Railway applications - Acoustics - Noise measurement inside railbound vehicles (ISO 3381:2021)

2020-12-22: Decision 31/2020 taken by CEN/TC 256 on 2020-12-18: Extension of dow; dow=dav + 36 months

Bahnanwendungen - Akustik - Geräuschmessungen in spurgebundenen Fahrzeugen (ISO 3381:2021)

Dieses Dokument legt das Messverfahren und die Bedingungen fest, die einzuhalten sind, um an Bord aller Arten von Schienenfahrzeugen oder anderen spurgebundenen Fahrzeugen, nachfolgend „Einheiten“ genannt, mit Ausnahme von Fahrzeugen zur Wartung des Fahrweges, reproduzierbare Geräuschpegel zu erhalten.
Dieses Dokument ist für Typprüfungen anwendbar. Es enthält nicht alle Anweisungen zur Ausführung von Überwachungsprüfungen oder zur Bewertung der Geräuschbelastung von Fahrgästen oder Fahrern über eine ganze Fahrtstrecke.
Dieses Dokument ist nicht auf spurgeführte Busse anwendbar.
Es enthält Messverfahren zur Messung des Geräusches im Fahrzeuginneren (im Allgemeinen wird eine Typprüfung des Fahrzeugs mit nur einer ausgewählten Teilmenge dieser Prüfungen durchgeführt):
- wenn sich das Fahrzeug mit konstanter Geschwindigkeit bewegt;
- wenn das Fahrzeug stillsteht;
- wenn das Fahrzeug beschleunigt oder abbremst;
- im Fahrerhaus, wenn ein externes Warnhorn ertönt (speziell für die Anwendung der EU-Verordnung erforderlich).
Es enthält keine Messverfahren für
- die Hörbarkeit oder Verständlichkeit akustischer Signale, und
- die Beurteilung von Warneinrichtungen, die nicht zu den Warnhörnern gehören.
Die Beurteilung der Geräuscheinwirkung auf das Zugpersonal aufgrund der Betriebsbedingungen ist nicht Gegenstand des vorliegenden Dokuments.
Die Ergebnisse können z. B. genutzt werden
- um die Geräusche im Inneren dieser Einheiten zu beschreiben,
- um die Geräusche im Inneren verschiedener Einheiten auf einem bestimmten Gleisabschnitt zu vergleichen, und
- um grundlegende Quelldaten für Einheiten zu erfassen.
Die in diesem Dokument festgelegten Prüfverfahren sind Verfahren der Genauigkeitsklasse 2, der bevorzugten Genauigkeitsklasse für die Zwecke der Geräuschangabe, wie in ISO 12001 festgelegt. Falls Prüfbedingungen gelockert werden, wie z. B. bei der Überwachung von Zügen während des Betriebs, entsprechen die Ergebnisse nicht mehr der Genauigkeitsklasse 2.
Die für Prüfungen bei Beschleunigungs- und Bremsvorgängen festgelegten Verfahren sind Verfahren der Genauigkeitsklasse 3.

Applications ferroviaires - Acoustique - Mesurage du bruit à l'intérieur des véhicules circulant sur rails (ISO 3381:2021)

