Question

What is echo & what factors are important to get a distinct echo?

Answer 1

the repetition of sound by high buildings or mountains is called echo...
























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it's factors are -
there should be a distance between the person and object.

there should be a high leveled object, eg., buildings and mountains, etc,.

Answer 2

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 proportional to the distance of the reflecting surface from the source and the listener