Question

what is an echo? what facetors are important to get a distinct echo?​

Answer 1

Echo is a type of blinding disease in which the person has a small amount of vitamin A whicb helps us not be blind

Answer 2

The repeatation of sound caused by reflection of sound wave called an echo....

The minimum distance from a sound reflecting surface to hear an echo is 17.2 m.

The minimum temperature from a sound reflecting surface to hear an echo is 20° C