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Homework Help: Acoustic Resonance

  1. May 9, 2006 #1
    I need help with a question about acoustic resonance.

    Sound of wavelength 20cm is produced at one end of a 32 cm long tube. Is it possible for resonance to be produced?
  2. jcsd
  3. May 9, 2006 #2


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    Homework Helper

    The condition for re-sonance is for a doubly-reflected wave
    (now traveling the same direction as the original wave)
    to be "almost in-step" with that original wave
    "close to" an integer number of wavelengths back.

    "close to" effectively means closer than 1/4 wavelength,
    because 1/2 wavelength excess leads to total cancellation.

    Did they say whether the ends of the tube were open or closed?
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