ISO 11819-2:2017 - $209.00   BUY NOW

Acoustics - Measurement of the influence of road surfaces on traffic noise - Part 2: The close-proximity method

ISO 11819-2:2017 Publication Description:

ISO 11819-2:2017 specifies a method of evaluating different road surfaces with respect to their influence on traffic noise, under conditions when tyre/road noise dominates. The interpretation of the results applies to free-flowing traffic travelling on essentially level roads at constant speeds of 40 km/h and upwards, in which cases tyre/road noise is assumed to dominate (although in some countries it is possible that tyre/road noise does not dominate at 40 km/h when the proportion of heavy vehicles is high). For other driving conditions where traffic is not free-flowing, such as at junctions or under heavy acceleration, and where the traffic is congested, the influence of the road surface on noise emission is more complex. This is also the case for roads with high longitudinal gradients and a high proportion of heavy vehicles.

A standard method for comparing noise characteristics of road surfaces gives road and environment authorities a tool for establishing common practices or limits as to the use of surfacings meeting certain noise criteria. However, it is not within the scope of this document to suggest such criteria.

ISO 11819-1 defines another method: the statistical pass-by (SPB) method. The close-proximity (CPX) method specified in the present document has the same main objectives as the SPB method, but is intended to be used specifically in applications that are complementary to it, such as:

- noise characterization of road surfaces at almost any arbitrary site, with the main purpose of checking compliance with a surface specification (an example for conformity of production is suggested in Reference [1]);

- checking the acoustic effect of maintenance and condition, e.g. wear of and damage to surfaces, as well as clogging and the effect of cleaning of porous surfaces;

- checking the longitudinal and lateral homogeneity of a road section;

- the development of quieter road surfaces and research on tyre/road interaction.

NOTE This document does not describe the conditions of application for formal purposes of the measurement with the CPX method. Such conditions may be defined in other standards or legal texts. However, suggestions for the applicability of ISO 11819-1 and this document are provided in Annex D.

Measurements with the CPX method are faster and more practical than with the SPB method, but are more limited in the sense that it is relevant only in cases where tyre/road noise dominates and power unit noise can be neglected. Furthermore, it cannot take heavy vehicle tyre/road noise into account as fully as the SPB method can, since it uses a light truck tyre as a proxy for heavy vehicle tyres and does not take power unit noise into account.

The CPX method specified in this document is intended to measure the properties of road surfaces, not the properties of tyres. If the method is used for research purposes, to provide an indication of differences between tyres, the loads and inflations would normally be adjusted to other values than specified in this document.

International Classification for Standards (ICS)

ICS Classification Field ICS Field Sub-Group and Number
ICS-17-Metrology ICS Noise Emitted-Means-Transport (17.140.30)

ICS Related Standards

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$185.00 ISO 10844:2014 Acoustics - Specification of test tracks for measuring noise emitted by road vehicles and their tyres
$162.00 ISO 11819-1:1997 Acoustics - Measurement of the influence of road surfaces on traffic noise - Part 1: Statistical Pass-By method
$138.00 ISO 13325:2003 Tyres - Coast-by methods for measurement of tyre-to-road sound emission
$138.00 ISO 13472-1:2002 Acoustics - Measurement of sound absorption properties of road surfaces in situ - Part 1: Extended surface method
$138.00 ISO 13472-2:2010 Acoustics - Measurement of sound absorption properties of road surfaces in situ - Part 2: Spot method for reflective surfaces
$138.00 ISO 13473-1:1997 Characterization of pavement texture by use of surface profiles - Part 1: Determination of Mean Profile Depth
$103.00 ISO 13473-2:2002 Characterization of pavement texture by use of surface profiles - Part 2: Terminology and basic requirements related to pavement texture profile analysis
$68.00 ISO 13473-3:2002 Characterization of pavement texture by use of surface profiles - Part 3: Specification and classification of profilometers
$162.00 ISO/TS 13473-4:2008 Characterization of pavement texture by use of surface profiles - Part 4: Spectral analysis of surface profiles
$162.00 ISO 13473-5:2009 Characterization of pavement texture by use of surface profiles - Part 5: Determination of megatexture
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$68.00 ISO 2923:1996 Acoustics - Measurement of noise on board vessels
$209.00 ISO 3095:2013 Acoustics - Railway applications - Measurement of noise emitted by railbound vehicles
$103.00 ISO 3381:2005 Railway applications - Acoustics - Measurement of noise inside railbound vehicles
$209.00 ISO 362-1:2015 Measurement of noise emitted by accelerating road vehicles - Engineering method - Part 1: M and N categories
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$162.00 ISO 362-2:2009 Measurement of noise emitted by accelerating road vehicles - Engineering method - Part 2: L category
$209.00 ISO 362-3:2016 Measurement of noise emitted by accelerating road vehicles - Engineering method - Part 3: Indoor testing M and N categories
$45.00 ISO 5128:1980 Acoustics - Measurement of noise inside motor vehicles
$68.00 ISO 5129:2001 Acoustics - Measurement of sound pressure levels in the interior of aircraft during flight
$19.00 ISO 5129:2001/Amd1:2013 - Amendment 1
$103.00 ISO 5130:2007 Acoustics - Measurements of sound pressure level emitted by stationary road vehicles
$19.00 ISO 5130/Amd1:2012 Acoustics - Measurement of noise emitted by stationary road vehicles - Survey method - Amendment 1
$45.00 ISO 9645:1990 Acoustics - Measurement of noise emitted by two-wheeled mopeds in motion - Engineering method
$68.00 ISO/PAS 11819-4:2013 Acoustics - Method for measuring the influence of road surfaces on traffic noise - Part 4: SPB method using backing board
$149.00 ISO/PAS 17208-1:2012 Acoustics - Quantities and procedures for description and measurement of underwater sound from ships - Part 1: General requirements for measurements in deep water
$103.00 ISO/TS 11819-3:2017 Acoustics - Measurement of the influence of road surfaces on traffic noise - Part 3: Reference tyres
$103.00 ISO/TS 13471-1:2017 Acoustics - Temperature influence on tyre/road noise measurement - Part 1: Correction for temperature when testing with the CPX method
$45.00 ISO 18405:2017 Underwater acoustics - Terminology
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