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Two loudspeakers, an oscillator and constructive interference at a point?

  1. Nov 28, 2009 #1
    1. The problem statement, all variables and given/known data
    Two loudspeakers placed X meters apart are driven in phase by an audio oscillator, whose frequency
    range is 1300 Hz to 1800 Hz. A point P is located A meters from one loudspeaker and B meters from the
    other. The speed of sound is 344 m/s. What is the frequency produced by the oscillator, for which
    constructive interference of sound occurs at point P?

    2. Relevant equations


    3. The attempt at a solution
    I don't know how to start.
     
  2. jcsd
  3. Nov 28, 2009 #2

    Delphi51

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    Homework Helper

    For constructive interference, the distance from the two sources to P must be an equal number of wavelengths. Writing that as an equation would give you a start!
     
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