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Tracy Crook wrote:
Interesting stuff Ernest, Hope this turns up some good results.
I haven't had time to really go into muffler theory so I've just observed what the car & motorcycle makers do. Based on these observations only, I've concluded that unless we come up with a new concept, there is no substitute for size and cubic inches. The phononic devices ARE a new concept. Most of the data I've been able to find has been abstracts of peer-review research publications. The three links I provided earlier are the only publicly available data I've turned up. Even still, conceptually it's a fairly simple construct. The devilish part, as Bill alluded to, is that it has to be tuned. The papers I've read lead me to believe that I have some idea of the magnitude of the dimensions necessary, and I've sketched out a way to run a lot of tests of different configurations easily. Nothin' left to do but the doin'. 8*)
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