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Reverberant Sound Level (From Room Constant)    1/1, 1/3

Strutt|Building Acoustics|Reverberant Level (From Room Constant) calculates the reverberant sound level based on the Room Constant R, as follows:

L_(p,rev)=10log(4/R)

Note that calculating L_(p,rev) using R is the 'exact' calculation (provided that the sound field is diffuse); the alternate approach (Reverberant Level (from RT)) is an approximation for situations where the average absorption coefficient in the room alpha_(ave) is low.