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SAE J2889/1_201511

Current

Current

The latest, up-to-date edition.

Measurement of Minimum Noise Emitted by Road Vehicles

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-11-2015

€137.83
Excluding VAT

1. SCOPE
2. REFERENCES
3. DEFINITIONS
4. SYMBOLS AND ABBREVIATED TERMS
5. INSTRUMENTATION
6. ACOUSTIC ENVIRONMENT, METEOROLOGICAL
   CONDITIONS, AND BACKGROUND NOISE
7. TEST PROCEDURES
8. TEST REPORT
9. NOTES
APPENDIX A - INFORMATION ON DEVELOPMENT OF
             SAE J2889-1
APPENDIX B - DEVELOPMENT OF FREQUENCY SHIFT
             INFORMATION
APPENDIX C - RELEVANCE OF OBJECTIVE ACOUSTIC
             MEASUREMENTS TO PEDESTRIAN SAFETY

Describes an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.

DocumentType
Standard
Pages
28
PublisherName
SAE International
Status
Current
Supersedes

This SAE Standard is derived from SAE J2805 and specifies an engineering method for measuring the sound emitted by M and N category road vehicles at standstill and low speed operating conditions.. The specifications reproduce the level of sound which is generated by the principal vehicle sound sources consistent with stationary and low speed vehicle operating conditions relevant for pedestrian safety. The method is designed to meet the requirements of simplicity as far as they are consistent with reproducibility of results under the operating conditions of the vehicle.The test method requires an acoustic environment which is only obtained in an extensive open space or in special designed indoor facilities replicating the conditions of an extensive open space. Such conditions usually exist during:Measurements of vehicles for regulatory certification.Measurements at the manufacturing stage.Measurements at official testing stations.The results obtained by this method give an objective measure of the sound emitted under the specified conditions of test. It is necessary to consider the fact that the subjective appraisal of the annoyance, perceptibility, and/or detectability of different motor vehicles or classes of motor vehicles due to their sound emission are not simply related to the indications of a sound measurement system. As annoyance, perceptibility, and/or detectability are strongly related to personal human perception, physiological human condition, culture, and environmental conditions, there are large variations and therefore these terms are not useful as parameters to describe a specific vehicle condition.Spot checks of vehicles chosen at random rarely occur in an ideal acoustic environment. If measurements are carried out on the road in an acoustic environment which does not fulfill the requirements stated in this SAE Standard, the results obtained may deviate appreciably from the results obtained using the specified conditions.In addition, this standard provides an engineering method to assess the performance of external sound generation systems intended for the purpose of providing acoustic information to pedestrians on a vehicle’s operating condition. This information is reported as objective criteria related to the external sound generation system’s sound pressure level, frequency content, and changes in sound pressure level and frequency content as a function of vehicle speed. As such, these measures can provide pedestrians with information on the location, speed, direction of travel, acceleration, and deceleration behavior of a vehicle. Annex A contains background information relevant in the development of this SAE Standard.

BS ISO 16254:2016 Acoustics. Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation. Engineering method
ISO 16254:2016 Acoustics — Measurement of sound emitted by road vehicles of category M and N at standstill and low speed operation — Engineering method

ISO 10844:2014 Acoustics Specification of test tracks for measuring noise emitted by road vehicles and their tyres
IEC 60942:2003 Electroacoustics - Sound calibrators
ISO 26101:2017 Acoustics Test methods for the qualification of free-field environments
ISO 362-1:2015 Measurement of noise emitted by accelerating road vehicles — Engineering method — Part 1: M and N categories
IEC 61260-1:2014 Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications
SAE J2805_201511 Measurement of Noise Emitted by Accelerating Road Vehicles
SAE J1715_201410 Hybrid Electric Vehicle (HEV) and Electric Vehicle (EV) Terminology
ANSI/ASA S1.11 PART 1 : 2014 ELECTROACOUSTICS - OCTAVE-BAND AND FRACTIONAL-OCTAVE-BAND FILTERS - PART 1: SPECIFICATIONS

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