgical experience while reinforcing the church's role as an urban landmark.

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Create Sacred Spaces That Inspire Generations

Every sacred building tells a story. Architecture gives that story its form, while light reveals its meaning.

As one of Indonesia's specialist Lighting Design consultancies, ALTA Integra collaborates with architects and developers to deliver integrated architectural lighting, sacred lighting, and special lighting solutions for projects throughout Indonesia and Southeast Asia.

At ALTA Integra, we believe that churches, cathedrals, temples, mosques, and other places of worship deserve more than functional illumination. Every sacred building deserves an environment where architecture, light, acoustics, and technology work together to deepen worship and enrich the spiritual experience. They deserve integrated building performance design that respects theology, enhances liturgy, celebrates architecture, and creates meaningful experiences for every worshipper.

Our multidisciplinary approach seamlessly integrates Worship Audiovisual & Livestream System Design, Sacred Architectural Lighting Design, Sacred Acoustics Design, Psychoacoustics, and Daylight & Visual Comfort Analysis to create immersive worship environments that engage both the senses and the spirit. Unified through our Human-Centered Building Performance methodology and aligned with LEED and WELL Building Standards, every solution balances spiritual experience, technical excellence, and sustainable building performance.

Working collaboratively with architects, religious institutions, developers, and project stakeholders, we transform complex technical systems into cohesive environments where worship, community, and architecture become one.

Whether you are planning a new cathedral, restoring a historic church, renovating a worship hall, or creating a contemporary sacred landmark, ALTA Integra is ready to help you shape spaces that inspire faith today and leave a meaningful legacy for generations to come.

Let's illuminate architecture with purpose, elevate worship through thoughtful design, and create sacred environments where every beam of light serves a higher calling.

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Project Information:

• Developer: Agung Sedayu Group

• Architect: Hawawinata & Associates

• Acoustic, Lighting & Audiovisual Consultant: ALTA Integra

• MEP: Mecosystech

• Structure: Grand Optima

Desain Akustik dan Audio Bangunan Bersejarah Gereja Katedral Makassar

Karena pertumbuhan di Gereja Katedral Makassar, pada tahun 2018 Pemimpin dan Dewan Gereja memutuskan untuk memperluas Bangunan Gereja Katedral Makassar yang bernama Gereja Hati Yesus Yang Mahakudus.

Tantangan dalam mendesain akustik dan audio pada Bangunan Tua yang penuh kenangan dan sejarah adalah bagaimana menerapkan Ilmu Pengetahuan dan Teknologi terkini yang dapat merawat kenangan masa lalu sambil memperkuat Karakteristik Bangunan tersebut.

Gereja Katedral Makassar penampakan pertama bergaya Neo-Gothic dibangun pada tahun 1898 oleh arsitek yang juga seorang perwira zeni yang bernama Swartbol, kemudian dilanjutkan oleh Fischer. Selesai dibangun pada tahun 1900 oleh kontraktor cina bernama Thio A Tek.

Tampilan Pertama Gereja Katedral Makassar bergaya Neo-Gothic (1900 - 1939)

Pada tahun 1939 Gereja Katedral Makassar diperbesar karena perkembangan jumlah jemaah yang semakin banyak dan kapasitas gereja sudah tidak memadai lagi dan selesai pada tahun 1941 dengan perubahaan arsitektur menjadi bergaya Art Deco.

Tampilan ke dua Gereja Katedral Makassar (1941-2018)

Dari tahun 1940 sampai tahun 2018 pertumbuhan umat katolik di gereja ini semakin banyak sehingga diputuskan untuk melakukan perluasan gereja agar dapat menampung jemaat lebih banyak lagi. Untuk itu panitia pembangunan gereja melakukan beauty contest untuk mencari desain terbaik bagi Gereja Katedral Makassar di masa mendatang.

Tampilan ke tiga Gereja Katedral Makassar (2024- now)

Liturgical Lighting Design for Worship Experience at Jakarta Cathedral

Project Overview

Since the Dutch colonial era, Jakarta Cathedral has stood as one of Indonesia's most important religious and cultural landmarks. Beyond its architectural significance, the cathedral continues to serve as an active place of worship, a symbol of religious harmony, and a spiritual home for generations of Catholics in Jakarta.

As part of the Jakarta Cathedral's ongoing commitment to preserving its heritage while enhancing the worship experience, a series of liturgical lighting scenario studies were conducted to evaluate how different lighting strategies influence the perception of sacred space, visual hierarchy, spiritual atmosphere, and liturgical symbolism.

The project explored how light can support various forms of worship, religious celebrations, and ceremonial occasions while respecting the architectural character and historical significance of the cathedral. Rather than focusing solely on illumination levels, the study examined how lighting shapes emotional response, spiritual engagement, and the relationship between worshippers and sacred architecture.

In Christian theology, light is often understood as a manifestation of God's presence, truth, and divine glory, while church architecture reflects the congregation's devotion and desire to glorify God through the built environment. The relationship between light and architecture therefore becomes an essential component in creating a meaningful worship environment where worshippers encounter the divine through faith, space, and sensory experience.

Through a series of lighting mock-ups and scenario evaluations, the project investigated how thoughtful lighting design can strengthen the connection between faith, architecture, and human experience within one of Indonesia's most significant religious heritage buildings.

Liturgical Lighting Scenario Gallery

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The Challenge

Lighting within sacred architecture serves a fundamentally different purpose from lighting in commercial, hospitality, or entertainment environments. The primary challenge was to create lighting scenarios that support both liturgical functions and spiritual experience while preserving the cathedral's architectural dignity and sacred atmosphere.

Several key considerations were identified:

• Supporting different liturgical celebrations and ceremonial occasions

• Strengthening visual hierarchy within the worship space

• Enhancing the perception of sacred art and architectural details

• Improving visual comfort for worshippers

• Reducing glare and visual distraction

• Balancing functional illumination with spiritual atmosphere

• Respecting the heritage value of the cathedral

• Old structure condition challenges for new installation

• Sustainability, electrical safety and long-term installation challenges

A successful liturgical lighting strategy must help worshippers focus on the meaning of the celebration rather than the lighting itself. The challenge therefore was not to make the space brighter, but to make the spiritual experience more meaningful through thoughtful use of light.

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Dramatic Architectural Lighting Scenario

Dramatic Architectural Lighting Scenario

Dramatic Architectural Lighting Scenario

Our Approach

Our approach began by understanding the cathedral as a sacred environment where light functions as both a practical and symbolic element. A series of lighting mock-ups, visual evaluations, and scenario studies were developed to explore how different lighting compositions influence worship experience, spatial perception, and liturgical expression.

The study evaluated:

• Visual hierarchy analysis

• Liturgical focal hierarchy and scenario development

• Architectural element assesment

• Heritage conservation review

• Light quality and color rendering evaluation

• Altar to congregation area contrast ratios studies

• Subject to ambient light contrast ratio studies

• Emotional and Spiritual atmosphere

• Existing electrical infrastructure assessment

• Existing lighting studies for reuse

Special attention was given to how light interacts with key liturgical elements such as the altar, tabernacle, crucifix, mural paintings, religious sculptures, and architectural details.

Rather than uniformly illuminating the entire space, the design explored how controlled luminance hierarchy and balanced contrast could guide attention toward the most significant liturgical elements while maintaining a contemplative atmosphere.

Human-Centered Light Perception Strategy

The project adopted a human-centered perceive lighting philosophy that prioritizes how worshippers emotionally, spiritually and visually experience sacred space. The strategy carefully considered how people: See, Focus to Altar, Reflect, Pray, Navigate and Participate in worship.

Research in environmental psychology demonstrates that light influences emotional perception, attention, comfort, and spatial understanding. Within sacred architecture, lighting can contribute significantly to feelings of reverence, contemplation, peace, and spiritual connection.

The Catholic Church celebrates a diverse range of liturgical practices and ceremonies, including the Stations of the Cross, Eucharistic Adoration, the Easter Vigil, and joyful Easter celebrations. Each liturgy carries a distinct spiritual meaning and emotional atmosphere that can be reinforced through carefully designed lighting environments.

Lighting that appropriately supports the liturgical context can enhance emotional engagement, deepen the sense of sacred presence, and strengthen the worshipper's spiritual connection and interaction with God. Rather than serving merely as illumination, light becomes an integral part of the liturgical experience, helping communicate symbolism, focus attention, and shape the emotional character of worship.

To explore these relationships, a series of eight liturgical lighting scenarios were tested at Jakarta Cathedral on 21 October 2024 using the Casambi lighting control system. The study evaluated how different lighting compositions, brightness levels, focal hierarchies, and atmospheric qualities influenced the perception of sacred space and supported various forms of worship and religious celebrations.

