Product Code:SAE J1492
Title:Measurement of Light Vehicle Stationary Exhaust System Sound Level Engine Speed Sweep Method
Issuing Committee:Light Vehicle Exterior Sound Level Standards Committee
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:驴measurements at the manufacturing stage驴measurements at official testing stations驴measurements at roadside testing