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Question on finding the frequency of a sound wave

  1. Apr 20, 2010 #1
    1. The problem statement, all variables and given/known data
    The distance between a node and the nearest antinode of a standing sound wave in air is 7.55 m. What is the frequency of this wave? (Use 343 m/s as the speed of sound in air.)


    2. Relevant equations
    velocity = wavelength * frequency


    3. The attempt at a solution
    I started by trying to find the wavelength which I deemed to be 7.55*2 = 15.1
    I then just plugged it into the equation above, which got me to:
    343 = 15.1 * frequency
    I found the frequency to be 22.72 Hz, but apparently it's wrong and I don't understand why.
     
  2. jcsd
  3. Apr 20, 2010 #2

    rl.bhat

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    Homework Helper

    The distance between a node and the nearest antinode of a standing sound wave is λ/4.
     
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