scope:

This Standard specifies the conditions for obtaining reproducible and comparable measurement results of levels and spectra of noise inside railway vehicles (hereafter referred to as "vehicle").

This Standard is applicable for:

- type test;

- periodic monitoring test;

The results may be used, for example:

- to characterise the noise inside these vehicles;

- to compare the internal noise of various vehicles on a particular track section.

This Standard describes tests during different operating conditions, i.e. constant speed running, accelerating, decelerating and standstill. It is not mandatory to perform tests at all conditions, and the chosen operating conditions Shall be in accordance with the agreement between the railway operator and the manufacturer (hereafter referred to as "between the purchaser and the manufacturer").

Infrasound and messages intelligibility are not treated in this Standard.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:

ISO 3381 : 2005 Railway applications - Acoustics - Measurement of noise inside railbound vehicles (MOD)

The symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/lEe Guide 21.