Question

define echo and explain in brief​

Answer 1

Answer:

a sound that is repeated as it is sent back off a surface such as the wall of a tunnel...

Answer 2

Answer:

Echo in audio signal processing and acoustics,echo is a reflection of sound that arrives at the listener with a delay after a direct sound.The delay is directly proportional to the distance of the reflecting surface from the source and the listener.

Explanation:

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