The lighting scenarios were therefore evaluated not only based on technical performance but also on their ability to support:

• Visual comfort

• Cognitive focus

• Emotional engagement

• Spiritual experience

• Architectural appreciation

• Sacred atmosphere

• Liturgical symbolism

By carefully controlling brightness, contrast, color rendering, and focal emphasis, the lighting helps create an environment that encourages reflection, participation, and a more meaningful worship experience.

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Regular Mass Lighting Scenario

Regular Mass Lighting Scenario

Regular Mass Lighting Scenario

Heritage Conservation and Lighting Integration Strategy

The project required close coordination between architectural heritage conservation, liturgical requirements, lighting technology, and human-centered design principles. The design process included:

• Existing Electrical Wiring Assessment to identify aging infrastructure, mitigate failure risks, and reduce potential short-circuit hazards.

• Reuse of Existing Lighting Infrastructure to improve sustainability, reduce material waste, and preserve the building's historical integrity.

• Lighting Mock-Up Testing and Evaluation to validate visual quality, liturgical atmosphere, and stakeholder expectations before implementation.

• Non-Invasive Luminaire Mounting Systems to protect the historic building fabric and comply with heritage conservation principles.

• Wireless Lighting Control System Implementation to eliminate the need for new control wiring and minimize physical intervention to the heritage structure.

• Integration of New and Existing Lighting Systems to maximize operational flexibility while preserving investment in existing infrastructure.

• Adaptive Lighting Scenario Programming to support multiple liturgical celebrations, ceremonial events, and worship experiences.

• Energy-Efficient Lighting Upgrades to improve lighting quality while reducing energy consumption and long-term operational costs.

• Glare and Light Pollution Management to enhance visual comfort and minimize environmental impact.

• Thermal Impact Assessment to ensure lighting fixtures do not introduce excessive heat that could damage sensitive heritage materials.Particular attention was given to ensuring that lighting supports the liturgy while remaining respectful to the cathedral's historic architecture.

These strategies demonstrate how thoughtful lighting design can successfully bridge heritage conservation and modern lighting technology implementation ensuring that Jakarta Cathedral continues to inspire faith, community, and cultural appreciation for generations to come.

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Contemplative and Adoration Lighting Scenario

Contemplative and Adoration Lighting Scenario

Contemplative and Adoration Lighting Scenario

Outcome

The liturgical lighting scenario testing and commissioning demonstrated how different lighting strategies create distinctly different perceptions of sacred space, emotional and spiritural atmosphere, and worship experience. This case study established a framework for evaluating future lighting interventions based on both technical performance and human-centered outcomes. Key benefits include of this project:

• Improved visual hierarchy

• Enhanced worship experience

• Stronger liturgical focus

• Better visual comfort

• Reduced glare perception

• Greater appreciation of sacred art and architecture

• More meaningful spiritual atmosphere

Most importantly, the project demonstrates that successful church lighting is not measured by brightness alone. Instead, effective liturgical lighting helps people connect more deeply with worship, architecture, and the spiritual significance of the space.

Through thoughtful integration of lighting design, heritage conservation, and human-centered principles, Jakarta Cathedral continues its mission of preserving its cultural legacy while enriching the experience of future generations of worshippers and Jakarta tourism.

Conclusion

The liturgical lighting scenario study at Jakarta Cathedral demonstrates that lighting in sacred architecture is far more than a technical requirement for visibility. Thoughtfully designed lighting can shape emotional perception, strengthen spiritual engagement, support liturgical symbolism, and enhance the relationship between worshippers and sacred space.

By carefully balancing liturgical requirements, human-centered experience, architectural heritage, and lighting performance, the project illustrates how light can become an integral part of worship itself. Through different lighting scenarios, the cathedral can create atmospheres that support reflection, prayer, celebration, contemplation, and communal worship while preserving the dignity and historical significance of one of Indonesia's most important religious landmarks.

The study reinforces the belief that successful lighting design is not measured solely by brightness, but by its ability to communicate meaning, evoke emotion, and enrich the human experience within the built environment.

ALTA Integra is a Building Science and Technology consultancy dedicated to creating human-centered environments through evidence-based design. By studying the relationship between light, sound, space, technology, and human emotion, we help transform buildings into places that inspire wellbeing, strengthen identity, emotional support space, and dedicated for a more sustainable future.

Whether you are designing a place of worship, heritage building, hospitality destination, workplace, educational facility, or public space, our lighting consultancy services help translate design vision into meaningful visual, emotional, and environmental performance.

Before After Lighting Design Jakarta Cathedral Heritage and Worship Lighting Transformation

At ALTA Integra, we believe that lighting within sacred architecture should do more than provide visibility. It should reveal architectural beauty, support spiritual experience, and strengthen the emotional connection between people and place.

The comparison between the existing and redesigned lighting at Jakarta Cathedral demonstrates how lighting quality influences the way architecture is perceived and experienced. While the original lighting relied primarily on bright point sources that created glare and visual distraction, the redesigned approach focuses on luminance balance, visual hierarchy, architectural emphasis, and human comfort.

By carefully illuminating the cathedral's historic murals, architectural rhythm, and timber ceiling, the lighting transforms the worship environment from a visually functional space into a more contemplative and spiritually immersive experience. The result is not simply a brighter cathedral, but a more meaningful one—where light supports prayer, reinforces sacred symbolism, and reveals the architectural heritage of one of Indonesia's most significant religious landmarks.

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WEST VIEW REGULAR MASS SCENARIO

West View Before Lighting Design

Visual Perception

The existing lighting appears bright in isolated areas but dark throughout much of the worship space. The eye is immediately drawn toward multiple exposed luminaires rather than the architecture itself.

Key Lighting Characteristics

Excessive Glare

• High-intensity point sources create visible glare and starburst effects.

• Luminaires become visual focal points instead of the architectural space.

• Visual comfort is reduced, particularly during extended worship activities.

Poor Visual Hierarchy

• Multiple bright points compete for attention.

• No clear progression of visual focus through the nave.

• Architectural elements such as murals, columns, and timber ceiling are not effectively accentuated.

Flat Architectural Perception

• Gothic proportions and verticality are difficult to perceive.

• Ceiling volume appears visually disconnected from the worship space.

• Limited perception of spatial depth and grandeur.

Uneven Luminance Distribution

• Bright hotspots adjacent to dark areas create visual imbalance.

• Human adaptation shifts continuously between bright and dark zones.

• Sacred artwork becomes less discernible.

Emotional Experience: the atmosphere feels and visually busy. while the lighting provide enough brightness for visibility, it does little to create a sense of reflection or emotional connection. As a result, the atmosphere feels less immersive and does not fully support the spiritual character of the space.

West View After Lighting Design

Visual Perception

The redesigned lighting shifts focus from the luminaires to the architecture. Light is no longer perceived as individual fixtures but as an integrated part of the sacred environment.

Key Lighting Characteristics

Glare-Controlled Environment

• Light sources are visually discreet.

• Architectural surfaces become the primary visual experience.

• Improved visual comfort for worshippers.

Strong Visual Hierarchy

• The central aisle naturally guides movement and attention.

• Architectural rhythm is clearly articulated.

• The rose window and rear liturgical elements become meaningful focal points.

Enhanced Architectural Legibility

• The cathedral's scale and proportions are revealed.

• Vertical columns gain definition and depth.

• The timber ceiling becomes a celebrated architectural feature.

Balanced Luminance Distribution

• Smooth transitions between light and shadow.

• Improved adaptation across the visual field.

• Greater perception of depth and volume.

Improved Material Rendering

• Warm timber surfaces reveal texture and craftsmanship.

• Murals become more visible and expressive.

• Historic architectural details gain visual prominence.

Emotional Experience: the atmosphere feels calm, sacred and contemplative. The lighting enhances the sense of spacious and elegance, creating a more spiritually engaging environment. Compare to existing lighting condition, the new lighting design better supports the emotional and spiritual character of worship.

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EAST VIEW FROM BALCONY

Altar View Before Lighting Design

Limited Architectural Hierarchy

The existing lighting primarily illuminates horizontal surfaces and circulation areas, while the cathedral's most significant architectural feature—the timber vaulted ceiling—remains largely concealed in darkness.

The result is a more limited architectural presence. The cathedral’s vertical scale is diminished. Gothic proportions are difficult to perceive, the spatial volume appears compressed and architectural rhythm is visually weakened.

Focal Competition

The altar is illuminated, but the surrounding architecture contributes little to the visual narrative. The eye is drawn toward isolated bright elements rather than experiencing a coherent sequence of architectural focal points.

Reduced Spatial Depth

The nave, columns, ceiling vaults, and upper architectural elements merge into dark background surfaces. This reduces depth perception, spatial layering, architectural legibility, sense of grandeur. Emotional Perception the atmosphere feels: functional, quiet, dimly illuminated, and architecturally under-expressed. The lighting supports worship activities but does not fully communicate the beauty and significance of the sacred architecture.

