In Figure two speakers separated by distance dt = 2.00 m are in phase. Assume the amplitudes of the sound waves from the speakers are approximately the same at the listener's ear at distance d2 = 3.75 m directly in front of one speaker. Consider the full audible range for normal hearing, 20 Hz to 20 kHz.(a) What is the lowest frequency, fmin,1 that gives minimum signal (destructive interference) at the listener's ear? By what number must f min,1 be multiplied to get(b) The second lowest frequency f min,2 that gives minimum signal and(c) The third lowest frequency f min,3 that gives minimum signal?(d) What is the lowest frequency f min,1 that gives maximum signal (constructive interference) at the listener's ear? By what number must f min,1 be multiplied to get(e) The second lowest frequency f min,2 that gives maximum signal and(f) The third lowest frequency f min,3 that gives maximumsignal?

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Speakers Listener