Question

when a sound wave bounce back,an ____ is created ​

Answer 1

Answer:

Echo.

this is your answer

Answer 2

Explanation:

Since air molecules (the particles of the medium) are moving in a direction that is parallel to the direction that the wave moves, the sound wave is referred to as a longitudinal wave. The result of such longitudinal vibrations is the creation of compressions and rarefactions within the air.