Reverberation Time (RT60)  Sabine formula RT60 = 0.161 x Volume / Absorption
5 Sec.
2.5
1.25
0.63
0.31
Large Churches
Factories and Gymnasiums
Small Churches
School Rooms and Hospitals
Art Galleries and Homes
Offices and Lecture Halls
Department Stores
Radio and TV Studios
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Room Dimensions (W, D, H)
  x   x m
Materials Area m2
Wall area =
Ceiling area =
Floor area =
Frequency 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz
Seconds
Absorption