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