EN ISO 11819-1:2001

SLOVENSKI STANDARD
01-september-2002
Acoustics - Measurement of the influence of road surfaces on traffic noise - Part 1:
Statistical Pass-By method (ISO 11819-1:1997)
Acoustics - Measurement of the influence of road surfaces on traffic noise - Part 1:
Statistical Pass-By method (ISO 11819-1:1997)
Akustik - Messung des Einflusses von Straßenoberflächen auf Verkehrsgeräusche - Teil
1: Statistisches Vorbeifahrtverfahren (ISO 11819-1:1997)
Acoustique - Mesurage de l'influence des revetements chaussées sur le bruit émis par la
circulation - Partie 1: Méthode statistique au passage (ISO 11819-1:1997)
Ta slovenski standard je istoveten z: EN ISO 11819-1:2001
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
93.080.20 Materiali za gradnjo cest Road construction materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11819-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2001
ICS 17.140.30
English version
Acoustics - Measurement of the influence of road surfaces on
traffic noise - Part 1: Statistical Pass-By method (ISO 11819-
1:1997)
Acoustique - Mesurage de l'influence des revêtements Akustik - Messung des Einflusses von Straßenoberflächen
chaussées sur le bruit émis par la circulation - Partie 1: auf Verkehrsgeräusche - Teil 1: Statistisches
Méthode statistique au passage (ISO 11819-1:1997) Vorbeifahrtverfahrtverfahren (ISO 11819-1:1997)
This European Standard was approved by CEN on 11 June 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11819-1:2001 E
worldwide for CEN national Members.

Foreword
The text of the International Standard from Technical Committee ISO/TC 43 "Acoustics" of the
International Organization for Standardization (ISO) has been taken over as an European
Standard by Technical Committee CEN/TC 227 "Road materials", the secretariat of which is held
by DIN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by February 2002, and conflicting national
standards shall be withdrawn at the latest by February 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
NOTE FROM CMC The foreword is susceptible to be amended on reception of the German language
version. The confirmed or amended foreword, and when appropriate, the normative annex ZA for the
references to international publications with their relevant European publications will be circulated with the
German version.
Endorsement notice
The text of the International Standard ISO 11819-1:1997 has been approved by CEN as a
European Standard without any modification.
INTERNATIONAL
IS0
STANDARD
11819-I
First edition
1997-09-l 5
Acoustics -
Measurement of the influence
of road surfaces on traffic noise -
Part 1:
Statistical Pass-By method
Acoustique - Mesurage de /‘influence des rev&tements de chaus&es sur
le bruit 4mis par la circulation -
Partie 1: Mgthode statistique au passage
Reference number
IS0 118194:1997(E)
IS0 11819=1:1997(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be represented
on that committee. International organizations, governmental and non-
governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 118194 was prepared by Technical Committee
ISOmC 43, Acoustics, Subcommittee SC 1, Noise.
IS0 11819 consists of the following parts, under the general title
Acoustics - Measurement of the influence of road surfaces on traffic
noise:
- Part I: Statistical Pass-By method
- Part 2: Close-proximity method
Annexes A to F of this part of IS0 11819 are for information only.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be
reproduced or utilized in any form or by any means, electronic or mechanical, including
photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Internet central @ iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
ISO11819-1:1997( E)
Introduction
The emission and propagation of road traffic noise greatly depend on road surface characteristics,
notably on texture and porosity. Both these characteristics influence the generation of tyre/road noise
and, in addition, the porosity can influence the propagation of sound, particularly when the propagation
takes place close to the surface. Power unit noise, which is usually generated at a greater height
above the road surface than tyre/road noise, may also be affected during propagation by the porosity
characteristics of the road surface. These effects lead to differences in sound levels, associated with a
given traffic flow and composition, from different road surfaces of up to 15 dB, which can have a
substantial impact on the environmental quality alongside a road.
It is therefore important to be able to measure this influence by a standardized method and to arrive at
a quantitative ranking of road surfaces with respect to traffic noise. This part of IS0 11819 offers such
a method, the objective of which is to satisfy a need expressed by road planners, road administrators,
contractors, manufacturers of so-called “low-noise surfaces” and by other parties concerned with the
prediction and control of road traffic noise.

