Speech intelligibility
What an STI of 0.60 means
What the Speech Transmission Index measures, why 0.60 is a sensible design target under IEC 60268-16, and how reverberation, noise and layout move it.
4 min read
Blog topic, 03
Speech intelligibility, will the announcement be understood?
A system can be loud enough and still be hard to follow. These articles explain what the Speech Transmission Index measures and what moves it.
3 articles in this topic
Numbered by their place in the whole series.
Acoustics
RT60 in plain words
What reverberation time is, how Sabine and Eyring estimate it from a room’s surfaces, and why a lively room changes the speaker count and the STI you can reach.
5 min read
Acoustics
Designing sound for terraces and gardens
Outdoor areas have no ceiling and few walls. How open sides and open sky change a design, how ambient noise sets the level, and what outdoor speakers need.
3 min read
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