In a large telecommunications auditorium, perforated absorbent materials are used to line the ceiling so as to
A
Increase the reverberation of sound in the hall
B
increase the amount of echo in the hall
C
reduce the hight of the ceiling from the floor
D
reduce the reverberation of sound in the hall
Verified Correct Answer: D.
Physical Principles & Numerical Solution
In a large auditorium perforated, absorbent materials are used to line the ceiling so as to reduce the effect of multiple reflection of echo called reverberation
Source: Myschool Past Questions Archive (Record #13939)