Calculate the reverberation time of a room, 10 m wide by 18 m long by 4 m high. The ceiling is acoustic, the walls are plastered, the floor is made of con- crete and there are 50 persons in the room. Sound absorption coefficients are acoustic ceiling 0.60, plaster 0.03, concrete 0.02, the absorbing power per person is 0.5.![]() |
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