SIST EN 17936:2024

Railway applications - Acoustics - Measurement of source terms for environmental noise calculations

The standard addresses the measurement of source terms for environmental noise calculation for rail traffic (including light rail). It is applicable to the measurement of in-service trains on operational tracks.
It is not applicable to type acceptance testing of rolling-stock or tracks.
The following rail traffic noise sources are in the scope:
- Rolling noise ;
- Traction noise ;
- Aerodynamic noise ;
- Impact noise (e.g. rail joints, switch & crossings, wheel flats) ;
- Bridge noise ;
- Squeal noise.
Noise from rail vehicles at standstill is included e.g.: engine idling and auxiliary equipment.
Noise from fixed installations (e.g.: stations, depots, electricity sub-stations) are not in the scope of this standard. Each source shall individually be characterized in terms of its frequency spectrum (up to one-third octave band details), source height and directivity. Rolling noise will then be described in terms of its generating wheel and rail roughness along with the vehicle and track transfer functions. Source terms will be specific to a vehicle and track type. The scope includes measurement procedures and conditions and sampling requirements.

Bahnanwendungen - Akustik - Messung der Quellterme für Umgebungslärmberechnungen

Applications ferroviaires - Acoustique - Mesurage des termes sources pour le calcul du bruit en environnement

Le présent document spécifie les procédures de mesure des termes sources afin de calculer le bruit en environnement généré par le trafic ferroviaire (y compris celui généré par la circulation des véhicules légers comme les tramways, métros, etc.). Il s'applique aux mesurages effectués sur les trains en service circulant sur voies en exploitation.
Il ne s'applique pas aux essais d'homologation des matériels roulants ou des voies ni à la détermination de termes sources pour les modèles dans le domaine temporel.
Le domaine d'application couvre les types suivants de sources de bruit de trafic ferroviaire :
-   le bruit de roulement ;
-   le bruit de traction et le bruit généré par les équipements ;
-   le bruit aérodynamique ;
-   le bruit d'impact (joints de rail, appareils de voie, méplats de roue, par exemple) ;
-   le bruit de freinage ;
-   le bruit des ponts ;
-   le bruit de crissement.
Le bruit généré par les véhicules ferroviaires à l'arrêt, comme le bruit généré par le moteur au ralenti et par les auxiliaires dans les gares de triage et les gares ferroviaires, est couvert par l'EN ISO 3095:2013 (procédures de mesure et conditions d'exploitation) et par l'EN ISO 3740:2019 et l'EN ISO 3744 (détermination des niveaux de puissance acoustique). Il ne relève donc pas du domaine d'application du présent document.
Le calcul de la propagation du son relève des modèles de propagation généralement normalisés, qui ne sont pas couverts par le présent document.
Le bruit généré par les installations fixes (gares, dépôts, postes d'alimentation électrique, par exemple) ne relève pas du domaine d'application du présent document.
Les termes sources sont spécifiques à un type de véhicule et un type de voie donnés. Le domaine d'application couvre les procédures et les conditions de mesurage, ainsi que les exigences relatives à l'échantillonnage.

Železniške naprave - Akustika - Merjenje osnovnih pogojev za izračun okoljskega hrupa

General Information

• Status: Published
• Public Enquiry End Date: 28-Feb-2023
• Publication Date: 11-Nov-2024
• ICS: 17.140.30 - Noise emitted by means of transport
• ICS: 93.100 - Construction of railways
• Technical Committee: IŽNP - Reilway applications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Nov-2024
• Due Date: 11-Jan-2025
• Completion Date: 12-Nov-2024
• Ref Project: EN 17936:2024 - Railway applications - Acoustics - Measurement of source terms for environmental noise calculations

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2024
Železniške naprave - Akustika - Merjenje osnovnih pogojev za izračun okoljskega
hrupa
Railway applications - Acoustics - Measurement of source terms for environmental noise
calculations
Bahnanwendungen - Akustik - Messung der Quellterme für
Umgebungslärmberechnungen
Applications ferroviaires - Acoustique - Mesurage des termes sources pour le calcul du
bruit en environnement
Ta slovenski standard je istoveten z: EN 17936:2024
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
93.100 Gradnja železnic Construction of railways
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17936
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2024
EUROPÄISCHE NORM
ICS 17.140.30; 93.100
English Version
Railway applications - Acoustics - Measurement of source
terms for environmental noise calculations
Applications ferroviaires - Acoustique - Mesurage des Bahnanwendungen - Akustik - Messung der Quellterme
termes sources pour le calcul du bruit en für Umgebungslärmberechnungen
environnement
This European Standard was approved by CEN on 2 September 2024.

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 CEN-CENELEC 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17936:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Instrumentation and calibration . 10
4.1 General. 10
4.2 Acoustic instrumentation . 10
4.3 Calibration of the acoustic instrumentation . 11
4.3.1 Temporary setup . 11
4.3.2 Automated calibration . 11
4.4 Non-acoustic instrumentation . 11
4.4.1 Time and duration . 11
4.4.2 Speed, track and direction . 12
4.4.3 Meteorological parameters . 12
4.4.4 Combined roughness . 12
4.4.5 Wheel and track parameters . 12
5 Approach to derive source terms . 12
5.1 General. 12
5.2 Procedure . 13
5.3 Directivity . 14
5.4 Distribution over source heights . 14
6 Measurement procedures . 14
6.1 General. 14
6.2 Rolling noise . 17
6.2.1 General. 17
6.2.2 Measurement steps . 17
6.2.3 Network and fleet roughness . 18
6.3 Traction and equipment noise . 18
6.3.1 General. 18
6.3.2 Source level for traction/equipment noise following EN ISO 3095:2013 . 19
6.3.3 Source level for traction/equipment noise using statistical data collection . 19
6.3.4 Source separation . 19
6.4 Impact noise . 20
6.5 Curve squeal . 20
6.6 Bridge noise . 21
6.7 Braking noise. 22
6.7.1 General. 22
6.7.2 Source level for braking noise following EN ISO 3095:2013 . 22
6.7.3 Source level for braking noise at arbitrary sites . 22
6.7.4 Source level for braking noise at higher speed . 23
6.8 Aerodynamic noise . 23
7 Sampling requirements . 23
7.1 Practical validity . 23
7.2 Site requirements and selection . 24
7.3 Train selection . 24
7.4 Train speeds . 25
7.5 Numbers of pass-bys . 25
7.6 Frequency range . 25
8 Processing . 25
9 Uncertainties . 32
10 Reporting . 32
Annex A (informative) Methods to determine combined effective roughness . 34
A.1 General . 34
A.2 Direct method requiring track and vehicle possession . 34
A.3 Indirect method using rail vibration – trackside method . 34
A.4 Survey methods . 34
Annex B (informative) Calculation of sound power from sound pressure . 36
B.1 Definition . 36
B.2 Calculation method . 36
B.3 Tabulated transfer functions for CNOSSOS for given track geometries and source-
receiver combinations . 37
Annex C (informative) Separation methods for rolling noise of vehicle and track . 62
C.1 Principle of separation . 62
C.2 Separation based on calculation . 62
C.3 Separation based on measurement . 63
C.4 Separation based on external reference . 63
Annex D (informative) Specific environments . 64
Annex E (informative) Transposition between train and track types . 65
Bibliography . 66
European foreword
This document (EN 17936:2024) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, 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 April 2025, and conflicting national standards shall be
withdrawn at the latest by April 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
In Europe, various prediction methods for environmental noise exist. For noise mapping and planning of
railway lines, the prediction methods are enshrined in national or European legislation such as Directive
(EU) 2015/996 (CNOSSOS). An integral a
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