the minimum distance required between source and reflecting surface to hear echo is?
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The minimum distance required between source and reflecting surface to hear echo is 17.2m
Lord007Thopalli:
it is 17 to 17.5m depending on wind, obstacles and speed of sound(~330m/s)
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The minimum distance required between source and reflecting surface to hear echo is 17.2m .
If the distance is less than 17 meters or 16.5 meters or so, the sound coming directly from sound source , overpowers the echo... so echo is not heard distinctly and separately.
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