Question

6.
7. What do you mean by echo (of sound give reason​

Answer 1

Answer:

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. ... You were frightened when you thought someone was following you, until you realized you were only hearing the echo of your own footsteps.

Explanation:

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Answer 2

Repetition of sound waves produced by a reflection of sound by striking the wall or the o obstructing object . The sound is heared again near its source after being reflected .