This video explains how STIPA (Speech Transmission Index for Public Address) testing is used to evaluate speech intelligibility in public spaces. It explores how acoustic measurements help assess whether announcements and spoken information can be understood by listeners.

The discussion connects public address system performance with the acoustic conditions of the surrounding space. Background noise, reverberation, echoes, and loudspeaker performance can all influence speech clarity, making coordination between room acoustics and audio system design essential.

Through an introduction to STIPA measurement, the video examines factors that reduce intelligibility and highlights considerations for evaluating public address systems in airports, railway stations, auditoriums, educational facilities, convention centers, and places of worship.

For architects, acoustic consultants, audiovisual designers, engineers, facility managers, and building owners, the video offers a practical perspective on connecting design decisions with the listening experience.

Part of the Herwin Gunawan Work video library, this video reflects ALTA Integra’s focus on human-centered building performance, bringing together architectural acoustics, audio system design, and performance evaluation to support clearer communication.