Question

Why do we hear an echo?​

Answer 1

Answer:

An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. ... That is why echoes can be heard in a canyon, cave, or mountain range. But sounds are not always reflected.

Answer 2

Answer:

An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. ... Echoes can be heard in small spaces with hard walls, like wells, or where there are lots of hard surfaces all around

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