Altar View After Lighting Design

Revealing Architectural Identity

The redesigned lighting establishes the timber ceiling as a primary architectural feature. Carefully controlled uplighting reveals: vault geometry, material texture, structural rhythm and architectural craftsmanship. The ceiling becomes part of the worship experience rather than disappearing into darkness.

Improved Visual Hierarchy

The lighting now creates multiple layers of visual interest:

1. Altar and sanctuary

2. Vertical columns

3. Timber vaults

4. Nave and circulation areas

This hierarchy naturally guides attention through the space.

Enhanced Spatial Depth

The relationship between foreground, midground, and background becomes significantly more legible. The eye can now appreciate: Verticality, Depth, Architectural scale and Sacred procession toward the altar.

Better Luminance Distribution

The lighting is distributed more evenly throughout the architectural volume. Instead of isolated bright surfaces, the cathedral feels visually connected as a single spatial experience. Material Expression: The warm timber ceiling gains richness and texture.

The contrast between: Timber vaults, Stone columns and White wall surfaces creates greater visual depth and architectural clarity.

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VIA DOLOROSA COLUMN VIEW

Via Dolorosa View Before Lighting Design

Lighting Quality Assessment

In the existing condition, a high-intensity luminaire is positioned within the field of view, becoming the brightest object in the scene.

Excessive Glare

From the mobile phone camera we can see the luminaire creates: direct glare, disability glare, lens flare and visual discomfort. Rather than appreciating the architecture, visitors are immediately drawn toward the light source itself.

Poor Visual Hierarchy

The brightest element is not the architecture, the mural, the column capitals and the gothic arch. Instead, attention is unintentionally captured by the exposed fixture.

Architectural Compression

The upper vaults and timber ceiling disappear into darkness. As a result: verticality is diminished, architectural scale feels smaller, spatial depth is reduced and the richness of the Gothic detailing is difficult to perceive.

Limited Material Expression

The architectural surfaces appear flat and visually disconnected. Important details such as: capitals, arches, moldings, vault geometry receive minimal visual emphasis.

Via Dolorosa View After Lighting Design

Lighting Quality Assessment

The redesigned lighting strategy fundamentally changes how the architecture is experienced.

Glare-Controlled Environment

The luminaires are no longer the visual focus. Instead: Architectural surfaces become illuminated. Light sources visually recede. Visual comfort is significantly improved.

The visitor perceives architecture rather than equipment. Enhanced Architectural Legibility. The lighting reveals: gothic arches, vault geometry, column proportions and historic detailing.

The architecture becomes readable as a complete composition.

Strong Vertical Emphasis. Light is carefully distributed along: columns, capitals, arches and timber vaults. This strengthens the perception of height and grandeur.

Improved Material Rendering

The timber ceiling becomes a dominant architectural feature. Warm illumination reveals: texture, craftsmanship and material richness. The contrast between wood, plaster, and decorative artwork becomes more pronounced and visually engaging.

Integration of Art and Architecture

The mural gains greater visibility and becomes integrated within the overall architectural composition. Rather than appearing as an isolated artwork, it becomes part of the spatial narrative.

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West View Contemplative Scenario

West View - Contemplative Scenario Before Lighting Design

Functional Visibility, Limited Spiritual Atmosphere

In the before lighting condition, the space relies heavily on exposed bright luminaires positioned along the nave and clerestory levels.

Glare-Dominated Environment

• Multiple visible light sources create intense brightness contrasts.

• The eye is repeatedly attracted to the luminaires themselves.

• Starburst effects generate visual distraction.

Reduced Visual Comfort

• High luminance sources cause continuous visual adaptation.

• Long periods of worship may result in visual fatigue.

Compressed Spatial Perception

• The vaulted timber ceiling remains largely hidden in darkness.

• The cathedral's verticality and grandeur are difficult to perceive.

Limited Architectural Legibility

• Murals, columns, and heritage details become secondary elements.

• The architecture serves primarily as a backdrop rather than an active participant in the worship experience.

Spiritual Perception

The space feels: functional, dimly illuminated, visually fragmented, less immersive and less contemplative. While sufficient for visibility, the lighting contributes little to the emotional and spiritual narrative of the cathedral.

Worship Through Light

The redesigned lighting (bottom image) takes a fundamentally different approach.

Instead of illuminating the space uniformly, the design carefully shapes how worshippers perceive architecture, symbolism, and sacred space.

Reduced Glare and Improved Comfort

• Direct visibility of luminaires is minimized.

• Architectural surfaces become the primary visual focus.

• The eye can comfortably explore the space.

Revealed Architectural Volume

• The timber vaults become visible and expressive.

• The rhythm of the Gothic arches is clearly articulated.

• The cathedral's vertical dimension becomes part of the experience.

Enhanced Visual Hierarchy

• The central aisle naturally guides the eye.

• Murals gain greater prominence and legibility.

• Architectural elements support the spiritual journey toward the sanctuary.

Balanced Light and Shadow

• Darkness is preserved where appropriate.

• Contrast is controlled rather than eliminated.

• Spatial depth and mystery are maintained.

Spiritual Perception

Now the atmosphere now feels: sacred, calm, reverent, intimate, contemplative and emotionally engaging. The cathedral becomes a place that invites reflection rather than simply accommodating occupancy.

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ALTAR LIGHTING

The comparison between the before and the after altar lighting demonstrates how lighting strategy fundamentally influences the perception of sacred architecture, emotional atmosphere, and spiritual focus within the church interior. Although both scenes illuminate the same altar, the difference in luminance balance, visual hierarchy, and ambient control produces entirely different spatial and emotional experiences.

Existing Altar Lighting

Bright but Visually Flat

In the existing lighting condition, the church interior appears generally bright due to high ambient illumination distributed relatively evenly throughout the sanctuary. While the increased brightness improves overall visibility, the lighting lacks: Strong visual hierarchy, Spatial depth, Focal emphasis, Emotional layering and Architectural contrast.

As a result, the altar competes visually with the surrounding walls, floor, banners, and architectural surfaces instead of emerging as the primary sacred focal point. The lighting perception feels: Visually flat, Overly uniform, Spatially shallow, Visually noisy, Less contemplative and Less emotionally immersive.

Although the space appears brightly illuminated, the lighting lacks visual hierarchy and spatial depth. The excessive brightness creates a visually noisy environment that diminishes the sense of serenity, contemplation, and sacred atmosphere within the church interior.

Mock Up Altar Lighting

Layered Hierarchy and Sacred Atmosphere

The mock-up lighting adopts a more intentional and human-centered lighting strategy by reducing unnecessary ambient brightness and strengthening focal illumination around the altar composition. Rather than uniformly illuminating the entire sanctuary, the lighting carefully guides visual attention toward the liturgical center through: Controlled luminance hierarchy, Reduced ambient spill, Focused altar illumination, Balanced shadow retention and Improved contrast layering.

This approach allows the altar to visually emerge from the surrounding architecture, creating stronger depth perception and a more contemplative sacred atmosphere. The lighting perception now feels: Warmer and calmer, More intimate, More spiritually engaging, Richer in spatial depth, More visually organized and More emotionally immersive.

The mock up lighting creates a warmer and more contemplative atmosphere with improved visual depth and hierarchy. By reducing excessive ambient brightness and emphasizing focal illumination around the altar, the space feels calmer, more intimate, and spiritually engaging.

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Face and Tabernacle

Photo of Father Hani Rudi SJ

Before Lighting Design (Left)

Limited Facial Recognition

In the existing lighting condition, excessive brightness from the altar backdrop creates an unbalanced visual hierarchy, causing the priest's face to appear partially dark and reducing facial recognition, emotional connection, and liturgical communication with the congregation. Several issues are visible: Facial features are difficult to distinguish, Eyes and expressions are not clearly perceived, Reduced visual connection between priest and congregation, Lower emotional engagement during liturgical celebrations.

In worship environments, facial expressions play an important role in communication, empathy, and participation. When faces are poorly illuminated, the congregation loses an important part of the liturgical experience.

Uneven Tabernacle and Crucifix Illumination

The altar backdrop appears bright in isolated areas but lacks balance. Observations include: Excessive brightness and reflective glare around some decorative elements, Reduced visibility of carved details, Limited tonal separation between foreground and background, Important symbolic elements visually compete with one another. The crucifix remains visible, but its prominence is weakened by surrounding brightness and inconsistent contrast.

Reduced Color and Material Perception

The existing lighting struggles to reveal: wood grain textures, carved craftsmanship, material depth and artistic details. As a result, much of the cathedral's heritage craftsmanship becomes visually flattened.

