Question

Explain the concept of echo? ​

Answer 1

An echo is a repetition or imitation of sound. When sound waves hit a hard surface they might reflect, making the sound bounce and repeat. If you agree with someone, you might echo his or her statement. ... In Greek mythology, Echo was a nymph who could only repeat the last words of others.

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Answer 2

The repeated sound that is caused by the reflection of sound waves from a surface the sound is heard more than once because of the time difference between the initial production of the sound waves and their written from the reflecting surface.