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GB/T 31884-2015 English PDF

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GB/T 31884-2015: Automatic detection system of tire/pavement noise using the on-board sound intensity method
Status: Valid
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Basic data

Standard ID GB/T 31884-2015 (GB/T31884-2015)
Description (Translated English) Automatic detection system of tire/pavement noise using the on-board sound intensity method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard P66
Classification of International Standard 93.080.30
Word Count Estimation 18,122
Date of Issue 2015-09-11
Date of Implementation 2015-12-01
Quoted Standard GB/T 191; GB/T 3241; JJG 992-2004; ASTM F2493
Regulation (derived from) National Standard Announcement 2015 No.25
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Standard specifies the technical requirements, test methods, inspection rules vehicle tire road noise automatic test system, signs, packaging, transportation and storage. This Standard applies to the use of vehicle sound intensity method of tire road noise automated test system.

GB/T 31884-2015: Automatic detection system of tire/pavement noise using the on-board sound intensity method


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Automatic detection system of tire/pavement noise using the on-board sound intensity method ICS 93.080.30 P66 National Standards of People's Republic of China Car tire road noise Automatic Test System Issued on. 2015-09-11 2015-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard by the National Traffic engineering facilities (highway) Standardization Technical Committee (SAC/TC223) and focal points. This standard was drafted. Jiangsu Transportation Research Institute Limited. Participated in the drafting of this standard. Beijing Oriental Institute of Technology vibration and noise, Chang Technology Co., Ltd. Jiangsu Suke. The main drafters of this standard. Sun Jun Huang, Song Shen, Zhang Rong, Sun Zhou, money Campbell, Hu Xiaoguang, Wang Can. Car tire road noise Automatic Test System

1 Scope

This standard specifies the vehicle tire road noise Automatic Test System (hereinafter referred to as the "System") technical requirements, test methods, inspection regulations Then, signs, packaging, transport and storage. This standard applies to the use of vehicle sound intensity method of tire road noise Automatic Test System.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 191 Packaging - Pictorial signs GB/T 3241 electro-acoustics octave and fractional octave filters JJG992-2004 sound intensity measuring instrument ASTMF2493 P225/60R1697S Radial Standard Reference Test Tire Size (StandardspecificationforP225 / 60R1697Sradialstandardreferencetesttire)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Sound intensity soundintensity Steady sound field within a certain time transient sound intensity average. Sound field at some point, and perpendicular to the direction of the particle velocity per unit area Sound on the unit of time can be called by the instantaneous sound intensity, which is a vector. Note. The units of watts per square meter (W/m2). 3.2 Sound intensity level soundintensitylevel Base 10 of 10 times the sound intensity and the reference sound intensity ratio of the number of sound intensity level in decibels (dB), the reference sound intensity in air is 1 × 10-12W/m2. 3.3 Sound pressure - residual intensity index pressure-residualintensityindex When the sound intensity probe in the acoustic field along its axis azimuth of sound intensity equal to 0 when the difference between the measured sound pressure level and sound system between the intensity level Value in decibels (dB). 3.4 Sound intensity probe soundintensityprobe Transducer system, its output signal can be processed to obtain a specific direction component of sound intensity. 3.5 Side by side pp probe side-by-sidep-pprobe Intensity probe consists of two amplitude and phase matching of the microphones consisting of two microphones are arranged side by side, and has a fixed pitch, e.g.

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