Enhanced Lighting Strategy (Right)

Improved Facial Rendering

One of the most noticeable improvements is the visibility of the celebrant. The upgraded lighting provides: Better facial modeling, More natural skin tones, Improved visibility of expressions, and Stronger visual connection between clergy and congregation. The priest becomes easier to see without appearing overlit. This is particularly important in large cathedrals where worshippers may be seated far from the sanctuary.

Enhanced Crucifix and Tabernacle Hierarchy

The lighting establishes a clear visual hierarchy: Priest, Crucifix , Tabernacle, religious artwork and architectural background. The eye naturally understands where to focus. The priest and crucifix becomes the dominant spiritual focal point while remaining visually integrated within the historic altar composition.

Superior Rendering of Religious Artwork

The improved lighting reveals: sculptural details, carved figures, decorative ornamentation and historical craftsmanship. The altar is no longer perceived as a dark background but as a rich visual narrative supporting worship.

Improved Color Rendering

The enhanced lighting allows worshippers to appreciate: liturgical vestments, natural skin tones, wood finishes, and sacred artwork. Colors appear warmer, richer, and more authentic. This contributes to a more emotionally engaging worship experience.

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Lighting Design Outcome

At ALTA Integra, we believe that lighting within sacred architecture should do far more than provide visibility. Light has the power to shape perception, influence emotion, reinforce spiritual symbolism, and deepen the relationship between people and place.

Our work at Jakarta Cathedral explored how lighting quality influences the worship experience through the careful integration of visual comfort, architectural perception, and spiritual atmosphere. Rather than simply increasing brightness, the design focused on reducing glare, improving visual hierarchy, revealing architectural craftsmanship, enhancing facial and artwork visibility, and creating a more contemplative environment for prayer and reflection.

Guided by principles of human-centered building performance, the project investigated how worshippers perceive architecture, liturgical elements, and sacred rituals through light. By balancing luminance, contrast, color rendering, and focal emphasis, the lighting strategy strengthens the visual connection between congregation, clergy, sacred symbols, and the cathedral's historic architecture.

The transformation demonstrates how evidence-based lighting design can elevate both the functional and emotional performance of sacred spaces. Through a deeper understanding of the relationship between visual perception, architecture, emotion, and spirituality, lighting becomes more than a technical system—it becomes a medium for enhancing worship, revealing heritage, and creating meaningful human experiences.

This project reflects ALTA Integra's multidisciplinary approach to integrating building science, lighting design, and human-centered environmental strategies to create places that are not only visually effective, but emotionally meaningful, spiritually engaging, and culturally enduring.

Project Information

• Project: Jakarta Cathedral Architectural Lighting

• Location: Jakarta, Indonesia

• Service: Sacred and Heritage Architectural Lighting Design

• Scope: Visual Evaluation, Lighting Quality Assessment

• Consultant: Herwin Gunawan / ALTA Integra

• Year: 2024

Sacred Architectural Lighting Mock-Up Study for Jakarta Cathedral

Lighting within sacred architecture is not merely about visibility. It is about shaping spiritual atmosphere, emotional perception, and the relationship between human experience and sacred space.

With great enthusiasm in welcoming the Apostolic Visit of Pope Francis to Jakarta Cathedral in September 2024, Herwin Gunawan and ALTA Integra Lighting Design team contributed to enhancing the interior lighting quality of the historic cathedral through a series of architectural lighting mock-up studies.

The mock-up lighting study was developed to explore how different lighting strategies can influence visual hierarchy, contemplative ambience, architectural depth, and the perception of religious art and liturgical elements within the cathedral interior.

Rather than focusing solely on brightness, the study investigated how controlled contrast, color rendering quality, luminance balance, and focal illumination could create a more human-centered and spiritually immersive worship environment.

Through a series of lighting mock-ups and visual evaluations, the project examined how light can respectfully reveal the architectural richness, sacred symbolism, and emotional atmosphere of one of Indonesia’s most important religious heritage buildings.

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Altar Main Table

Michael Ho from ERCO Singapore assisting Jakarta Cathedral during the lighting mock-up process, testing luminaire positioning, beam angles, and lighting quality to evaluate architectural perception, visual comfort, and worship experience within the historic cathedral interior.

A comparative mock-up evaluation was conducted between the proposed ERCO lighting solution (left) and the existing lighting system (right). Using a professional spectrometer, the assessment measured illuminance (lux), correlated color temperature (CCT), and color rendering quality (CRI) to understand how different lighting technologies influence visual perception and worship experience.

The results showed that the ERCO lighting achieved a higher illuminance level (736 lux vs. 389 lux) while maintaining a warm color temperature and superior color rendering performance (CRI 90 vs. CRI 82). This improvement allows priest face expression, architectural details, religious artwork, and liturgical elements to be perceived more naturally and accurately.

Flicker measurements were conducted to compare the performance of the existing lighting system and the proposed ERCO lighting solution. Flicker is an important lighting quality parameter that can affect visual comfort, concentration, camera recording quality, and the overall worship experience.

The measurement results showed that the existing lighting system exhibited a 14.31% flicker level, while the proposed ERCO lighting achieved a significantly lower 7.44% flicker level, representing nearly a 48% reduction in flicker. This improvement contributes to a more stable visual environment, reducing the risk of visual fatigue and discomfort during extended worship activities.

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Tabernacle Lighting Mock Up

The comparison between the two lighting approaches demonstrates how lighting strategy significantly influences the visual perception, emotional atmosphere, and spiritual experience of the church tabernacle. Although both scenes illuminate the same sacred architectural object, the difference in lighting composition creates entirely different spatial qualities and emotional responses.

Existing Lighting - small spotlight create glare spot and exesive dart spot

Existing Tabernacle Lighting Strategy

Multiple Small Spotlights with Fragmented Illumination

The existing tabernacle is illuminated using multiple small spotlight sources with narrow beam distributions. While this strategy increases localized brightness, it also creates: excessive reflective glare, fragmented illumination, harsh bright-dark transitions, visual clutter, uneven brightness distribution and no focal points.

The multiple bright hotspots generate a visually busy environment where the eye continuously shifts between isolated illuminated areas rather than perceiving the altar composition as a unified sacred focal point. The lighting perception feels: overly contrasty, fragmented, visually loud and noisy, less calm and less spiritually immersive.

The narrow beam spotlights also create excessive dark pockets between illuminated surfaces, causing the sculptural narratives and architectural carvings to appear disconnected from one another. Although dramatic, the lighting lacks overall compositional harmony and reduces the contemplative quality expected within sacred architecture.

Mock Up Testing - Reveal Golden Color and Visual Hierarchy

Mock Up Tabernacle Lighting

Layered and Hierarchical Illumination

The mock up lighting strategy shifts toward a more integrated and layered composition with improved visual hierarchy and controlled luminance balance. The mock-up lighting creates a more refined and cohesive sacred atmosphere by revealing the natural golden warmth and material richness of the historic altar architecture.

This strategy creates: stronger visual hierarchy, better luminance balance, reduced glare perception, improved spatial continuity, greater visual depth, enhanced sacred atmosphere and reveal the golden color paint.

The crucifix becomes the primary spiritual focal point, while the surrounding relief sculptures and ornamental carvings remain visually connected without competing excessively for attention. The lighting perception now feels: more sacred and contemplative, more visually organized, richer in depth and texture, more emotionally immersive, calmer and more reverent

Rather than fragmented the tabernacle composition, the lighting now creates layered depth and gentle contrast that guide the eye naturally through the altar narrative. The result is a lighting environment that feels more harmonious, contemplative, and emotionally immersive while maintaining appropriate visual focus and reverence within the sacred space.

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Subject to Background Light Ratio

The lighting study explores how subject-to-background illumination ratio influences visual perception, emotional atmosphere, and spatial hierarchy within a sacred architectural environment.

Rather than relying solely on overall brightness, the design approach evaluates how controlled contrast between the subject and background can shape focus, depth perception, and human emotional response.

Subject to Background High Contrast Ratio

Stronger Focus and Dramatic Emphasis

In the high contrast lighting, the lighting composition applies a higher subject-to-background contrast ratio by reducing background illumination and increasing visual separation between the speaker and surrounding architecture.

This strategy creates:

• Stronger visual focus on the subject

• Greater sense of depth

• More dramatic atmosphere

• Reduced background distraction

• Enhanced subject prominence

Subject - Background Illumination Ratio - High Contrast

The darker background allows the human figure to emerge more clearly from the space, improving visual hierarchy and directing audience attention more intentionally toward the speaker. The lighting perception feels: More intimate, More cinematic, More emotionally focused, More visually dramatic and More contemplative.

