Question

It is noticed that a sharp tap made in front of stone steps give rise to a ringing sound assuming that each step is 0.25m deep. Estimate the frequency of the sound .(The vel of sound=340m/s)​

Answer 1

Answer:

The echo from the steps is in phase with the original sound.

So the steps must be 1/2 wavelength deep, and the reflected sound

is then in phase with the incoming sound,  and the wavelength is .5 m,

f = 340 / .5 = 680 / sec