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JAMB Physics 2007 Question 7

Question 7

Sound

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

  1. A.reduce the reverberation of sound in the hall.
  2. B.reduce the height of the ceiling from the floor.
  3. C.increase the reverberation of sound in the hall.
  4. D.increase the amount of echo in the hall.
Show the answer and explanation

Answer: A (reduce the reverberation of sound in the hall.)

Explanation

Absorbent materials soak up sound instead of reflecting it, so repeated reflections (reverberation) die out quickly and speech stays clear.