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What is acoustic lenth

  1. Feb 18, 2013 #1
    What is acoustic length in a pipe/tube? On a physics lab, the lab write up mentions it but it doesn't explain what it is. I know it's give by L = λ/4 and higher ones will be odd multiples of the first one. But what does this actually mean and what is it for? I looked it up but couldn't find any information.
    Some help would be appreciated.
  2. jcsd
  3. Feb 19, 2013 #2


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    hi! polaris90! :smile:

    acoustic length of a tube is an imaginary measurement that's longer than the actual length …

    you put it into equations (instead of the actual length), and the equations work! :wink:

    see eg http://www.flutopedia.com/acoustic_length.htm for details, and lots of pretty pictures​
  4. Feb 20, 2013 #3
    ok, thank you. That was very helpful
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