Question

what is echo????????????????

Answer 1

Hey ..!

An echo is a sound or sounds caused by the reflection of sound waves from a surface back to the listener.

Hope it help..
#bipasha

Answer 2

Heya dear user !!!

Here is your answer,

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Echo : repetation of original sound.

Suppose we are at a place where the reflection surfaces are about 17m, or more, away from the direct sound source. We then hear the reflected sound as a 'separate sound'. This sound is, nothing but a repetation of the original sound.
We call it as an ECHO.

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Hope it helps.