Le présent document spécifie la méthode de mesurage et les conditions nécessaires pour obtenir des niveaux de bruit reproductibles à bord de tous les types de véhicules circulant sur rails ou sur d'autres types de voies fixes, ci-après désignés « unité », à l'exception des véhicules de maintenance des voies fonctionnant en modes travail.
Le présent document s'applique aux essais de type. Il ne fournit pas toutes les instructions nécessaires pour effectuer les essais de surveillance ou l'évaluation de l'exposition des passagers ou des conducteurs au bruit pendant tout le trajet.
Le présent document ne s'applique pas aux autobus guidés.
Il fournit les procédures de mesurage permettant d'évaluer le bruit à l'intérieur du véhicule (en général, un essai de type du véhicule est réalisé à l'aide d'un sous-ensemble sélectionné de ces essais uniquement) :
- lorsque le véhicule circule à vitesse constante ;
- lorsque le véhicule est à l'arrêt ;
- lorsque le véhicule est en phase d'accélération ou de décélération ;
- dans la cabine de conduite lorsqu'un avertisseur sonore extérieur retentit (nécessaire en particulier pour l'application de la réglementation de l'Union européenne).
Le présent document ne fournit pas les procédures de mesurage pour évaluer :
- l'audibilité ou l'intelligibilité des signaux sonores ;
- l'évaluation des dispositifs avertisseurs autres que les avertisseurs sonores.
L'évaluation de l'exposition du personnel de bord au bruit induit par les conditions d'exploitation ne relève pas du domaine d'application du présent document.
Les résultats peuvent être utilisés, par exemple, pour :
- caractériser le bruit émis à l'intérieur de ces unités ;
- comparer les émissions de bruit intérieur de différentes unités sur une section de voie particulière ;
- recueillir des données de base concernant les sources de bruit affectant les unités.
Les procédures d'essai spécifiées dans le présent document sont de la classe d'expertise (classe 2), qui est la classe préférentielle pour la déclaration du bruit, conformément à l'ISO 12001. Si les conditions d'essai sont assouplies (comme cela est le cas, par exemple, pour la surveillance des trains en service), alors les résultats ne relèvent plus de la classe d'expertise.
Les procédures spécifiées pour les essais d'accélération et de décélération font partie de la classe de contrôle (classe 3).

Železniške naprave - Akustika - Merjenje hrupa v tirnih vozilih (ISO 3381:2021)

General Information

Status
Published
Public Enquiry End Date
24-Dec-2019
Publication Date
10-Oct-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
30-Sep-2021
Due Date
05-Dec-2021
Completion Date
11-Oct-2021

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SLOVENSKI STANDARD
SIST EN ISO 3381:2021
01-november-2021
Nadomešča:
SIST EN 15892:2011
SIST EN ISO 3381:2011
Železniške naprave - Akustika - Merjenje hrupa v tirnih vozilih (ISO 3381:2021)

Railway applications - Acoustics - Noise measurement inside railbound vehicles (ISO

3381:2021)
Bahnanwendungen - Akustik - Geräuschmessungen in spurgebundenen Fahrzeugen
(ISO 3381:2021)

Applications ferroviaires - Acoustique - Mesurage du bruit à l'intérieur des véhicules

circulant sur rails (ISO 3381:2021)
Ta slovenski standard je istoveten z: EN ISO 3381:2021
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN ISO 3381:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 3381:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 3381:2021
EN ISO 3381
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2021
EUROPÄISCHE NORM
ICS 17.140.30; 45.020 Supersedes EN 15892:2011, EN ISO 3381:2011
English Version
Railway applications - Acoustics - Noise measurement
inside railbound vehicles (ISO 3381:2021)

Applications ferroviaires - Acoustique - Mesurage du Bahnanwendungen - Akustik - Geräuschmessungen in

bruit à l'intérieur des véhicules ferroviaires circulant spurgebundenen Fahrzeugen (ISO 3381:2021)

sur rails (ISO 3381:2021)
This European Standard was approved by CEN on 10 September 2021.

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, Turkey 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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3381:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 3381:2021
EN ISO 3381:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 3381:2021
EN ISO 3381:2021 (E)
European foreword

This document (EN ISO 3381:2021) has been prepared by Technical Committee ISO/TC 43 "Acoustics"

in collaboration with 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 March 2022, and conflicting national standards shall

be withdrawn at the latest by September 2024.

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.

This document supersedes EN 15892:2011 and EN ISO 3381:2011.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association.

Any feedback and questions on this document should be directed to the users’ national standards

body/national committee. A complete listing of these bodies can be found on the CEN websites.

