Question

A cinema hall has volume of 7500 m3. It is required
to have reverberation time of 1.5 seconds. The total
absorption in the hall should be
(1) 850 w-m?
(2) 82.50 w-m?
(3) 8.250 w-m
(4) 0.825 w-m
​

Answer 1

Answer:

answer in attachment