Question

What is an echo?
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Answer 1

Answer:

Echo is the reflected sound of the speaker that is heard as soon as the sound had been produced. In other words it is the repetition of sound on getting deflected. Echoes can be heard in a canyon, cave, or mountain range. But sounds are not always reflected.

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Answer 2

Answer:

Echo is defined as a sound repeating by sound wave reflection, having a lasting or far reaching impact, or repeating what someone else has said. An example of echo is the repeating of a sound created by footsteps in an empty marble hallway. ... An example of echo is a teacher agreeing with and repeating what a parent says.