4.1 What is reverberation time ?
Description
This article is from the Acoustics FAQ, by Andrew Silverman with numerous contributions by others.
4.1 What is reverberation time ?
Work on room acoustics was pioneered by Wallace Clement Sabine 1868- 1919 (see his Collected Papers on Acoustics, 1922). The reverberation time, T, is defined as the time taken for sound energy to decay in a room by a factor of one million (ie by 60 dB). It is dependent on the room volume and its total absorption.
In metric units
0.161 x room Volume
T = ----------------------------------------------
sum of Surface areas x absorption coefficients
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