- #1
randomgamernerd
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Homework Statement
:[/B]At a prayer meeting the disciples sing JAI RAM .The sound amplified by a loudspeaker comes back after reflection from a building at a distance of 80 m from the meeting. What maximum time interval can be kept between one JAI-RAM and the next JAI-RAM so that the echo does not disturb a listener sitting in the meeting. Speed of sound in air is 320 m s-1.
Homework Equations
: [/B]s/t =vThe Attempt at a Solution
:I did a blind guess and worked out the problem as follows:
Time taken to go to the wall = Time taken to come back = 80/320 s
⇒ Time difference = 2 x 80/320 = 1/2s.
Answer matches with the one given in the text.
I just want to know significance of the line "echo does not disturb a listener"