Question

Sometimes reflection of sound may be undesirable. Can you give some example?​

Answer 1

Explanation:

sometimes reflection of sound is undesirable : because when u r in a cinema Hall and u hear the conversation twice u don't like it.thats the reason the roof of the Hall is made in a curving manner so it doesn't reflect. whereas at echo points this reflection of sound is desirable.

Answer 2

Answer:

echo, sonar

Explanation:

echo because it has reflective property under water also so it is undesirable

where as the same property as the sonar