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In a large telecommunications auditorium, perforated absorbent materials are used to ...

In a large telecommunications auditorium, perforated absorbent materials are used to line the ceiling so as to
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  • 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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