This approach is particularly effective for: Camera-focused communication settings, Recorded presentations, Broadcast environments, Emotional or reflective moments and Dramatic or Contemplative Sermons storytelling,

Subject to Background Medium Contrast Ratio

Balanced Visibility and Spatial Integration

In Medium Contrast Ratio Lighting, the lighting composition applies a medium subject-to-background contrast ratio, where both the subject and altar background remain visibly connected within the visual field. This approach creates: Softer visual transition, Balanced spatial perception, Comfortable facial visibility, Natural skin tone rendering and Greater contextual awareness of the architectural background.

Subject - Background Illumination Ratio - Medium Contrast

The medium contrast ratio allows the speaker to remain visually dominant while maintaining the sacred altar as an important spatial backdrop. The lighting perception feels: Warm and approachable, Spatially balanced, Calm and conversational and Architecturally integrated.

This lighting condition is suitable for: Religious talks, Community interaction, Hybrid worship streaming, Educational or pastoral communication and Situations requiring both subject clarity and environmental context.

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Via Crucis Mural Paint by Theo Molkenboer

The lighting study demonstrates how color rendering quality and illumination level significantly influence the visual perception, emotional atmosphere, and artistic readability of the Via Crucis mural painting by Theo Molkenboer.

Rather than functioning solely as illumination, the lighting becomes a medium for revealing artistic detail, material color richness, and spiritual narrative within the sacred artwork.

Existing Lighting - Low Color Rendering Index - Low Lux Level

Existing Lighting Mural Painting

Low Color Rendering Index — Low Lux Level

The existing lighting condition produces limited visual clarity due to insufficient illumination level and poor color rendering quality.

The mural appears:

• Dim and visually compressed

• Lacking tonal separation

• Low in material richness

• Reduced in artistic legibility

• Flat in color perception

• Visually muted and less emotionally engaging

The low Color Rendering Index (CRI) reduces the ability of the lighting to accurately reveal the original pigments, textures, and chromatic nuances of the artwork.

As a result:

• Skin tones appear dull

• Warm color layers become muddy

• Fine artistic details are lost

• Depth and dimensionality are weakened

• The mural narrative becomes less visually expressive

The low lux level further diminishes the mural’s visual prominence within the sacred interior, causing the artwork to recede into darkness rather than serving as an important spiritual and artistic focal point.

The overall perception feels:

• Dark and visually subdued

• Less inviting

• Less emotionally immersive

• Less connected to the sacred storytelling intention of the artwork

Erco Mock Up Lighting - Higher Color Rendering Index - Higher Lux Level

Mock Up Lighting Mural Painting

Higher Color Rendering Index — Higher Lux Level

In the lower image, the improved lighting condition significantly enhances the visual and emotional perception of the mural through higher CRI illumination and increased, yet controlled, lux levels.

The lighting now reveals:

• Richer color fidelity

• Greater tonal separation

• Improved material texture

• Enhanced artistic detail

• Better visual hierarchy

• Stronger narrative readability

The higher CRI lighting restores the warmth and complexity of the original mural palette, allowing:

• Skin tones to appear more natural

• Gold and earth-tone pigments to emerge more vividly

• Fine brushwork and texture to become visible

• Visual depth and layering to feel more dimensional

The increased illumination level improves visibility while maintaining a warm and contemplative sacred atmosphere.

Rather than appearing flat or faded, the mural now becomes:

• More visually alive

• More emotionally engaging

• More spiritually expressive

• More architecturally integrated within the church interior

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Lighting Mock-Up on vault balcony

Lighting Projection Mock-Up for the Memorial Plaque in the Foyer of Jakarta Cathedral

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What is sacred architectural lighting concept?

The mock-up lighting study demonstrates that lighting quality within sacred architecture cannot be measured only by illumination level alone.

Different lighting strategies create fundamentally different perceptions of atmosphere, spirituality, emotional comfort, and architectural experience. Through careful control of luminance hierarchy, color rendering, contrast, and visual focus, lighting becomes more than technical illumination — it becomes an instrument for contemplation, reverence, and human connection.

For historic religious spaces such as Jakarta Cathedral, sensitive lighting design plays an important role in preserving not only architectural heritage, but also the emotional and spiritual qualities experienced by worshippers and visitors.

This study reflects a broader human-centered lighting approach where light is designed not to dominate the space, but to quietly support sacred atmosphere, visual comfort, and meaningful spiritual experience.

Project Information

• Project: Jakarta Cathedral Architectural Lighting

• Location: Jakarta, Indonesia

• Service: Sacred and Heritage Architectural Lighting Design

• Scope: Lighting Mock-Up, Visual Evaluation, Lighting Quality Assessment

• Consultant: Herwin Gunawan / ALTA Integra

• Year: 2024

Sacred Heritage Lighting Design Process Jakarta Cathedral Church

Lighting a historical place of worship requires a deep respect for historical architecture, religious liturgy, and structural preservation. This case study details the meticulous, data-driven lighting design process utilized to revitalize the interior of the iconic Neo-Gothic Jakarta Cathedral.

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Phase 1

Architectural Heritage Study

Liturgical Study

Existing Lighting Quality Assesment

Before introducing new fixtures, a comprehensive empirical audit of the existing lighting environment is mandatory to safeguard the building's heritage status.

Spectral & Illuminance Testing: Utilizing advanced diagnostic tools (such as UPRtek spectrometer technology), we mapped the ambient light levels and color rendering indices across the nave and sanctuary.

Data Findings: Initial assessments captured a baseline light level of 44.0 lux at the pew level, with highly uneven intensity distribution (ranging from 25% to 46% efficiency across different zones).

Identifying Deficiencies: The high contrast and dark voids in the upper vaults detracted from the cathedral's majestic Neo-Gothic verticality, while inadequate task lighting compromised the readability of liturgical texts.

Heritage Preservation Focus: High UV and heat-emitting legacy bulbs were flagged for replacement to protect centuries-old woodwork, paintings, and sacred artifacts from photochemical degradation.

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Phase 2

Conceptual Lighting Design

3D Lighting Simulation & Digital Twin Mapping

To guarantee structural safety and visual accuracy before any physical installation begins, a digital twin of the Jakarta Cathedral was engineered.

Quantitative False-Color Analysis

Using specialized lighting simulation software, the cathedral's interior was modeled to calculate exact lux distribution, glare ratings, and surface reflectance. The false-color rendering allows stakeholders to visualize precisely how light behaves along the complex ribbed vaults and pointed arches.

Qualitative Material Rendering

Simultaneously, a 3D gray-scale rendering was generated to study the interplay of light and shadow (chiaroscuro), ensuring the architectural integrity and depth of the stone and timber pillars are enhanced, not flattened, by the new scheme.

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Phase 3

Conceptual 2D Wireframe

Structural Integration

A core challenge of heritage conservation is hiding modern technology within historic architecture without altering the physical fabric of the building.

• Non-Invasive Luminaire Placement: The 2D wireframe schematic illustrates the precise positioning of architectural uplights nestled into the capitals of the columns.

• Accentuating the Architecture: By grazing the faces of the pointed arches with warm, directional light, the design draws the eyes upward, celebrating the structural engineering of the cathedral.

• Reversible Design Principle: In adherence to strict international conservation standards, all lighting mounts and pathways are designed to be completely reversible, leaving zero permanent damage to the historic brick and stone.

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Phase 4

The Final Ambiance

Harmonizing Liturgy and Light

The ultimate goal of the design is to foster a serene, contemplative atmosphere that elevates the spiritual experience for the congregation.

Layered Lighting Scheme:

Ambient Layer: Soft, warm-toned illumination reflecting off the ceiling vaults to provide comfortable, glare-free general lighting.

Accent Layer: High-CRI (Color Rendering Index) directional spotlights dedicated to the Stations of the Cross, altars, and sacred oil paintings, bringing out their true colors and textures.

Task Layer: Focused, dimmable illumination targeted precisely at the pews and sanctuary for reading scripts and hymnals.

Smart Liturgical Control: The entire system is integrated into a digital control framework, allowing church staff to transition effortlessly between various scenes—ranging from intimate daily masses to brightly illuminated festive celebrations like Christmas and Easter.

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Project Information

• Project: Jakarta Cathedral Architectural Lighting

• Location: Jakarta, Indonesia

• Service: Sacred and Heritage Architectural Lighting Design

• Scope: Lighting Mock-Up, Visual Evaluation, Lighting Quality Assessment

• Consultant: Herwin Gunawan / ALTA Integra

• Year: 2024

Audio System Design: Indigo Lagoi Bintan Resort

Audiovisual System Design SugarBeats Beach Club Indigo Lagoi Bintan Resort

Net Zero Energy Building Modeling: EVHO Living Singapore

EVHO Living is an Italian Architecture Services with Alessandro Lo Guidice and Sandro Giorgio. Together with EVHO Living, ALTA Integra design a net zero energy building house in Nemesu Area Singapore. This house has an excellent acoustic dan thermal comfort.

