Question

what are echoes ? why do we not hear them all the times ?​

Answer 1

Answer:

the repeation of sound is called echo.

we dnt listen every time because there are the things around us tat absorbs sound

Answer 2

Answer:

echo is a sound which we can hear on mountain like areas ....

like they are repeated and get slower and slower ...

we cannot hear them bcoz the things around us absorb the sound ...also it need a kinda boundary which doesnt absorb the sound to viberate which mountain do the work of...

hope it helps...

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