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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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• Index
• next: 4.2 What is the sound absorption coefficient ?

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physics, acoustics