Question

Two small speakers A and B are driven in step at 745 Hz by the same audio oscillator. These speakers both start out 4.50 m from the listener, but speaker A is slowly moved away. (See the figure (Figure 1)). The speed of sound in air is 344 m/s . Part A At what distance d will the sound from the speakers first produce destructive interference at the location of the listener? Express your answer in meters. Part B If A keeps moving, at what distance d will the speakers next produce destructive interference at the listener? Express your answer in meters. Part C After A starts moving away, at what distance will the speakers first produce constructive interference at the listener? Express your answer in meters.

          Two small speakers A and B are driven in step at 745 Hz by the
same audio oscillator. These speakers both start out 4.50 m from
the listener, but speaker A is slowly moved away. (See the figure
(Figure 1)). The speed of sound in air is 344 m/s . Part A At what
distance d will the sound from the speakers first produce
destructive interference at the location of the listener? Express
your answer in meters. Part B If A keeps moving, at what distance d
will the speakers next produce destructive interference at the
listener? Express your answer in meters. Part C After A starts
moving away, at what distance will the speakers first produce
constructive interference at the listener? Express your answer in
meters.

Added by Nicholas T.

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