Question

please answer and GIVE THREE INCIDENCES​

Answer 1

Yes , Sometimes it is an desirable for example in cinema hall when sound is reflected it may disturb the audience.

Answer 2

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Here u go

Yes sometimes undesirable

Example--- cinema hall when sound is reflected it may disturb the audience.

Incidence

A boy crying in a classroom. (The walls rebound the sound)

Undesirable sound is called noise which has no wave pattern.

and many more

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