Sound waves that are reflected off of a surface and returned to the listener produce a echo. The listener hears it sometime after the direct sound because it is the [[1]] of sound.

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Sound waves that are reflected off of a surface and returned to the listener produce a echo. The listener hears it sometime after the direct sound because it is the reflection of sound.
An echo is a sound that results from the return of sound waves to the listener from a surface. It is the reflection of sound, which reaches the listener after the direct sound has passed. An echo is characterised as a sound that repeats itself through the reflection of sound waves, has an impact that lasts or is felt far away, or repeats what has already been said. The sound of footsteps echoing down a marble hallway that is deserted is an example of an echo.

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