Question

what is an echo and definition of echo
​

Answer 1

$\huge\blue{HoLa}$

The repetition of sound.

In audio signal processing and acoustics, echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the listener

Answer 2

$\rule{200}3$

$\huge\tt{ANSWER:}$

ECHO : An echo is generally a repeated sound, as 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.

$\rule{200}3$