Question

Sometimes reflection of sound may be undesirable .can you give me any examples

Answer 1

In a movie theatre, reflection of sound isn't really desirable. Hence sound boards and foams that absorb reflected sound are installed on the walls.

Answer 2

It is undesirable at many places like while dubbing in a film, we need that the voice should not reverberate as after the person will speak a word of will echo multiple times and this can create confusion also.