SOHCmyDOHC

I was just curious if anyone knows the specifics on the dB testing. I know the test is done per SAE J1169 and done from 20" from exhaust at 45 degrees and tested in neutral and at a specific RPM (75% of RPM at peak HP?)

I ask because I can get a hold of a dB meter from work and want to test my exhaust per cali law to see if it does pass. The dB meter is calibrated and stuff since my work has to comply w/ OSHA and their strict standards for hearing protection.

Thanks guys!