How Does Speaker Placement Affect Sound Frequency Detection?

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Arnoldjavs3
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Hi I am having a rough time with this questoin .

Homework Statement


Question: A student enters Best Buy prepared to buy a pair of speakers. Before he does so, he conducts an experiment with them. He places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At that point he notices a quiet “spot”. If the speed of the sound in the room is known to be 350 m/s, calculate the possible frequencies being played by the speakers.



Homework Equations


PD = (n-1/2) λ



The Attempt at a Solution


f = v/(lambda) = 350/6(2n + 1) = 58.33/(2n+1) ... n belongs to integer
 
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PD = (n-1/2) λ ... PD = 0.3