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What is acoustic lenthby polaris90
Tags: acoustic length 
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#1
Feb1813, 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. 


#2
Feb1913, 04:07 AM

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P: 26,148

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 


#3
Feb2013, 06:56 PM

P: 45

ok, thank you. That was very helpful



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