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Post by grindingdisc on Jul 16, 2022 18:36:37 GMT 12
So i have been hearing all this Talk about world health organisation this and that,
Just wondering how they get away with running no mufflers in the U.S.A?
Are they in a world of their own?
Or is all of this a crock of …
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Post by Wingnut99 on Aug 6, 2022 7:45:35 GMT 12
 Depends which State in the US you are racing in. Sprintcars that race in various states use a noise valve like this. In one state the valve is wide open while across the border they have to comply with noise restrictions so the adjust the valve to comply with the local rule. |
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Post by Ned on Aug 7, 2022 16:42:25 GMT 12
One of the big issues when it comes to measuring noise is that the db scale is logarithmic. Therefore a 3db increase is double the starting value. A 10 db increase is 10 times the starting point. Therefore, the difference between 90 db and 95 db is about a 350% increase in sound pressure. On top of that, you would have to get a calibrated instrument to really be able to prove what you have. Really tricky if you are pushing the noise limits in the first place as Motorsport does. For me, bring it on, noise is part of the attraction however, on the flip side, my kids were alway required to wear earmuffs (until they got old enough to refuse)…
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