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J1492 - Measurement of Light Vehicle Stationary Exhaust System Sound Level Engine Speed Sweep Method

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Document Number: J1492
Project Initiation: 10-08-2013
Sponsor Name: Noelle Baker
Title
Measurement of Light Vehicle Stationary Exhaust System Sound Level Engine Speed Sweep Method
Scope
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. This Recommended Practice applies only to road vehicles equipped with an internal combustion engine. The method is designed to meet the requirements of simplicity as far as they are consistent with reproducibility of results under the operating conditions of the vehicle. It is within the scope of this Recommended Practice to measure the stationary A-weighted sound pressure level during: - measurements at the manufacturing stage - measurements at official testing stations - measurements at roadside testing
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