There are two speakers at the front of the room. Each is outputting a 250Hz pure
ID: 2036903 • Letter: T
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? away from speaker B and at the speakers the waves are exactly out of phase You are 2.5? away from speaker A; 3? 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 Submit Answer Tries 0/10Explanation / Answer
Step 1 of 2
When the two speakers are at the front of the room, with 250Hz tone,
If the two sound waves of the speaker are in phase, and when they reach the point, there will be a 'peak' and a 'trough' together for both the speakers, which leads to constructive ineterference.
If the two sound waves are out of phase, there is one 'peak' and the other one 'trough', which gives destructive interference.
Step 2 of 2
So,
Case 1: If you are 3? away from speaker A; 4? away from speaker B and at the speakers the waves are exactly out of phase.
Destructive ineterference.
Case 2: If you are 3.5? away from speaker A; 3? away from speaker B and at the speakers the waves are exactly out of phase.
Constructive Interference.
Case 3: If you are 3.5? away from speaker A; 3? away from speaker B and at the speakers the waves are exactly in phase.
Destructive interference.
Case 4: If you are 4? away from speaker A; 5? away from speaker B and at the speakers the waves are exactly in phase.
Constructive interference.
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