Question

why do we hear an echo?
​

Answer 1

Answer:

Echoes. 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. Although the direction of the sound changes, the echo sounds the same as the original sound.

if it helpful to you.plz mark it as braniliest answer.

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. ... That is why echoes can be heard in a canyon, cave, or mountain range. But sounds are not always reflected.