Exhaust Noise
19 October 2004, 12:34 PM
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Exhaust Noise
I've purchased a Sound level meter, so I can measure the db level of my exhaust.
My idea was to check my noise level before I get to a track, so i can sort any issues before hand.
What I need to know is how do they measure your exhaust noise at a track, ie distance from tailpipe, revs, A or C level, anything else I've missed?
Thanks in advance
Mike
My idea was to check my noise level before I get to a track, so i can sort any issues before hand.
What I need to know is how do they measure your exhaust noise at a track, ie distance from tailpipe, revs, A or C level, anything else I've missed?
Thanks in advance
Mike
Last edited by Myk; 19 October 2004 at 12:35 PM. Reason: Cause I'm a numpty
20 October 2004, 10:17 AM
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As mart said, 45 deg angle, some people use 0.5m distance, others 1m... 
Make sure you use the A-weighting, and make sure whoever measures you at a track uses the A-weighting too! Bear in mind a cheapo sound level meter should only be used as a guide, and not as a definitive answer. Think the speed used is 3/4 of maximum engine speed or something like that.
Make sure you use the A-weighting, and make sure whoever measures you at a track uses the A-weighting too! Bear in mind a cheapo sound level meter should only be used as a guide, and not as a definitive answer. Think the speed used is 3/4 of maximum engine speed or something like that.
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