Question

what is an echo? what are the two conditions required to hear an echo?

Answer 1

the reflected sound is called echo.
and one also defination.
the bouncing back sound is called echo
transverve wave and longutidunal wave to hear echo

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

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