GB/T 14365-2017 English Translated 英文版 翻译 Acoustics-Measurements of sound pressure level emitted by stationary road vehicles [China Vehicle Standard]

GB/T 14365-2017 English Translated Acoustics-Measurements of sound pressure level emitted by stationary road vehicles

Standard No.: GB/T 14365-2017
English Name: Acoustics-Measurements of sound pressure level emitted by stationary road vehicles
Chinese Name: 声学 机动车辆定置噪声声压级测量方法
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China & Standardization Administration of the People's Republic of China
Issued on: December 29, 2017
Implemented on: April 01, 2018
Superseding: GB/T 14365-1993 Acoustics-Measurement of noise emitted by stationary road vehicles
Language: English
File Format: PDF
Delivery: Immediate delivery

CONTENTS

Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Measuring Instrumentation
5 Acoustical environment, meteorological conditions and background noise
6 Measurement Methods
7 Measurements
8 Interpretation of Results
9 Measurement Uncertainty
10 Test report
Annex A (Informative) Technical Background Information
Annex B (Informative) Measurement uncertainty - Framework for uncertainty analysis based on ISO/IEC Guide 98-3
Bibliography

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)

3 TERMS AND DEFINITIONS

For the purpose of this standard, the following terms and definitions apply.



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