There are two speakers at the front of the room. Each is outputting a 250Hz pure

Question

There are two speakers at the front of the room. Each is outputting a 250Hz pure tone. For each of the following situations, will you hear constructive interference (a loud noise) or destructive interference (soft or no noise). represents the wavelength of the 250Hz tone.

You are 3 away from speaker A; 2.5 away from speaker B and at the speakers the waves are exactly out of phase.
You are 3 away from speaker A; 2 away from speaker B and at the speakers the waves are exactly out of phase.

You are 3.5 away from speaker A; 3 away from speaker B and at the speakers the waves are exactly in phase.

You are 2 away from speaker A; 3 away from speaker B and at the speakers the waves are exactly in phase.

Explanation / Answer

for the waves exactly out of phase at the speakers, for constructive interference there should be distance difference of (2n-1)/2 and for destructive interference it should be n.

a) constructive

b) destructive

for the waves exactly in the phase at the speakers, for constructive interference there should be distance difference of n and for destructive interference it should be (2n-1)/2.

c) destructive

d) constructive

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