Auditorium Mandiri University - Audiovisual Acoustic Lighting Design Integration

High Performance Audiovisual Seamless Integration

Effective Learning Space for Zoom Meeting, Video Conference, Multimedia Presentation, Live Streaming, and Live Music for Higher Education Environment

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Project Overview

The auditorium at Mandiri University was envisioned as a multifunctional academic and institutional gathering space capable of supporting lectures, seminars, conferences, presentations, performances, and hybrid learning activities within a contemporary higher education environment.

To support these diverse functions, the project required an integrated approach combining audiovisual system, architectural acoustics and lighting design planning to create a comfortable, flexible, and technologically adaptive auditorium experience.

The consultancy scope focused on developing a performance-driven environment that enhances speech intelligibility, visual comfort, communication quality, and overall audience experience while maintaining architectural coherence and operational flexibility.

The Challenge

Modern university auditoriums are increasingly expected to support multiple event typologies within a single space.

The project presented several key challenges:

• Maintaining speech clarity across varying occupancy conditions

• Supporting both live and hybrid presentation formats

• Balancing acoustic control with architectural aesthetics

• Managing lighting conditions for audience comfort and camera visibility

• Integrating audiovisual infrastructure without disrupting interior architecture

• Ensuring flexibility for educational, ceremonial, and multimedia events

Unlike conventional lecture halls, multifunction auditoriums require careful coordination between sound, light, visual communication, and spatial perception to create an environment that performs effectively for both in-person and digital audiences.

The project also required balancing technical performance with long-term operational usability and maintenance efficiency.

Our Approach - Define Acoustic & Lighting Performance

Our approach began by understanding the auditorium as a human-centered communication environment rather than simply a technical event space.

The design strategy integrated:

• Architectural acoustic analysis

• Lighting quality evaluation

• Audiovisual system coordination

• Spatial communication hierarchy

• User experience considerations

Rather than treating acoustics, lighting, and AV systems as separate disciplines, the project developed these components as interconnected layers influencing audience perception, communication clarity, and spatial comfort.

The acoustic strategy focused on improving:

• Speech intelligibility

• Reverberation control

• Audience listening comfort

• Noise management

• Spatial sound consistency

The lighting approach prioritized:

• Visual hierarchy

• Audience comfort

• Presenter visibility

• Camera-friendly illumination

• Flexible scene control

Meanwhile, the audiovisual system was designed to support:

• Hybrid learning environments

• Digital presentations

• Multimedia events

• Scalable communication infrastructure

• Integrated operational control

Human-Centered Performance Strategy

The project adopted a human-centered performance strategy where environmental quality was measured not only through technical specifications, but through human perception and communication effectiveness.

The design considered how people:

• Listen

• See

• Focus

• Communicate

• Interact within the auditorium environment

The acoustic environment was calibrated to reduce listening fatigue and improve speech clarity across audience seating areas.

Lighting design was carefully balanced to support:

• Comfortable facial visibility

• Reduced glare

• Visual adaptation

• Audience engagement

• Camera and broadcast performance

The audiovisual strategy focused on creating intuitive and seamless communication experiences for lecturers, speakers, students, and hybrid participants.

By integrating environmental comfort with technological functionality, the auditorium becomes more than a presentation venue — it becomes a high-performance educational communication space.

Design Integration

A key aspect of the project was multidisciplinary coordination between architecture, acoustics, lighting, and audiovisual technology.

The integration process included:

• Acoustic simulation and material evaluation

• Lighting scene and luminance hierarchy studies

• Audiovisual infrastructure planning

• Display visibility analysis

• Spatial coordination with architectural elements

• Equipment integration within interior design

Careful integration ensured that technical systems remained visually discreet while supporting optimal environmental performance.

This approach minimizes visual clutter, improves operational usability, and preserves the architectural character of the auditorium interior.

Outcome

The final design creates a flexible and performance-oriented auditorium environment capable of supporting contemporary academic communication and hybrid learning activities.

Acoustic strategies were developed to optimize reverberation time and speech intelligibility for lectures, conferences, and hybrid learning environments.

Through integrated acoustic, lighting, and audiovisual consultancy, the auditorium achieves:

• Improved speech intelligibility

• Enhanced audience comfort

• Better presentation visibility

• Flexible multimedia capability

• Human-centered communication quality

• Seamless technology integration

The project demonstrates how multidisciplinary environmental design can elevate educational spaces beyond conventional technical infrastructure into immersive and effective learning environments.

Rather than functioning solely as an event venue, the auditorium becomes an adaptive communication ecosystem that supports education, collaboration, and institutional engagement within a modern university setti

Project Information

• Project: Mandiri University

• Sector: Corporate Higher Education

• Location: Jakarta, Indonesia

• Service: Audiovisual System, Building Acoustic, Architectural Acoustic, Architectural Lighting

• Consultant: Herwin Gunawan / ALTA Integra

• Year: 2022

Audiovisual Lighting Acoustics Design Integration Karnaval Thamrin Community Entertainment

Mixed Use Lifestyle and Entertainment Destination

Project Overview

Karnaval Thamrin was developed as a modern lifestyle and culinary destination that brings together dining, entertainment, social interaction, and community experience within a vibrant urban environment in Central Jakarta.

Inspired by the energy of contemporary city culture, the project combines modern architectural ambience with a dynamic hospitality experience designed to attract young professionals, communities, families, and urban visitors seeking a lively yet comfortable social destination.

To support the experiential character of the venue, Morin Architect, Herwin Gunawan and ALTA Integra team provided acoustic, lighting, and audiovisual consultancy services aimed at creating a human-centered mixed-entertainment experience where sound, light, and communication systems work cohesively with the architectural atmosphere.

The consultancy approach focused on balancing:

• Acoustic comfort within active hospitality spaces

• Atmospheric lighting quality

• Audiovisual communication and entertainment systems

• Visitor wellbeing and sensory comfort

• Architectural ambience and spatial identity

Rather than positioning technology as merely technical infrastructure, the project integrated audiovisual system, stage and architectural entertainment lighting, and acoustic environment as experiential design instruments that shape mood, communication quality, emotional perception, and social interaction throughout the venue.

The result is a contemporary urban lifestyle environment that feels energetic, immersive, and socially engaging while maintaining visual comfort, acoustic balance, and environmental quality for visitors.

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Contemporary Lounge Dining Experience

The Challenge

Contemporary mixed-use lifestyle destinations present increasingly complex environmental challenges due to the integration of coffee shops, dining venues, bars, entertainment areas, and public social interaction functions within a fragmented environment.

The project required balancing:

• Acoustic comfort within active social environments

• Lighting atmosphere across multiple spatial identities

• Audiovisual flexibility for different events and entertainment

• Speech clarity within public gathering zones

• Visual comfort for visitors

• Integration of technical systems within architectural interiors

One of the primary challenges was creating an energetic and immersive lifestyle entertainment atmosphere while maintaining environmental comfort by controlling unwanted sound reflection, minimizing noise disturbance to nearby hotels and residential developments, reducing visual overstimulation from excessive lighting, and ensuring balanced audiovisual distribution throughout the venue.

Excessive reverberation, uncontrolled noise transfer, overly bright lighting, or fragmented audiovisual systems can negatively impact visitor comfort, emotional experience, and overall spatial quality. The project therefore required a thoughtful multidisciplinary strategy capable of balancing performance, atmosphere, technology, and human experience simultaneously.

Our Approach

Our approach began by understanding Karnaval Thamrin not merely as a commercial space, but as a human-centered experiential environment where environmental quality directly shapes how people interact, communicate, and emotionally connect with the space.

The design strategy integrated:

• Architectural acoustic evaluation

• Lighting atmosphere development

• Audiovisual system coordination

• Human behavioral considerations

• Spatial communication hierarchy

• Environmental comfort analysis

The acoustic design strategy focused on:

• Managing reverberation and noise buildup

• Improving speech intelligibility

• Enhancing auditory comfort

• Supporting social interaction quality

• Balancing energetic ambience with acoustic control

The lighting strategy emphasized:

• Layered atmospheric lighting

• Visual hierarchy

• Material enhancement

• Human visual comfort

• Flexible scene adaptability

• Day-to-night ambience transition

Meanwhile, the audiovisual consultancy supported:

• Flexible event capability

• Background music distribution

• Digital communication systems

• Public engagement experience

• Scalable entertainment infrastructure

The overall approach ensured that environmental systems contribute positively to both operational performance and emotional user experience.

Human-Centered Performance Strategy

The project adopted a human-centered environmental strategy where performance was evaluated not only technically, but through human perception, comfort, and emotional response.

The design carefully considered how visitors emotionally perceive and experience the environment through sensory and social interactions, including how they hear, see, smell, taste, navigate, communicate, and socialize within the space.

