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See Chinese contents: GB/T 14365-1993 GB/T 14365-1993: Acoustics. Measurement of noise emitted by stationary road vehicles
This Standard applies to the measurement of noise emitted by all kinds of stationary road vehicles. Stationary means that the vehicle is not running, the engine is in unladen operation state. The measurement data obtained by the method specified in this Standard can be used to evaluate and inspect the main noise source of motor vehicles - exhaust noise and engine noise level. The date directly obtained by this method can not characterize the maximum noise level of vehicles when running.
