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
Correct Answer: Option D
Explanation
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
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