Answers

2015-05-21T16:01:17+05:30
An echo is a reflection of sound, arriving at the listener some time after the direct or original sound. The main conditions for hearing an echo are:-
1) There should be minimum distance of 17 m between the source of sound and the reflector.
2) There should be a time gap of 0.1 sec between the original sound and the sound received after reflection.
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