Limits and measurement methods for noise emitted by accelerating motor vehicles
1 Scope
This Standard specifies the limits for noise emitted by newly manufactured motor vehicles during acceleration.
This Standard specifies the methods for measuring the noise emitted by newly manufactured motor vehicles during acceleration.
This Standard applies to category M and N ) vehicles.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. Upon publication of this standard, all editions listed are valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB 3785-83 Electric, sonic properties and measuring methods for sound level meters
GB/T 15173-94 Sound calibrators
GB/T 12534-90 Motor vehicles - General rules of road test method
ISO 10844-1994 Acoustics - Specification of test tracks for the purpose of measuring noise emitted by road vehicles )
ISO 10534-1996 Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes - Method using standing wave ratio3)
GB/T 17692-1999 Measurement methods of net power for automotive engines
3 Definitions
For the purposes of this standard, the following definitions apply.
3.1 Vehicle type
Foreword I
1 Scope
2 Normative references
3 Definitions
4 Noise limit
5 Measurement methods
Annex A (Normative annex) Measurement methods for noise emitted by accelerating motor vehicles
Appendix AA Requirements of test tracks for noise measurement
Appendix AB Data sheet for the measurement of noise emitted by accelerating motor vehicles
