SAE J1477_202410

This SAE Recommended Practice establishes the test procedure, environment, instrumentation, and data analyses for comparing interior sound level of passenger cars, multipurpose vehicles, and light trucks having gross vehicle weight rating (GVWR) of 4540 kg (10 000 lb) or less. The test procedure is characterized by having fixed initial conditions (specified initial vehicle speed and gear selection at the starting point on the test site) to obtain vehicle interior sound measurement during road load operation over various road surfaces at specified constant speeds. The measurement data so derived is useful for vehicle engineering development and analysis. SAE J1477 is being stabilized because the Light Vehicle Exterior Sound Level Standards Committee has determined that the using community is moving towards newer technology and would like to alert users that this new technology exists which may want to be considered for new design. Developments in vehicle technology and the need to have test procedures applicable to human noise dose exposure has led to the revision of ISO 5128:1980, on which SAE J1477 was based. Users of SAE J1477 needing provisions for different vehicle technologies or wish to understand the human dose response related to long term fatigue, task attentiveness, or hearing damage, are directed to ISO 5128:2023.