Question

Calculate the minimum distance between listener and reflector for having distinct the echo of an inarticulate sound if the velocity of sound be 340 m/s.​

Answer 1

Answer:As we know that the perception of a sound usually endures in memory for only 0.1 seconds

so, minimum time for echo = 0.1 sec

distance = d

sound have to travel, from listener to reflector then to listener

so total distance travelled = 2d

now, distance = speed× time = 340 ×0.1

⇒2d = 34

⇒d = 17 m

minimum distance for echo is 17 m

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