GB/T 40625-2021
ActiveIndoor measurement methods for noise emitted by accelerating motor vehicles
汽车加速行驶车外噪声室内测量方法
Application Summary AI generated
This standard specifies indoor measurement methods for exterior noise emitted by accelerating motor vehicles, using a semi-anechoic chamber or chassis dynamometer to simulate on-road conditions. It is applied in automotive testing and certification contexts to evaluate vehicle pass-by noise levels under controlled laboratory environments, ensuring compliance with regulatory noise limits. The standard is relevant for passenger cars, trucks, and buses during type approval or production conformity assessments.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.