1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Science Advisor
    Homework Helper

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