Acoustic strategies were developed to reduce excessive noise fatigue while preserving the lively social character of the venue. Lighting design balanced visual stimulation with comfort by controlling: brightness hierarchy, glare perception, color temperature, dynamic color ambient, spatial contrast for creating different ambient mood.

The audiovisual systems were designed to support live band performances, DJ entertainment, and ambient lounge background music, while the visual systems enable dynamic lighting scenes, live performance visuals, and promotional multimedia content. This approach creates a more immersive and emotionally engaging hospitality environment while supporting entertainment activities and social interaction throughout the venue.

Design Integration

A key strength of the project was the integration between architecture, acoustics, lighting, and audiovisual technology from the early stages of design development.

The integration process included: Acoustic material coordination, Lighting scene simulations, Audiovisual infrastructure planning, Equipment concealment strategies, Environmental comfort evaluation, Architectural, Building Structure and MEP detailing integration.

Rather than allowing technical systems to compete visually with the architecture, the design carefully embedded performance systems into the spatial language of the project. This integrated methodology improves: Operational efficiency, Spatial coherence, User experience quality, Maintenance accessibility and Architectural cleanliness.

The result is an environment where technology enhances atmosphere without becoming visually intrusive.

Outcome

The final design creates a vibrant yet comfortable lifestyle environment that supports social interaction, entertainment, hospitality, and public engagement within a cohesive architectural experience.

Through integrated acoustic, lighting, and audiovisual consultancy, Karnaval Thamrin achieves: Improved environmental comfort, Enhanced spatial atmosphere, Better audiovisual and communication quality, Flexible scenario capability, Human-centered visitor experience, and Integrated architectural technology performance

The project demonstrates how multidisciplinary environmental design can transform commercial and hospitality spaces into emotionally engaging, performance-oriented environments that support both business objectives and human wellbeing.

Rather than functioning solely as a retail or entertainment venue, Karnaval Thamrin becomes an immersive urban social environment shaped through the careful integration of sound, light, and human-centered architectural experience.

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Entertainment Scenario

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Project Information

• Project Name: Karnaval Thamrin

• Location: Jakarta, Indonesia

• Project Type: Lifestyle, Hospitality & Entertainment Destination

• Services: Audiovisual System Design, Stage & Architectural Lighting Design, Building and Architectural Acoustic Consultancy, Entertainment Technology Integration and Environmental Experience Design

• Consultant: Herwin Gunawan / ALTA Integra

• Year: 2023

Color as a Communication Medium: Facade Lighting Design Testing for Jakarta Cathedral

Project Overview

As one of Jakarta's most recognizable heritage landmarks, Jakarta Cathedral has been an integral part of the city's history since the Dutch colonial period. The cathedral stands not only as a place of worship, but also as a living witness to the social, cultural, and architectural evolution of Indonesia's capital.

Over the decades, the cathedral has become a powerful symbol of religious harmony, demonstrating how faith, culture, and community can coexist within a diverse urban society. Its presence within Jakarta's historic civic district continues to contribute to the city's cultural identity and collective memory.

To preserve this legacy, Jakarta Cathedral remains committed to the continuous conservation and enhancement of its architectural environment. These efforts ensure that the cathedral continues to serve both as a treasured heritage building and as a vibrant spiritual home for the Catholic community in Jakarta.

One of these efforts is exploring how Jakarta Cathedral tells its story at night through architectural lighting. Architectural lighting is often perceived as a tool for visibility and aesthetics. However, within civic, cultural, and religious architecture, light can serve a much broader role—as a medium of communication.

“Cultural and historical heritage is an irreplaceable and invaluable treasure. It represents an essential legacy for local communities, nations, and all humankind, connecting past generations with the present and future.”

— UNESCO - World Heritage Convention

The facade lighting color testing study for Jakarta Cathedral was developed to explore how different lighting colors influence public perception, emotional atmosphere, symbolic meaning, and the cathedral's relationship with the city at night.

As one of Indonesia's most important religious and cultural landmarks, Jakarta Cathedral regularly hosts major liturgical celebrations, national commemorations, interfaith events, and international visits. The project investigated how facade lighting could provide the flexibility to communicate these different occasions while preserving the dignity, heritage value, and sacred character of the cathedral.

Rather than viewing color-changing lighting as a decorative feature, the study approached color as a visual language capable of expressing identity, celebration, remembrance, solidarity, and spirituality.

Architectural lighting is not merely about illumination. Color becomes a visual language capable of communicating meaning, celebration, remembrance, spirituality, and cultural identity.

The facade lighting color testing for Jakarta Cathedral explored how different colors influence public perception, emotional response, and the symbolic expression of one of Indonesia's most important religious landmarks.

The study investigated how lighting could support:

• Religious celebrations

• Liturgical seasons

• National commemorations

• Cultural events

• Interfaith harmony initiatives

• Special ceremonial occasions

without compromising the dignity and heritage value of the cathedral.

Building Facade Contour, Light and Shadow Near Sunset

The Challenge

Historic religious buildings carry a unique responsibility within the urban environment.

Unlike commercial buildings, where dynamic lighting is often used for branding and attraction, heritage religious architecture requires a more sensitive approach. Every lighting intervention must respect the building's architectural integrity, cultural significance, and spiritual atmosphere.

The primary challenge was balancing:

• Heritage conservation principles

• Architectural authenticity

• Sacred identity

• Public communication needs

• Nighttime landmark visibility

• Environmental responsibility

The project also needed to address an important question:

How can a historic cathedral communicate different messages and ceremonial occasions through light without compromising its timeless architectural character?

The design team recognized that color has the ability to evoke emotional responses and symbolic meanings. However, excessive use of color or inappropriate lighting compositions could easily diminish the solemnity and dignity expected from a sacred landmark.

The testing process therefore focused on identifying lighting approaches that could enrich communication while maintaining respect for the cathedral's religious significance.

Building Facade Contour Analysis, Lighting Position Testing, and the Perception of Light and Shadow

Our Approach

In developing the nighttime lighting strategy, we first studied how the architectural contours, proportions, and visual hierarchy of the cathedral are perceived during daylight conditions. Understanding the building's form in natural light allowed us to identify the key architectural elements that define its character and historical significance.

We then conducted a series of lighting models and simulations, evaluating various illumination levels, light quality, color compositions, fixture locations, and beam angles. These simulations enabled us to assess how different lighting approaches would interact with the cathedral's Neo-Gothic architecture and influence its nighttime identity.

Through this process, we analyzed how the balance between light and shadow could reveal the building's contours, architectural details, and vertical expression. Rather than simply making the cathedral brighter, the objective was to create a visual composition that communicates peace, dignity, grandeur, and a sense of wonder—allowing visitors to appreciate both the spiritual presence and the rich historical legacy of one of Indonesia's most important religious landmarks.

The study explored a series of facade lighting color scenarios to understand how different lighting compositions influence architectural perception and emotional response. Rather than evaluating color purely from an aesthetic perspective, the testing examined:

• Symbolic meaning

• Cultural associations

• Religious significance

• Emotional perception

• Architectural readability

• Nighttime urban identity

Multiple lighting scenarios were developed and visually assessed to understand how the cathedral's Neo-Gothic architectural features responded to different color palettes. Particular attention was given to preserving:

• Architectural detail visibility

• Material authenticity

• Visual hierarchy

• Building proportions

• Sacred atmosphere

The testing process allowed stakeholders to compare how different colors transform the perception of the same building while maintaining a coherent architectural identity.

Color: Liturgical Meaning and Emotional Perception

The project adopted a human-centered lighting philosophy that recognizes that people do not simply see color—they emotionally interpret it. Different colors can communicate different messages and create distinct emotional experiences.

Warm White

Warm white lighting reinforces the cathedral's timeless elegance and architectural authenticity while creating a sense of spiritual calmness and visual comfort. By revealing the building in a manner that closely reflects its natural appearance and material character, this lighting approach supports the everyday worship atmosphere and presents the cathedral in its most historically respectful and enduring form.

Gold and Amber

Golden and amber lighting tones communicate a sense of celebration, joy, and religious festivity while enhancing the cathedral's monumental presence and spiritual warmth. These colors create a welcoming and uplifting atmosphere that highlights the significance of special occasions, making them particularly suitable for major religious celebrations, festive seasons, and important ceremonial events.

Green

Green carries rich symbolic meaning within both Christian tradition and human perception, representing hope, renewal, growth, and spiritual vitality. In the Catholic liturgical calendar, green is associated with Ordinary Time, symbolizing perseverance in faith, ongoing spiritual growth, and the everyday journey of Christian life. Emotionally, green evokes a sense of harmony, balance, peace, and connection with nature, creating a welcoming and restorative atmosphere.