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INTERNATIONAL STANDARD @ Iso IS0 118194 : 1997(E)
- Measurement of the influence of road surfaces on
Acoustics
traffic noise -
Part 1:
Statistical Pass-By method
Scope
This part of IS0 11819 describes a method of comparing traffic noise on different road surfaces for
various compositions of road traffic for the purpose of evaluating different road surface: types. Sound
levels representing either light or heavy vehicles at selected speeds are assigned to a certain road
surface. The method is applicable to traffic travelling at constant speed, i.e. free-flowingconditions at
posted speeds of 50 km/h and upwards. For other driving conditions where traffic is not free-flowing,
such as at junctions and where the traffic is congested, the road surface is of less importance.
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 IS0 11819 to suggest such criteria.
The Statistical Pass-By (SPB) method is intended to be used essentially for two main purposes. First it
may be used to classify surfaces in typical and good condition as a type according to their influence on
traffic noise (surface classification) and, secondly, it may be used to evaluate the influence on traffic
noise of different surfaces at particular sites irrespective of condition and age. This ,tatter type of
application may be useful for example where a road is to be resurfaced and “before” and “after”
measurements are required in order to assess the differences in traffic noise followingresurfacing.
generally be used for approval of works at any given site.
Clause 4 gives a general description of the SPB method.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions
of this part of IS0 11819. At the time of publication, the editions indicated were valid. All standards are
subject to revision, and parties to agreements based on this part of IS0 11819 are encouraged to
investigate the possibility of applying the most recent editions of the standards indicated below.
Members of IEC and IS0 maintain registers of currently valid International Standards.
IS0 10844:1994, Acoustics - Test surface for road vehicle noise measurement.
Characterization of pavement texture using surface profiles - Part
IS0 13473-l :1997, Acoustics -
1: Determination of mean profile depth.
IEC 60651: 1979, Sound /eve/ meters.
I EC 60942: 1988, Sound calibrators.
I EC 61260: 1995, Hectroacoustics - Octave-band and fractional-octave-band filters.
IS0 118194 :1997(E)
3 Definitions
For the purposes of this part of IS0 11819, the following definitions apply.
Traffic noise, vehicle noise, tyrekoad noise and power unit noise
3.1
3.1 .l traffic noise
overall noise emitted by the traffic running on the road under study
3.1.2 vehicle noise
total noise from an individual vehicle, the two major components of which are power unit noise (3.1.4)
and tyre/road noise (3.1.3)
3.1.3 tyre/road noise
noise generated by the tyre/road interaction
3.1.4 power unit noise
noise generated by the vehicle engine, exhaust system, air intake, fans, transmission, etc.
Statistical Pass-By (SPB) method
3.2
measurement procedure designed to evaluate vehicle and traffic noise generated on different sections
of road surface under specific traffic conditions
NOTE - The measurements are taken from a great number of vehicles operating normally on the road. Results
obtained using this procedure are normalized to standard speeds according to the category or type of road
being considered.
3.3 Road speed categories
Three categories of roads are defined with respect to the range of speeds at which the traffic flows
and these are usually associated with certain areas (urban, suburban, rural, etc.).
3.3.1 “low” road speed category
conditions which relate to traffic operating at an average speed of 45 km/h to 64 km/h
NOTE - These conditions are usually associated with urban traffic.
3.3.2 “medium” road speed category
conditions which relate to traffic operating at an average speed of 65 km/h to 99 km/h
NOTE - These conditions are mostly found in suburban areas or on rural highways.
3.3.3 “‘high” road speed category
conditions which relate to cars operating at an average speed of 100 km/h or more; heavy vehicles
may operate at lower average speed due to speed restrictions
NOTE - These conditions are usually associated with motorway traffic in rural or suburban areas.
IS0 11819-l : 1997(E)
3.4 Vehicle categories
A vehicle category consists of vehicles which have certain common features easy to identify in the
traffic stream, such as the number of axles and the size. The common (features are assumed to
correspond to similarities in their sound emission when driven under the same operating conditions.
The following vehicle categories are considered to be sufficient for Tdescription of the noise
characteristics of road surfaces and are used in this part of IS0 11819 (see-also annex A).
3.4.1 Category No. 1 - cars
passenger cars excluding other light vehicles
3.4.2 Category No. 2 - heavy vehicles
all trucks, buses and coaches with at least two axles and more than four wheels
NOTE - This category consists of Categories 2a and 2b together.
3.4.2.1 Category No. 2a - dual-axle heavy vehicles
trucks, buses and coaches with two axles and more than four wheels
3.4.2.2 Category No. 2b - multi-axle heavy vehicles
trucks, buses and coaches with more than two axles
35 . maximum sound level
highest sound pressure level recorded by the measuring instrument during1.a vehicle pass-by, using
the appropriate frequency weighting and time weighting F, for vehicles which are acoustically
identifiable, i.e. are not significantly disturbed by other vehicles (see also 7.2)
Vehicle Sound Level, Lveh
3.6
maximum A-weighted sound pressure level determined at a reference speed:from a regression line of
the maximum A-weighted sound pressure level versus the logarithm of speed, calculated for each
vehicle category
Statistical Pass-By Index (SPBI)
3.7
noise index for comparison of road surfaces, that is based on the Vehicle Sound Levels and takes into
account the mix a
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