Watch Herwin Gunawan’s keynote at Signify Innovation Day 2026, exploring lighting design’s role in LEED certification and sustainable building performance in Indonesia. The presentation connects energy performance, visual comfort, daylight, and lighting controls with a human-centered approach to design.

Discover Wind Arbor by Ned Kahn at Marina Bay Sands, Singapore. This field observation explores how a wind-responsive facade combines kinetic art, solar shading, and changing patterns of daylight and shadow.

Explore the retractable loudspeaker system at the Elbphilharmonie in Hamburg. This field observation by Herwin Gunawan highlights the relationship between architectural integration, sound reinforcement, and concert hall acoustics.

A field observation of motorcycle exhaust noise during Jakarta’s Sunday Morning Ride, known as Sunmori. Herwin Gunawan connects the activity on Jalan Patiunus with residential acoustic comfort and the need to assess traffic noise affecting nearby homes.

A close look at a noise barrier mock-up for a hospital construction project. This short video highlights the role of physical samples in reviewing construction details and coordinating acoustic design intent before installation.

How light, color temperature and contrast shape the way people feel and behave in places of worship. A building physics view on designing sacred interiors that support reflection, focus and a sense of the transcendent while staying visually comfortable and energy-aware.

What makes a classroom or learning space work? This video looks at the key design criteria behind effective learning environments, including acoustics, lighting, thermal comfort, air quality and spatial layout, and how together they support focus, communication and wellbeing.

Explore the testing and evaluation of lighting scenarios at Jakarta Cathedral with the ALTA Integra and Jakarta Cathedral teams. The video examines how architectural lighting can support visual comfort, spiritual experience, and liturgical celebration while revealing the character of sacred architecture.

Explore facade lighting design for Makassar Cathedral and the role of light in revealing architectural character after dark. This video offers a perspective on how exterior illumination can express the identity and sacred presence of a place of worship.

Why must the plaza above Kölner Philharmonie close during concerts? Herwin Gunawan explores what this concert hall in Cologne teaches us about impact noise, sound isolation, and the importance of coordinating architecture, structure, and acoustic design.

Explore on-site acoustic measurements through 360° video documentation. This recording presents background noise assessment, reverberation time testing, and STIPA speech intelligibility measurement, providing a view of the space in which the tests take place.

Explore how ALTA Integra connects owner requirements, acoustic and lighting design, simulation, construction coordination, and performance testing. This video follows the process from defining measurable targets to evaluating completed systems and occupant satisfaction.

Discover three reasons to engage ALTA Integra as an integrated building performance consultant: coordinated design leadership, balanced acoustic, lighting, and thermal performance, and clear accountability across a multidisciplinary team.

Meet ALTA Integra, a multidisciplinary building performance consultancy based in Jakarta, Indonesia. Discover how its team brings together acoustics, lighting, audiovisual systems, and sustainability to support human comfort, communication, and the experience of built spaces.

Why can you hear conversations through a wall? Explore Sound Transmission Class (STC), what it tells us about airborne sound insulation, and why wall construction and installation quality matter for acoustic privacy in homes, hotels, and workplaces.

Explore Herwin Gunawan’s experience as Technical Director for the DIPI 2022 fundraising event through this recording of Levi Gunardi performing his own composition, “Dancer.” The video captures a musical moment from the event and forms part of Herwin’s portfolio of live performance and charitable initiatives.

Herwin Gunawan’s experience as Technical Director for the DIPI 2022 fundraising event is documented through this performance of “Renungan” by Eros Djarot, featuring Anastasia Dinakrisma on vocals and Prionggo Mondrowinduro on piano. The recording forms part of his portfolio of event technical direction and charitable initiatives.

Join Herwin Gunawan’s acoustic listening experience at Laeiszhalle Hamburg during a 2022 performance of “Locomotive Breath” by Ian Anderson and Jethro Tull. This concert recording accompanies his observations of instrumental balance, drum clarity, and the interaction between amplified progressive rock and a reverberant concert hall.

Explore lighting scenario modeling for the Indonesia Stock Exchange Main Hall, developed by the ALTA Integra Lighting Design Team using DIALux. Presented in Herwin Gunawan’s portfolio, this video illustrates the use of digital visualization to communicate lighting design intent within an architectural space.

Share Herwin Gunawan’s acoustic listening experience through this recording of Philadelphia Boys Choir & Chorale at Esplanade Singapore in July 2018. The performance provides a starting point for reflecting on choral sound, vocal blend, and the relationship between music, space, and audience experience.

A field visit to Esplanade – Theatres on the Bay in Singapore, recorded in July 2018. It looks at how the building's architecture, performance spaces and sensory qualities come together, and what architects and consultants can learn from observing a world-class arts venue in person.

How can the sound of a worship space complement its architecture?

This short video introduces ALTA Integra’s approach to coordinating acoustic design and audio systems with the visual character of places of worship in Indonesia.