According to the CEN-CENELEC Internal Regulations, the national standards organizations 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, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 3381:2021 has been approved by CEN as EN ISO 3381:2021 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 3381:2021
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SIST EN ISO 3381:2021
INTERNATIONAL ISO
STANDARD 3381
Third edition
2021-09
Railway applications — Acoustics —
Noise measurement inside railbound
vehicles
Applications ferroviaires — Acoustique — Mesurage du bruit à
l'intérieur des véhicules circulant sur rails
Reference number
ISO 3381:2021(E)
ISO 2021
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SIST EN ISO 3381:2021
ISO 3381:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 3381:2021
ISO 3381:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Instrumentation and calibration ......................................................................................................................................................... 3

4.1 Instrumentation ..................................................................................................................................................................................... 3

4.2 Calibration .................................................................................................................................................................................................. 3

5 Measurement positions ................................................................................................................................................................................. 4

5.1 Division of the unit into areas .................................................................................................................................................... 4

5.1.1 General...................................................................................................................................................................................... 4

5.1.2 Definition of area types .............................................................................................................................................. 4

5.1.3 Definition of area acoustics .................................................................................................................................... 4

5.1.4 Selection of areas to be assessed ....................................................................................................................... 4

5.2 Measurement positions ................................................................................................................................................................... 6

5.3 Measurement height .......................................................................................................................................................................... 7

5.3.1 Seating position ................................................................................................................................................................ 7

5.3.2 Standing position ...................................................................... ....................................................................................... 7

5.3.3 Lying position ..................................................................................................................................................................... 7

5.3.4 Driving position ................................................................................................................................................................ 8

6 Stationary test ......................................................................................................................................................................................................... 9

6.1 General ........................................................................................................................................................................................................... 9

6.2 Environmental conditions ............................................................................................................................................................. 9

6.2.1 Acoustical environment ............................................................................................................................................. 9

6.2.2 Meteorological conditions ....................................................................................................................................... 9

6.2.3 Background sound pressure level ..................................................................................................................10

6.3 Track conditions .................................................................................................................................................................................10

6.4 Vehicle conditions .............................................................................................................................................................................10

6.4.1 General...................................................................................................................................................................................10

6.4.2 Normal operating conditions .............................................................................................................................10

6.4.3 Additional operating conditions......................................................................................................................11

6.5 Measured quantities ........................................................................................................................................................................11

6.6 Test procedure ......................................................................................................................................................................................11

6.7 Data processing ...................................................................................................................................................................................11

6.7.1 Standard processing ..................................................................................................................................................11

6.7.2 Additional processing ...............................................................................................................................................12

7 Testing in cabs when sounding an external warning horn ....................................................................................12

7.1 Environmental conditions ..........................................................................................................................................................12

7.1.1 Acoustical environment ..........................................................................................................................................12

7.1.2 Meteorological conditions ....................................................................................................................................13

7.1.3 Background sound pressure level ..................................................................................................................13

7.2 Track conditions .................................................................................................................................................................................13

7.3 Vehicle conditions .............................................................................................................................................................................13

7.4 Measured quantities ........................................................................................................................................................................13

7.5 Test procedure ......................................................................................................................................................................................13

7.6 Data processing ...................................................................................................................................................................................14

7.6.1 Standard processing ..................................................................................................................................................14

7.6.2 Additional processing ...............................................................................................................................................14

8 Constant speed test .........................................................................................................................................................................................14

8.1 General ........................................................................................................................................................................................................14

8.2 Environmental conditions ..........................................................................................................................................................14

8.2.1 Acoustical environment ..........................................................................................................................................14

8.2.2 Meteorological conditions ....................................................................................................................................15

© ISO 2021 – All rights reserved iii
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SIST EN ISO 3381:2021
ISO 3381:2021(E)

8.2.3 Background sound pressure level ..................................................................................................................15

8.3 Track conditions .................................................................................................................................................................................15

8.3.1 General...................................................................................................................................................................................15

8.3.2 Track design ......................................................................................................................................................................15

8.3.3 Track superstructure ................................................................................................................................................16

8.3.4 Track quality .....................................................................................................................................................................16

8.3.5 Rail roughness and track dynamic properties ....................................................................................16

8.3.6 Special conditions ........................................................................................................................................................16

8.4 Vehicle conditions .............................................................................................................................................................................16

8.4.1 General...................................................................................................................................................................................16

8.4.2 Normal operating conditions .............................................................................................................................17

8.4.3 Occupancy and load ...................................................................................................................................................17

8.4.4 Wheel tread conditioning ......................................................................................................................................17

8.4.5 Additional conditions ...............................................................................................................................................18

