09-04-2021, 08:30 AM
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#4
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Senior Member
Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
Posts: 6,485
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Re: Exhaust Noise - Legislation - SEMA
Sound Level Engine Speed Sweep Method J1492
Quote:
- Measurement of Light Vehicle Stationary Exhaust System Sound Levels -
This SAE Recommended Practice establishes the test procedure, environment, and instrumentation to be used for measuring the exterior exhaust sound level for passenger cars, multipurpose vehicles, and light trucks under stationary conditions providing a continuous measure of exhaust system sound level over a range of engine speeds.
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SOURCE - https://www.sae.org/standards/content/j1492_200810/
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We should have a contest. The player has to start at the very last post of a thread & then try to guess what the OP's original question was about ... 
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