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Old 12-06-2011, 10:59 PM
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GearNut GearNut is offline
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Join Date: Aug 2009
Location: San Diego, Kaliforgnia
Posts: 5,106
Default Re: what did you do to your motor bike today?

Originally Posted by frozenveinz View Post
Also the exhaust note is awesome. The longer the can is sticking out from pipe the deeper it sounds(no clue why, someone educate me).
One word, resonance.
The sound gets deeper for the same reason that a trombone's sound gets lower when the tuning slide is slid out. Longer tube = lower note.
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