Quote:
Originally Posted by Jayphil
This is to cancel a specific frequency (drone frequency) and not tone down the entire exhaust sound. It is working like noise cancelling ear plugs but only effective for a short range of frequencies.
For example all frequencies from 40hz to 600hz where from 55 to 80 dB at 1800RPM except 100hz was 95db. So I calculated the length of the pipe to cancel 100hz sound and now the 100hz frequency has the around the same dB has the others.
Clearer now?
|
Yes! Lol. So what happens to the flow of the exhaust when it goes to those j-pipes does it fill up with combustion and sit there since there's no egress until the car is turned off or does it leak thru when the car is idling?