AV & Speech Intelligibility
Good offices and public spaces need acoustics that support focus, privacy and speech clarity. We design and tune room acoustics, measure STI, and commission AV systems to meet the target.
Scope
- Room-acoustic measurement (RT, NC/NR) for open plans, meeting and negotiation rooms
- Speech Transmission Index (STI) measurement
- Absorption and diffusion design with appropriate material selection
- AV system commissioning and coverage verification
- Post-installation verification testing
Standards & method
We reference ISO 3382 for room-acoustic parameters and IEC 60268-16 for STI, with NC/NR criteria for background noise.
Related services
This work is usually combined with PAGA & Voice Alarm Testing (STIPA) and Office & Workplace Acoustics. For the background before you decide, read STI and STIPA: how speech intelligibility is measured for PA, voice alarm and PAGA systems in Noise 101.
FAQ
What is STI?
The Speech Transmission Index measures how clearly speech is understood in a space — higher is clearer.
How do you fix an echoey meeting room?
By adding absorption in the right locations to lower reverberation and improve STI, guided by measurement.