Thread: Exhaust dB data
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Old 12-07-2004, 02:38 PM   #8
Quack
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Society of Automotive Engineers (SAE) test procedure J1169 (May, 1998) is how it is to be tested.

it turns out to be 95db @ 20" (see page 4)
http://www.ci.kennewick.wa.us/City_Clerk/KMC/11-36.pdf
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