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Sound Interference

  1. Feb 5, 2008 #1
    I am having trouble with this problem. If anyone can help it will be greatly appreciated.

    Speakers A and B are vibrating in phase. They are directly facing each other, are 8 m apart, and are each playing a 77 Hz tone. The speed of sound is 343 m/s. On the line between the speakers there are three points where constructive interference occurs. What are the distances of these three points from speaker A?

    near, farther, and farthest.
  2. jcsd
  3. Feb 5, 2008 #2


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    what's the wavelength?
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