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      09-20-2019, 01:32 PM   #21
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Drives: E92 M3
Join Date: Apr 2018
Location: SoCal

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Quote:
Originally Posted by Aud Dr View Post
How do they measure "95 decibels"? Is this just up to the officer's judgement? What distance is the measurement taken from?
Technically it's not. The officer can give you a ticket based on their own belief that the exhaust is too loud. However, here is how the California Code of Regs (CCR) requires the test to be conducted. (Current as of 9/6/2019)

https://govt.westlaw.com/calregs/Doc...ta=(sc.Default)

This is also the way a state referee would test your car to sign it off.
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