Building acoustics 32 The reverberation times in a cinema theatre are 3s,2s when it is empty,filled with audience respectively The - Physics - Electromagnetic Waves

Question

Building acoustics
32 The reverberation times in a cinema theatre are 3s,2s when it is
empty,filled with audience respectively The reverberation time when
the theatre is half filled with audience is ---------
33 The reverberation time of a room is 't' second Another room of
double the dimensions with the walls of the same
absor1ptioncoefficient will have a reverberation time

Neha Gupta · Accepted Answer

33) Reverbation time is directly proportional to the volume of the room and inversely proportional to the absoption coefficient
Let l,b,h are the length , breadth and height of the room which has reverbation time t
volume = lbhwhen another room with same absoption coefficient and double in the diemention has the volume = 2l×2b×2h = 8lbhnew volume = 8×olf volumenew reverbation time is 8×t = 8t

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