My 914 is not OSHA compliant, Interior engine noise |
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My 914 is not OSHA compliant, Interior engine noise |
Coondog |
Nov 12 2019, 10:24 PM
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#1
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Advanced Member Group: Members Posts: 2,089 Joined: 24-September 15 From: Apple Valley Calif Member No.: 19,195 Region Association: Southern California |
OSHA says that noise over 85 dba requires a written hearing protection program.
Well I measured the sound level at 3000 RPM and I was at 87 dba. Running a 3.2 with Bens headers. Lots of free dba apps out there at no cost. Usually about +/- 1-2 error rate. OSHAs hearing protection rules say anything over 90 dba 8 hour TWA requires hearing protection. Of course these rules don’t apply to us but check out your sound measurements next time you take a drive........ (IMG:style_emoticons/default/driving.gif) Also know that 90 dba is twice as loud as 85dba. |
campbellcj |
Nov 14 2019, 08:14 AM
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#2
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I can't Re Member Group: Members Posts: 4,549 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
I know from experience that the type of air filter/cleaner setup impacts the interior sound a ton, particularly on a -6. On the extreme side there's the foam type filters like ITG, stock airbox and paper filter on the quieter side. Currently I've got Webers with flat-top K&Ns and zero sound insulation. My car is so loud even with the Dansk 1-out street muffler that I typically wear my custom earplugs when not in my helmet which has ear protection built-in.
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