Blue

Blue lighting evokes a sense of peace, reflection, contemplation, hope, and serenity, creating a calm and introspective atmosphere around the cathedral. Its gentle and tranquil character encourages moments of personal reflection and spiritual connection, making it particularly effective for occasions that call for remembrance, prayer, unity, and emotional calmness.

Purple

Purple carries deep liturgical significance within the Catholic tradition and is closely associated with the seasons of Advent and Lent. The color symbolizes spiritual preparation, reflection, and repentance, encouraging a period of introspection and renewal. When applied to the cathedral facade, purple lighting creates a solemn and contemplative atmosphere that reflects the spiritual journey of faith, anticipation, and personal transformation.

Red

Red carries profound symbolic meaning within the Catholic tradition, representing the Holy Spirit, martyrdom, courage, and passion. The color is often associated with significant religious celebrations and solemn commemorations, conveying a sense of spiritual strength, sacrifice, and devotion. When applied to the cathedral facade, red lighting creates a powerful and emotionally resonant presence that reflects both the vitality of faith and the enduring legacy of those who have courageously borne witness to it.

By understanding these emotional and symbolic associations, lighting becomes a communication tool that supports meaningful human experience rather than merely changing visual appearance.

Heritage Conservation and Technical Integration

Beyond designing visual beauty, symbolic meaning, and emotional perception, the lighting strategy also had to respect the principles of heritage conservation and long-term building preservation.

As a designated heritage building, any lighting intervention must minimize physical impact on the historic structure. The installation of luminaires, cabling, mounting brackets, and supporting infrastructure was therefore carefully coordinated to comply with conservation guidelines. Particular attention was given to avoiding invasive installation methods, such as drilling or creating new openings in the historic fabric, which could potentially compromise the building's integrity or cause irreversible damage in the future.

The placement of lighting fixtures was also carefully evaluated to prevent excessive heat accumulation near sensitive architectural elements. Improper fixture positioning can trap heat and accelerate the deterioration of historic materials over time. Therefore, thermal considerations formed an important part of the design evaluation process.

Environmental sustainability was equally important. The lighting strategy prioritized energy-efficient light sources while carefully controlling brightness levels and light distribution to minimize unnecessary light spill and light pollution. This approach ensures that the cathedral remains visually prominent within the nighttime cityscape while maintaining environmental responsibility and preserving the dignity of one of Indonesia's most significant cultural heritage landmarks.

This integrated methodology demonstrates how architectural lighting can simultaneously support heritage conservation, environmental sustainability, technical performance, and meaningful nighttime storytelling. The project required the integration of architecture, heritage conservation, lighting technology, and cultural symbolism.

Special attention was given to ensuring that dynamic lighting scenarios remained subordinate to the architecture itself. The objective was not to transform the cathedral into a digital display, but to allow light to respectfully complement the building's architectural expression and ceremonial role. This approach ensures that the lighting enhances communication while preserving the cathedral's identity as a sacred and historic landmark.

Outcome

The color testing study demonstrated that facade lighting can serve as a powerful communication medium within heritage architecture.

Different lighting colors create different perceptions, emotions, and symbolic meanings while influencing how people connect with the building and the events it represents.

The project established a framework for future lighting scenarios capable of supporting:

• Religious celebrations

• Liturgical seasons

• National commemorations

• Interfaith solidarity events

• International visits

• Cultural celebrations

• Civic recognition programs

Most importantly, the study demonstrated that dynamic lighting can coexist with heritage conservation when guided by thoughtful design principles and respect for architectural identity.

The Jakarta Cathedral facade lighting color testing project illustrates how light can become more than illumination—it can become a meaningful language that connects architecture, culture, faith, and community within the nighttime cityscape.

ALTA Integra is a Building Science and Technology consultancy dedicated to creating human-centered environments through evidence-based design. By studying the relationship between light, sound, space, technology, and human emotion, we help transform buildings into places that inspire wellbeing, strengthen identity, and support a more sustainable future.

Every building has a story to tell. Through thoughtful architectural lighting design, we help reveal that story—enhancing heritage, enriching human experience, and creating meaningful connections between architecture, culture, and community. Visit our lighting design service page to discover how lighting can bring new life and meaning to your project after dark.

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Auditorium Theater Design: Audiovisual, Lighting, Acoustic - Santo Ignatius Kanisius Jakarta

ALTA Integra collaborate with Atelier Cosmas Gozali designed audiovisual acoustic lighting Multi-Function Hall, Education Theater and Library at Kolese Kanisius Menteng Ignatius Loyola New Building for Future Education Facility.

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Theater Class

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Auditorium Hall

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Library

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Bagaimana kami mendesain Noise Barrier Kebisingan Pekerjaan Konstruksi Rumah Sakit PIK

Menjaga ketenangan lingkungan rumah sakit pada saat pekerjaan konstruksi merupakan jaminan pelayanan kesehatan yang perlu diberikan oleh Rumah Sakit yang memberikan kepuasan pasien.

Bagaimana kami mendesain Noise Barrier untuk menjaga ketenangan Rumah Sakit PIK dari kebisingan Pekerjaan Konstruksi Gedung Rumah Sakit Ibu dan Anak RS PIK?

Mengidentifikasi jenis dan tingkat kebisingan yang akan terjadi

Hal pertama yang kami lakukan adalah mengidentifkasi jenis kegiatan konstruksi mulai dari pemotongan struktur beton, jack hammer, mobilisasi material dan sampah dan seterusnya. Kemudian kami melakukan pengukuran untuk setiap kebisingan dilanjutkan dengan membuat mapping kebisingan.

Membuat permodelan kebisingan untuk memprediksi dampak kebisingan yang akan terjadi

Gambar dibawah merupakan hasil permodelan kebisingan dari beberapa pekerjaan konstruksi mulai dari

1. Gambar kiri atas pekerjaan concrete cutting menghasilkan kebisingan 105.7 dBA dengan posisi kebisingan yang berpindah-pindah. Prediksi tingkat kebisingan akan terjadi kebisingan di depan facade gedung digambarkan dengan simbol setengah bola. Terlihat beberapa titik setengah bola berwarna orange yang mewakili tingkat kebisingan 70 dBA sampai dengan waran hijau tua sebesar 60 dBA.

2. Gambar kanan atas menunjukan prediksi tingkat kebisingan pada facade bangunan rumah sakit akibat pekerjaan Jack Hammer.

3. Gambar kiri bawah menunjukan prediksi tingkat kebisingan pada facade bangunan akibat pekerjaan Pile Driver dengan sebaran kebisingan lokasi pekerjaan yang berpindah-pindah.

4. Gambar kanan bawah menunjukan aktifitas pekerjaan umum lainnya dengan kebisingan rata-rata 85 dBA

Membuat beberapa konsep desain Noise Barrier untuk mendapatkan performa akustik yang terbaik

Gambar dibawah merupakan prediksi kebisingan terendah dengan biaya Noise Barrier terendah yang terjadi pada permukaan facade Rumah Sakit

1. Gambar kiri atas menunjukan desain permanen noise barrier dan portable noise barrier untuk pekerjaan jack hammer dan concrete cutting di mana posisi paling dekat dengan rumah sakit. Facade yang terpapar kebisingan 70 dBA merupakan facade dengan ruangan tidak rentan kebisingan seperti area sirkulasi dan gudang barang.

2. Gambar kiri bawah merupakaan simulasi saat posisi kerja terjauh dari bangunan rumah sakit. Kebisingan di permukaan facade sekitar 60 dBA.

3. Gambar kanan atas menunjukan permodelan dan simulasi kebisingan saat pekerjaan pembongkaran lantai basement pada posisi terdekat bangunan.

4. Gambar kanan bawah permodelan dan simulasi kebisingan saat pekerjaan pembongkaran lantai basement pada posisi agak jauh dari bangunan.

Mereview mock up kontraktor Noise Barrier

Setelah ditunjuk kontraktor pemenang pekerjaan pembongkaran fasilitas parkir, maka kontraktor perlu mengajukan mock up material Noise Barrier sesuai dengan gambar yang kami buat.

Proses kegiatan konstruksi

Foto di bawah menunjukan Noise Barrier yang telah terpasang dan pekerjaan konstruksi dapat berjalan tanpa menggangu kegiatan pelayanan kesehatan oleh Rumah Sakit Pantai Indah Kapuk.

Berapa banyak dari kita yang merasakan gangguan kebisingan akibat pekerjaan konstruksi, dan tanggung jawab apa yang sudah dilakukan oleh pemiliki pekerjaan?

Apakah sudah ada regulasi yang mengatur tingkat kebisingan dari pekerjaan konstruksi agar tidak mengganggu aktifitas lain seperti sekolah, kantor, rumah tinggal dan lain-lain.

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