Read: Sacred Building Acoustic Design
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How will speech sound inside a large indoor arena before it's built? This project video from the Gelora Bung Karno Indoor Multipurpose Stadium in Jakarta uses acoustic modeling and auralization to let you hear speech in the space, testing clarity, reverberation and intelligibility at the design stage.

How will live music sound in a large indoor arena before it's built? This project video from the Gelora Bung Karno Indoor Multipurpose Stadium in Jakarta uses acoustic modeling and auralization of drum sound to test reverberation, echo and low-frequency behavior at the design stage.

How closely do acoustic predictions match field measurements? Explore ALTA Integra’s acoustic modeling and auralization for Indonesia Arena at Gelora Bung Karno, Jakarta, with reverberation time comparisons before and after acoustic treatment.

My documentary and field observation study of the Elbphilharmonie in Hamburg. I visited the concert hall to see first-hand how architecture, acoustics, structure and building services come together into one performance space, and what that level of integration can teach design teams.

Why does lighting quality matter in architecture? This short video introduces Herwin Gunawan’s perspective on lighting design and quality of life, highlighting light spectrum, softness, contrast, glare, and flicker as considerations for the spaces people use every day.

Herwin Gunawan shares ideas and experience on sustainable lighting at JDC Design Week 2024. The discussion explores five themes: carbon reduction, daylight integration, physical and mental well-being, equitable and inclusive design, and the preservation of nature, culture, and heritage.

Explore Herwin Gunawan’s experience as Technical Director for DIPI fundraising through an audiovisual recording test of “Ave Maria,” featuring pianists Aisha Sudiarso and Prionggo Mandrawinduro. This video connects his contribution to a charitable initiative with the practical work of recording musical performance.

Explore architectural lighting installation at Jakarta Cathedral in August 2024 through Herwin Gunawan’s project documentation. This video connects lighting design intent with its implementation, reflecting on how light can reveal sacred architecture and contribute to spiritual and liturgical experience.

How does sound shape the way we experience space? In this speaking engagement hosted by Clestra Asia Pacific, Herwin Gunawan explores the integration of architecture, interior design, and acoustics, connecting sound behaviour, material performance, and multisensory experience with practical design decisions.

Explore lighting, audio, and acoustic testing during the Indonesia Stock Exchange Main Hall renovation. This short project video documents a stage of ALTA Integra’s work to coordinate technical performance with the hall’s architectural character and user experience.

Explore acoustic measurement fieldwork through 360° video documentation shared by Herwin Gunawan. This recording covers background noise, reverberation time, and speech intelligibility testing, providing a view of the measurement process within its surrounding space.

Explore lighting scenarios for the 14 Stations of the Cross at Jakarta Cathedral in March 2025. With a smart control system designed and commissioned by ALTA Integra, this project connects architectural lighting with prayer, contemplation, and the spiritual experience of sacred space.

How do air, light, and noise pollution shape the experience of Jakarta? Herwin Gunawan shares an urban observation that brings these environmental concerns into one conversation, inviting reflection on everyday comfort, responsible design, and the quality of life in the city.

See how ALTA Integra uses an acoustic camera to investigate sound leakage in building partitions. Combining a 64-microphone array with visual imaging, the system helps the acoustic team locate potential leakage paths and communicate findings to support targeted inspection and corrective work.

Explore the origins of Jakarta Cathedral through three historical images. Shared by Herwin Gunawan, this short video offers a glimpse of the cathedral’s architectural evolution and invites reflection on the relationship between sacred architecture, cultural heritage, and the changing city.

How can building physics support a better workplace? Herwin Gunawan introduces the role of heat, air, moisture, sound, and light in office design, connecting environmental conditions with occupant comfort, well-being, and the conditions people need to work effectively.

Explore a Chinese opera stage through Herwin Gunawan’s architectural and acoustic perspective. This short video invites reflection on how stage form, overhead enclosure, and openness to the audience relate to sound projection, listening experience, and cultural performance.

Explore Jakarta Cathedral’s neo-Gothic interior through architectural animation. Presented by Herwin Gunawan, this video offers a spatial study of architectural form, proportion, and lighting, inviting reflection on how sacred spaces support spiritual and liturgical experience.

Explore the immersive lighting design concept for Kereta Misteri at Dufan, Ancol, Jakarta. Presented by Herwin Gunawan, this video considers how light, shadow, colour, and timed lighting effects can guide attention, build suspense, and support storytelling within a themed attraction.

How does architecture feel? In this short reflection, Herwin Gunawan explores light, shadow, sound, and silence as connected dimensions of spatial experience, inviting a closer look at the relationship between architectural lighting, acoustics, and human perception.

Building Physics Engineering improves health, comfort, productivity, and sustainability through better building design. Discover how ALTA Integra integrates acoustics, lighting, thermal comfort, indoor air quality, and performance simulation for high-performance buildings.

How clearly can people understand public announcements? Explore how STIPA testing evaluates speech intelligibility in public address systems, and how background noise, reverberation, and loudspeaker performance influence communication in public spaces.