Dirtbike sound levels

[wanaride]

I remember finding a link on this site (years ago) to California OHV noise test data for dirtbikes. I can't find the data now. Does anyone know where that data is located?

 

[fatcat216]

Are you looking for the 1970's original data or something like this?

http://ohv.parks.ca.gov/pages/1140/files/ca ohv noise report wr 04-31-06.pdf
(Bike data on pages 32-33.)

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Here's a link to a more modern thread with some of the same procedures detailed. Ultimately the link I think you want to the actual data is provided by Okie in this thread.

http://www.dirtrider.net/forums3/showthread.php?t=134264


The link to the data that I would guess you are looking for:

http://ohv.parks.ca.gov/default.asp?page_id=23038

(Similar to CA pdf above, but as a website by brand.)
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Besides these threads, there are many pamphlets out in the WWW-wild detailing ways to correctly measure sound, as well as the regulations.

Another written which briefly briefly summarizes the issues surrounding noise testing .

http://www.dirtrider.net/forums3/showthread.php?t=150669&highlight=measuring+sound

This is a pretty old read-similar to the two stickies on killing our own sport and do I need a louder more powerful pipe.

http://www.dirtrider.net/forums3/showthread.php?t=36963

Just a teeny tip of what's hiding in DRN- I could easily create a whole forum just around sound/regulations/pipes and performance. Some good stuff hiding in those stacks.