Question

*Q. 45. What do you mean by an echo? ​

Answer 1

Answer:

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

Explanation:

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Answer 2

Answer:

echo is a reflection of sound that arrives at the listener with a delay after the direct sound.