Which of the following is an example of sound-absorbent material used to reduce reverberation?

Correct option is D

The correct answer is (d) Compressed fibre board.
· Compressed fibre board is a type of sound-absorbent material commonly used to reduce reverberation in rooms and auditoriums. It works by absorbing sound waves and reducing the amount of sound that is reflected back into the space, thereby minimizing echo and reverberation.

Information Booster:
· Ceramic: Ceramic materials are hard and dense, making them excellent at reflecting sound rather than absorbing it. They are not typically used for sound absorption.
· Glass: Glass is a rigid and non-porous material, which also reflects sound waves rather than absorbing them. It is used more for soundproofing rather than sound absorption.
· Iron: Iron is a dense and hard material that reflects sound waves.