Question

We cannot hear echo produced in classrooms

Answer 1

Because the room is too small for echo to be produced .And for echo the minimum time for sound to be reflected back is 0.l sec ,if you were in a large place surround by hills or something like that you will surely hear an echo of multiple reflection ie many times .

Answer 2

Because the room is too small for echo to be produced .And for echo the minimum time for sound to be reflected back is 0.l sec ,if you were in a large place surround by hills or something like that you will surely hear an echo of multiple reflection ie many times .

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