Re: QUIET EXHAUSTS

Posted by shinyribs on Mar 15, 2012; 11:24pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/QUIET-EXHAUSTS-tp3824396p3830385.html

seestheday wrote

Errr... I'm pretty sure that the reason the glass packing works is because it physically absorbs the sound waves and transfers it into kinetic energy.  The kinetic waves would cancel each other out to some extent, and the rest would be transferred into the motorcycle, but it's so small you won't notice it because the engine  alone generates much more kinetic movement (vibrations etc).

If it was only in-phase/out-of-phase cancellation then you'd have some coordinates in space that were quiet, but if you moved your head a little bit it would be extremely loud (think of dropping two pebbles into still water and watching the ripples interact with eachother, but mapped into 3-d space).

Now if you'll excuse me, I'm going to put on my pocket protector and go back to my game of dungeons and dragons.

What the ...?!?! You just blew my mind. I dont what you said,but it made sense. Sarge you are right about my steel wool rusting.It was a cheap shot at something that might not work.More of a test that actually panned out,so it stayed in.When it falls out 'glass will go back.I never knew about the bronze steel wool either. Very cool. I can get my hands on a lot of aluminum turnings from a machine shop a buddy works at. It'll be free so I'll may go that route. I just feel that the fiberglass should be quieter than any metal. I dont have any uber-scientific reason why that is,just a thought. Maybe I should consult Prof. Sees' on this one