Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Frequency of sound wave in air

  1. May 27, 2006 #1
    Velocity of sound waves in air is 330 m/sec. For a particular sound in air a path difference of 40 cm is equivalent to a phase difference of 1.6 pi. What is the frequency of this wave?
    I solved it in the following way:
    Let d(phi) = phase difference, dy = path difference
    Here d(phi) = 1.6 pi, dy = 0.4 m, lamda = wavelength
    d(phi) = [2(pi)/lamda] x dy
    Solving I get,
    Lamda = 0.5 metre
    Frequency = v/lamda
    = 660 Hz
    Is it right?
  2. jcsd
  3. May 27, 2006 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Looks good to me.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook