Cycles — Audible warning devices — Technical specification and test methods

ISO 14878:2015 lays down the technical specifications, such as the sound pressure level and the durability, and specifies the corresponding test method for audible warning devices (AWD) which may be fitted to cycles. ISO 14878:2015 applies to all types of audible warning devices (AWD) for use on bicycles.

Cycles — Dispositifs avertisseurs sonores — Spécifications techniques et méthodes d'essai

General Information

Status
Published
Publication Date
30-Nov-2015
Current Stage
9093 - International Standard confirmed
Start Date
14-Apr-2021
Completion Date
14-Apr-2021
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ISO 14878:2015 - Cycles -- Audible warning devices -- Technical specification and test methods
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INTERNATIONAL ISO
STANDARD 14878
First edition
2015-12-15
Cycles — Audible warning devices
— Technical specification and test
methods
Cycles — Dispositifs avertisseurs sonores — Spécifications techniques
et méthodes d’essai
Reference number
ISO 14878:2015(E)
ISO 2015
---------------------- Page: 1 ----------------------
ISO 14878:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 14878:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols and abbreviated terms ........................................................................................................................................................... 2

5 Instrumentations ................................................................................................................................................................................................. 2

5.1 Instruments for acoustical measurement........................................................................................................................ 2

5.1.1 General...................................................................................................................................................................................... 2

5.1.2 Calibration ............................................................................................................................................................................. 2

5.1.3 Compliance with requirements ........................................................................................................................... 2

5.1.4 Meteorological Instrumentation ........................................................................................................................ 2

6 Acoustical environment, meteorological conditions, and background noise .......................................3

6.1 Test site .......................................................................................................................................................................................................... 3

6.2 Meteorological conditions ............................................................................................................................................................. 3

6.3 Background noise ................................................................................................................................................................................. 3

6.4 Mounting of the AWD ........................................................................................................................................................................ 4

6.5 Microphone and AWD positions .............................................................................................................................................. 4

7 Measurement of the sound pressure level ................................................................................................................................. 4

7.1 Actuation of the AWD ........................................................................................................................................................................ 4

7.2 Measurement readings and reported values ................................................................................................................ 4

7.2.1 General...................................................................................................................................................................................... 4

7.2.2 Data compilation .............................................................................................................................................................. 4

7.3 Required sound pressure ............................................................................................................................................................... 5

7.4 Low battery indicator........................................................................................................................................................................ 5

8 Test of durability .................................................................................................................................................................................................. 5

8.1 Test procedure ......................................................................................................................................................................................... 5

8.1.1 Stability mechanical test ........................................................................................................................................... 5

8.1.2 Corrosion test ..................................................................................................................................................................... 6

8.2 Test result .................................................................................................................................................................................................... 6

9 Test report ................................................................................................................................................................................................................... 6

10 Marking .......................................................................................................................................................................................................................... 6

© ISO 2015 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 14878:2015(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 on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 149, Cycles, Subcommittee SC 1, Cycles and

major sub-assemblies.
iv © ISO 2015 – All rights reserved
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INTERNATIONAL STANDARD ISO 14878:2015(E)
Cycles — Audible warning devices — Technical
specification and test methods
1 Scope

This International Standard lays down the technical specifications, such as the sound pressure level

and the durability, and specifies the corresponding test method for audible warning devices (AWD)

which may be fitted to cycles.

This International Standard applies to all types of audible warning devices (AWD) for use on bicycles.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO 9227, Corrosion test in artificial atmosphere — Salt spray tests

ISO 26101, Acoustics — Test methods for the qualification of free-field environments

IEC 60942, Electroacoustics — Sound calibrators
IEC 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications
IEC 61672-3, Electroacoustics — Sound level meters — Part 3: Periodic tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
cycle

any vehicle that has at least two wheels and is propelled solely or mainly by the muscular energy of the

person on that vehicle, in particular by means of pedals
3.2
bicycle
two-wheeled cycle
3.3
audible warning device
AWD
device designed for the purpose to warn people by an audible signal

Note 1 to entry: Including all types of technologies (i.e. bells, horns, electronic audible warning device).

3.4
audible warning device class I
AWD designed for general purpose
3.5
audible warning device class II

AWD designed for purpose of use in area primarily shared by pedestrians and cyclists, such as a

pedestrian zone
© ISO 2015 – All rights reserved 1
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ISO 14878:2015(E)
4 Symbols and abbreviated terms
AWD Audible warning device
5 Instrumentations
5.1 Instruments for acoustical measurement
5.1.1 General

The apparatus used for measuring the sound pressure level shall be a sound level meter or equivalent

measurement system meeting the requirements of class 1 instruments (inclusive of the recommended

windscreen, if used). These requirements are described in IEC 61672-1.

The entire measurement system shall be checked by means of a sound calibrator that fulfils the

requirements of class 1 sound calibrators according to IEC 60942.
Measurements shall be carried out using the time w
...

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