Question

Two speakers emit the same sound wave, identical frequency, wavelength, and amplitude. What other quantity would be necessary to determine if constructive or destructive interference occurs at a particular point some distance from the speakers?

Answer 1

Phase Difference

Step-by-step explanation:

When the sound waves have same wavelength, frequency and amplitude we just need the phase difference between them at a particular location to determine whether the waves are in constructive interference or destructive interference.

Interference is a phenomenon in which there is superposition of two coherent waves at a particular location in the medium of propagation.

When the waves are in constructive interference then we get a resultant wave of maximum amplitude and vice-versa in case of destructive interference.

• For constructive interference the waves must have either no phase difference or a phase difference of nλ, where n is any natural number.

• For destructive interference the waves must have a phase difference of n×0.5λ, where n is any odd number.