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Air Column - Resononce

  1. Oct 19, 2004 #1
    Hi. The experiment is set up so that a loudspeaker is suspended oer a column of air. When sound is sent through the air column, the particls of air will vibrate. The amplitude is related to the loudness of the sound so when the particles vibrate at their maximum amplitude (resonance) the sound will be at its loudest.

    Would you expect the resonant frequency to be higher or lower of the air-column was longer?

    I would say the resonant frequency to be higher because the natural frequency of the air particles would be higher, is this correct?
  2. jcsd
  3. Oct 19, 2004 #2
    think about instruments. how much tube is there for a flute or a trumpet?how much tube is there for a trombone or a tuba? which is the bigger instrument: alto saxophone or bass saxophone?
  4. Oct 19, 2004 #3
    the longer the tube, the lower the pitch of sound, so lower frequency.
    So, the short the air column, the higher the frequency. Is this right?
    Last edited: Oct 20, 2004
  5. Oct 20, 2004 #4
    Can someone please help?
  6. Oct 20, 2004 #5

    Doc Al

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    Staff: Mentor

    Right. The fundamental frequency is inversely proportional to the length of the tube.
  7. Oct 20, 2004 #6
    Thanks Doc Al.
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