8.5 Measured quantities ........................................................................................................................................................................18

8.6 Test procedure ......................................................................................................................................................................................18

8.6.1 General...................................................................................................................................................................................18

8.6.2 Test speeds .........................................................................................................................................................................18

8.6.3 Measurement time intervals ...............................................................................................................................18

8.7 Data processing ...................................................................................................................................................................................19

8.7.1 Standard processing ..................................................................................................................................................19

8.7.2 Additional processing ...............................................................................................................................................19

9 Acceleration from stand-still test and deceleration to stand-still test ......................................................20

9.1 General ........................................................................................................................................................................................................20

9.2 Environmental conditions ..........................................................................................................................................................20

9.2.1 Acoustical environment ..........................................................................................................................................20

9.2.2 Meteorological conditions ....................................................................................................................................20

9.2.3 Background sound pressure level ..................................................................................................................21

9.3 Track conditions .................................................................................................................................................................................21

9.4 Vehicle conditions .............................................................................................................................................................................21

9.4.1 General...................................................................................................................................................................................21

9.4.2 Normal operating conditions .............................................................................................................................22

9.4.3 Occupancy and load ...................................................................................................................................................22

9.4.4 Wheel tread conditions ...........................................................................................................................................22

9.5 Test procedure for the acceleration test ........................................................................................................................23

9.6 Test procedure for the deceleration test ........................................................................................................................23

9.7 Maximum level method ................................................................................................................................................................23

9.7.1 Measured quantities ..................................................................................................................................................23

9.7.2 Data processing ..............................................................................................................................................................23

9.8 Averaged level method ..................................................................................................................................................................24

9.8.1 Measured quantity ......................................................................................................................................................24

9.8.2 Data processing ..............................................................................................................................................................24

10 Quality of the measurements ...............................................................................................................................................................25

10.1 Deviations from the requirements ......................................................................................................................................25

10.2 Positional tolerances .......................................................................................................................................................................25

10.3 Measurement spread ......................................................................................................................................................................25

10.4 Measurement uncertainties ......................................................................................................................................................25

11 Test report ................................................................................................................................................................................................................25

Annex A (informative) Guidance on the definition and reporting of vehicle conditions ............................27

Annex B (informative) Method to characterize the impulsive character of the noise ....................................28

Annex C (normative) Acoustic track characteristics .........................................................................................................................30

Annex D (informative) Specific environments ........................................................................................................................................34

Annex E (informative) Quantification of measurement uncertainties according to

ISO/IEC Guide 98-3 ..........................................................................................................................................................................................37

iv © ISO 2021 – All rights reserved
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SIST EN ISO 3381:2021
ISO 3381:2021(E)

Bibliography .............................................................................................................................................................................................................................41

© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 3381:2021
ISO 3381:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO 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.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by the European Committee for Standardization (CEN) Technical

Committee CEN/TC 256, Railway applications, in collaboration with ISO Technical Committee

ISO/TC 43, Acoustics, Subcommittee SC 1, Noise, in accordance with the Agreement on technical

cooperation between ISO and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 3381:2005), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— new structure of the document to align it with the structure of ISO 3095;
— an improved selection process of the measurement positions – see Clause 5;
— new measurement procedures for noise in driver's cab – see Clause 7;

— improved specifications of the vehicle conditions for the different types of tests - see 6.4, 7.3, 8.4 and

9.4;
— an improved assessment of the tonality - see 6.7, 8.7 and 9.8.2.

— an improved indirect assessment of the track acoustic characteristics – see 8.3.4, 9.3 and Annex C;

— precisions for measurement in specific environments (tunnels, …) – see Annex D;

— an assessment of measurement uncertainties – see Annex E.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
vi © ISO 2021 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 3381:2021
INTERNATIONAL STANDARD ISO 3381:2021(E)
Railway applications — Acoustics — Noise measureme
...

SLOVENSKI STANDARD
oSIST prEN ISO 3381:2019
01-december-2019

Železniške naprave - Akustika - Merjenje hrupa v tirnih vozilih (ISO/DIS 3381:2019)

Railway applications - Acoustics - Noise measurement inside railbound vehicles
(ISO/DIS 3381:2019)
Bahnanwendungen - Akustik - Geräuschmessungen in spurgebundenen Fahrzeugen
(ISO/DIS 3381:2019)

Applications ferroviaires - Acoustique - Mesurage du bruit à l'intérieur des véhicules

circulant sur rails (ISO/DIS 3381:2019)
Ta slovenski standard je istoveten z: prEN ISO 3381
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
oSIST prEN ISO 3381:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 3381:2019
---------------------- Page: 2 ----------------------
oSIST prEN ISO 3381:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 3381
ISO/TC 43/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2019-10-02 2019-12-25
Railway applications — Acoustics — Noise measurement
inside railbound vehicles

Applications ferroviaires — Acoustique — Mesurage du bruit à l'intérieur des véhicules circulant sur rails

ICS: 45.020; 17.140.30
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 3381:2019(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2019
---------------------- Page: 3 ----------------------
oSIST prEN ISO 3381:2019
ISO/DIS 3381:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 3381:2019
ISO/DIS 3381:2019(E)
Contents Page

European foreword .............................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 2

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Instrumentation and calibration ......................................................................................................................................................... 4

4.1 Instrumentation ..................................................................................................................................................................................... 4

4.2 Calibration .................................................................................................................................................................................................. 4

5 Measurement positions ................................................................................................................................................................................. 4

5.1 Definition of areas ................................................................................................................................................................................ 4

5.1.1 Definition of area types .............................................................................................................................................. 4

5.1.2 Division of the unit into areas............................................................................................................................... 4

5.1.3 Selection of areas to be assessed ....................................................................................................................... 5

5.2 Measurement positions ................................................................................................................................................................... 6

5.3 Measurement height .......................................................................................................................................................................... 6

5.3.1 Seating position ................................................................................................................................................................ 6

5.3.2 Standing position ...................................................................... ....................................................................................... 7

5.3.3 Lying position ..................................................................................................................................................................... 7

5.3.4 Driving position ................................................................................................................................................................ 7

6 Stationary test ......................................................................................................................................................................................................... 8

6.1 General ........................................................................................................................................................................................................... 8

6.2 Environmental conditions ............................................................................................................................................................. 9

6.2.1 Acoustical environment ............................................................................................................................................. 9

6.2.2 Meteorological conditions ....................................................................................................................................... 9

6.2.3 Background sound pressure level ..................................................................................................................... 9

6.2.4 Track conditions ............................................................................................................................................................... 9

6.3 Vehicle conditions ................................................................................................................................................................................ 9

6.3.1 General...................................................................................................................................................................................... 9

6.3.2 Normal operating conditions .............................................................................................................................10

6.3.3 Additional operating conditions......................................................................................................................10

6.4 Measured quantities ........................................................................................................................................................................10

6.5 Test procedure ......................................................................................................................................................................................10

6.6 Data processing ...................................................................................................................................................................................11

6.6.1 Standard processing ..................................................................................................................................................11

6.6.2 Additional processing ...............................................................................................................................................11

7 Testing in cabs when sounding an external warning horn ....................................................................................12

7.1 Environmental conditions ..........................................................................................................................................................12

7.1.1 Acoustical environment ..........................................................................................................................................12

7.1.2 Meteorological conditions ....................................................................................................................................12

7.1.3 Background sound pressure level ..................................................................................................................12

7.2 Track conditions .................................................................................................................................................................................12

7.3 Vehicle conditions .............................................................................................................................................................................12

7.4 Measured quantities ........................................................................................................................................................................12

7.5 Test procedure ......................................................................................................................................................................................12

7.6 Data processing ...................................................................................................................................................................................13

7.6.1 Standard processing ..................................................................................................................................................13

7.6.2 Additional processing ...............................................................................................................................................13

8 Constant Speed Test .......................................................................................................................................................................................13

8.1 General ........................................................................................................................................................................................................13

8.2 Environmental Conditions .........................................................................................................................................................13

8.2.1 Acoustical Environment .........................................................................................................................................13

8.2.2 Meteorological Conditions ...................................................................................................................................14

8.2.3 Background Sound Pressure Level ................................................................................................................14

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8.3 Track Conditions.................................................................................................................................................................................14

8.3.1 General...................................................................................................................................................................................14

8.3.2 Track design of the Line ..........................................................................................................................................14

8.3.3 Track Superstructure ................................................................................................................................................15

8.3.4 Track Quality ....................................................................................................................................................................15

8.3.5 Rail Roughness & Track dynamic properties .......................................................................................15

8.3.6 Special conditions ........................................................................................................................................................15

8.4 Vehicle Conditions .............................................................................................................................................................................15

8.4.1 General...................................................................................................................................................................................15

8.4.2 Normal operating conditions .............................................................................................................................16

8.4.3 Occupancy and Load ..................................................................................................................................................16

8.4.4 Wheel Tread Conditioning ....................................................................................................................................17

8.4.5 Additional conditions ...............................................................................................................................................17

8.5 Measured Quantities .......................................................................................................................................................................18

8.6 Test Procedure......................................................................................................................................................................................18

8.6.1 General...................................................................................................................................................................................18

8.6.2 Test Speeds ........................................................................................................................................................................18

8.6.3 Measurement Time Intervals .............................................................................................................................18

8.7 Data Processing ...................................................................................................................................................................................18

8.7.1 Standard Processing ..................................................................................................................................................18

8.7.2 Additional processing ...............................................................................................................................................19

9 Acceleration from Stand-still test and deceleration to stand-still test .....................................................20

9.1 General ........................................................................................................................................................................................................20

9.2 Environmental conditions ..........................................................................................................................................................20

9.2.1 Acoustical environment ..........................................................................................................................................20

9.2.2 Meteorological conditions ....................................................................................................................................20

9.2.3 Background sound pressure level ..................................................................................................................20

9.3 Track conditions .................................................................................................................................................................................21

9.4 Vehicle conditions .............................................................................................................................................................................21

9.4.1 General...................................................................................................................................................................................21

9.4.2 Normal operating conditions .............................................................................................................................21

9.4.3 Occupancy and Load ..................................................................................................................................................22

9.4.4 Wheel-tread conditions ..........................................................................................................................................22

9.5 Test procedure for the acceleration test ........................................................................................................................22

9.6 Test procedure for the deceleration test ........................................................................................................................22

9.7 Maximum level method ................................................................................................................................................................23

9.7.1 Measured quantities ..................................................................................................................................................23

9.7.2 Data processing ..............................................................................................................................................................23

9.8 Averaged level method ..................................................................................................................................................................23

9.8.1 Measured quantity ......................................................................................................................................................23

9.8.2 Data processing ..............................................................................................................................................................24

10 Quality of the measurements ...............................................................................................................................................................24

10.1 Deviations from the requirements ......................................................................................................................................24

10.2 Positional tolerances .......................................................................................................................................................................24

10.3 Measurement spread ......................................................................................................................................................................25

10.4 Measurement uncertainties ......................................................................................................................................................25

11 Test Report ...............................................................................................................................................................................................................25

Annex A (informative) Guidance on the definition and reporting of vehicle conditions ............................27

Annex B (informative) Method to characterize the impulsive character of the noise ....................................28

Annex C (normative) Acoustic Track Characteristics .......................................................................................................................29

Annex D (informative) Specific environments ........................................................................................................................................33

Annex E (informative) Quantification of measurement uncertainties according to

ISO/IEC Guide 98-3:2008 ..........................................................................................................................................................................36

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Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of Directive (EU) 2016/797 aimed to be covered ....................................................................41

Bibliography .............................................................................................................................................................................................................................43

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European foreword

This document (prEN ISO 3381:2019) has been prepared by Technical Committee CEN/TC 256 “Railway

applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN ISO 3381:2011.
The main changes with respect to the previous edition are listed below:
— modular structure;

— assessment of the reference track section with reference to EN 15610 (rail roughness) and EN 15461

(track decay rates);

— introduction of an improved indirect assessment of the track acoustic characteristics;

— new Cabnoise specification;
— improved selection process of the measurement positions;

— improved specifications of the vehicle conditions for the different types of tests;

— an improved assessment of the tonality.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 3381:2019(E)
Railway applications — Acoustics — Noise measurement
inside railbound vehicles
1 Scope

This document specifies the measurement method and conditions to obtain reproducible and

comparable noise levels on-board all kinds of vehicles operating on rails or other types of fixed track,

hereinafter conventionally called “unit”, except for track maintenance vehicles in working modes.

