Question

an echo is produced by the ____of sound​

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.

Answer 2

Explanation:

an echo sound is produced by waves of sound