what is acoustic lenth

by polaris90
Tags: acoustic length
polaris90 is offline
Feb18-13, 10:27 PM
P: 45
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.
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tiny-tim is offline
Feb19-13, 04:07 AM
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hi! polaris90!

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!
see eg http://www.flutopedia.com/acoustic_length.htm for details, and lots of pretty pictures
polaris90 is offline
Feb20-13, 06:56 PM
P: 45
ok, thank you. That was very helpful

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