New Standard from Last Update.

1. SCOPE

This standard specifies the method for measuring the exterior noise emitted by motor vehicles of categories M and N as defined in IS 14272 in moving condition. The specifications in this standard are intended to reproduce the sound levels which are generated by vehicles during normal driving in urban traffic.This standard provides, as well, additional sound emission provisions for vehicles of categories M1 and N1 referring to driving conditions with extreme accelerations in an extended speed range representative for urban and suburban traffic.

2. REFERENCES

The following standards contain provisions, which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were 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.

IS 14272 : 2011 Automotive vehicles - Types - Terminology (first revision)

IS 14599 : 1999 Automotive vehicles - Performance requirements (measurement of power, SFC, opacity) of positive and compression ignition engines - Method of test

ISO 362-3 : 2016 Measurement of noise emitted by accelerating road vehicles - Engineering method: Part 3 Indoor testing M and N categories

ISO 612 : 1978 Road vehicles - Dimensions of motor vehicles and towed vehicles - Terms and definitions

ISO 10844 : 2014 Acoustics - Specification of test tracks for measuring noise emitted by road vehicles and their tyres

IEC 60942 : 2017 Electroacoustics - Sound calibrators

IEC 61672-1 : 2002 Electroacoustics - Sound level meters: Part 1 Specifications

IEC 61672-3 : 2013 Electroacoustics - Sound level meters: Part 3 Periodic tests