ChinaAutoRegs｜GB/T 14365-2017 英文版/English/翻译/声学 机动车辆定置噪声声压级测量方法
Acoustics – Measurements of Sound Pressure Level Emitted by Stationary Road Vehicles
1 SCOPE
This Standard specifies the measurement procedure, environment and instrumentation for measuring the exterior sound pressure levels from road vehicles under stationary conditions, when the engine speed changes continuously. This Standard applies only to road vehicles of categories L, M and N equipped with internal combustion engines.
This Standard provides a simple and convenient measurement method by which the reproducibility of sound pressure levels can be made under the operating conditions of the vehicle.
This Standard applies to, when the vehicle is stationary, the methods for measuring the reproducibility of A-weighted sound pressure level within the following scope:
testing at type approval of vehicle;
testing at the manufacturing stage;
testing at the annual inspection;
testing at roadside sampling inspection.
This Standard specifies neither a method to check the exhaust sound pressure level when the engine is operated at realistic loads nor a method to check the compliance of exhaust sound pressure levels with the noise limits for categories of road vehicles.
Technical background information is given in Annex A.
2 NORMATIVE REFERENCES
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 3785.1-2010 Electroacoustics – Sound level meters – Part 1: Specifications
GB/T 6379 (All parts) Accuracy (trueness and precision) of measurement methods and results [ISO 5725 (All parts), IDT]
GB/T 15173-2010 Electroacoustics – Sound calibrators
ISO/ IEC Guide 98-3 Uncertainty of measurement – Part 3: Guide to the expression of uncertainty in measurement (GUM 1995)
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