NOTE For constant speed tests the concept of “comparability” needs further caution, as this term is used

as well to classify the measurement precision grade related to track roughness and track decay rates given in

this document. Nevertheless, the measurement may be acceptable as type test on a track of controlled acoustic

quality, but not compliant to the track specification given in this document.

This document is applicable to type testing. It does not include all the instructions to carry out

monitoring testing or evaluation of noise exposure of passengers or drivers over a whole journey.

This document is not applicable to guided buses.
It provides measurement procedures for vehicle interior noise:
— when the vehicle is moving at constant speed;
— when the vehicle is stationary;
— when the vehicle is accelerating or decelerating;
— in the driver's cab when an external warning horn is sounding.

NOTE In general, a vehicle type acceptance test would require only a selected subset of these tests to be

performed.
It does not provide measurement procedures for:
— audibility or intelligibility of any audible signals;
— assessment of warning devices other than warning horns.

The assessment of noise exposure of train crew due to operational conditions is not in the scope of this

document.
The results may be used, for example:
— to characterise the noise inside these units;
— to compare the internal noise of various units on a particular track section;
— to collect basic source data for units.

The test procedures specified in this document are of engineering grade (grade 2), that is the preferred

one for noise declaration purposes, as defined in EN ISO 12001. If test conditions are relaxed for

example as done for monitoring of in-service trains, then the results are no longer of engineering grade.

The procedures specified for accelerating and decelerating tests are of survey grade.

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2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references the latest edition of the referenced

document (including any amendments) applies.

DIN 45681:2005, Acoustics — Determination of tonal components of noise and determination of a tone

adjustment for the assessment of noise immissions

EN 15461, Railway applications — Noise emission — Characterization of the dynamic properties of track

sections for pass by noise measurements

EN 15610:2019, Railway applications — Noise emission — Rail roughness measurement related to rolling

noise generation

EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories

ISO 12001, Acoustics — Noise emitted by machinery and equipment — Rules for the drafting and

presentation of a noise test code

ISO 1996-1, Acoustics — Description, measurement and assessment of environmental noise — Part 1: Basic

quantities and assessment procedures

ISO 1996-2:2017, Acoustics — Description, measurement and assessment of environmental noise — Part 2:

Determination of sound pressure levels
IEC 60942, Electroacoustics — Sound calibrators
IEC 61260, Electroacoustics — Octave-band and fractional-octave-band filters
IEC 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications

IEC 61672-2, Electroacoustics — Sound level meters — Part 2: Pattern evaluation tests

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at http: //www .iso .org/obp
3.1
unit

generic term used to name the rolling stock which is subject to the application of this document

Note 1 to entry: A unit may be composed of several motored or unmotored vehicles, or cars.

3.2
type test for noise emission of railbound units

measurement performed to prove that, or to check if, a unit delivered by the manufacturer complies

with the noise specifications
3.3
acoustic roughness
r(x)

variation of the height of the rail running surface associated with rolling noise excitation, expressed as

a function of distance x along the rail
[SOURCE: EN 15610]
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3.4
acoustic roughness spectrum
amplitude of the acoustic roughness expressed as a function of the wavelength λ
3.5
track decay rate

rate of attenuation of vibration amplitude of either vertical or lateral bending wave motion in the rail as

a function of the distance along the rail

Note 1 to entry: It is represented by a one-third octave spectrum of values expressed in decibels per metre

(dB/m) representing attenuation over distance.
[SOURCE: EN 15461]
3.6
Acoustic Track Characteristics (ATC)

characteristics of the track that are defined in terms of acoustic rail roughness and track decay rates

3.7
test section

specific section of track that is associated with a particular set of measurements

3.8
reference track section

portion of track on which the track decay rates and the acoustic roughness levels are controlled

Note 1 to entry: On this section of track, decay rates and acoust
...

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