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What is acoustic lenth

by polaris90
Tags: acoustic length
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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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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 for details, and lots of pretty pictures
Feb20-13, 06:56 PM
P: 45
ok, thank you. That was very helpful

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