IEC 61260-2:2016

Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-evaluation tests

IEC 61260-2:2016 provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC 61260-1:2014 for octave-band and fractional-octave-band filters. This first edition of IEC 61260-2 (together with IEC 61260-1:2014 and IEC 61260-3:2016), cancels and replaces the first edition of IEC 61260 published in 1995 and its Amendment 1 published in 2001. This edition constitutes a technical revision.

Electroacoustique - Filtres de bande d'octave et de bande d'une fraction d'octave - Partie 2: Essais d'évaluation d'un modèle

L'IEC 61260-2:2016 décrit les essais nécessaires pour vérifier la conformité à l'ensemble des spécifications obligatoires données dans l'IEC 61260-1:2014 concernant les filtres de bande d'octave et les filtres de bande d'une fraction d'octave. Cette première édition de l'IEC 61260-2 (conjointement avec l'IEC 61260-1:2014 et l'IEC 61260-3:2016) annule et remplace la première édition de l'IEC 61260 parue en 1995 et son Amendement 1 paru en 2001. Cette édition constitue une révision technique.

General Information

• Status: Published
• Publication Date: 22-Mar-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.140.50 - Electroacoustics
• Technical Committee: TC 29 - Electroacoustics
• Drafting Committee: MT 19 - TC 29/MT 19
• Current Stage: PPUB - Publication issued
• Start Date: 31-May-2016
• Completion Date: 23-Mar-2016

Relations

• Replaces: IEC 61260:1995/AMD1:2001 - Amendment 1 - Electroacoustics - Octave-band and fractional-octave-band filters
• Effective Date: 05-Sep-2023
• Amended By: IEC 61260-2:2016/AMD1:2017 - Amendment 1 - Electroacoustics - Octave-band and fractional-octave band filters - Part 2: Pattern evaluation tests
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61260-2 ®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Octave-band and fractional-octave-band filters –
Part 2: Pattern-evaluation tests

Électroacoustique – Filtres de bande d'octave et de bande d'une fraction
d'octave –
Partie 2: Essais d'évaluation d'un modèle

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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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et en français, ainsi que les termes équivalents dans 15
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IEC 61260-2 ®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Octave-band and fractional-octave-band filters –

Part 2: Pattern-evaluation tests

Électroacoustique – Filtres de bande d'octave et de bande d'une fraction

d'octave –
Partie 2: Essais d'évaluation d'un modèle

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8322-3245-3

– 2 – IEC 61260-2:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Submission for testing . 7
5 Marking of the filter and information in the instruction manual . 7
6 Mandatory facilities and general requirements . 8
6.1 General . 8
6.2 Test instruments . 9
7 Tests at reference conditions . 10
7.1 General . 10
7.2 Relative attenuation, effective bandwidth deviation and summation of output
signals . 10
7.2.1 General . 10
7.2.2 Relative attenuation . 11
7.2.3 Effective bandwidth deviation . 11
7.2.4 Summation of output signals . 11
7.3 Linear operating range, measurement range, level range control and
overload indicator . 12
7.4 Time-invariant operation . 13
7.5 Power supply check . 13
8 Electromagnetic and electrostatic compatibility requirements . 14
8.1 General . 14
8.2 Influence of electrostatic discharges . 14
8.3 Influence of AC power-frequency and radio-frequency fields . 14
8.3.1 Input signal . 14
8.3.2 Range setting . 14
8.3.3 AC power-frequency tests . 14
8.3.4 Radio-frequency tests . 15
8.4 Radio-frequency emissions and public power supply disturbances . 16
9 Sensitivity to ambient air temperature and relative humidity . 17
10 Pattern-evaluation report . 17
Annex A (informative) Uncertainty related to test by sinusoidal sweeps . 19
A.1 General . 19
A.2 Digitally generated signal . 19
A.3 Test signal from a signal generator . 20
A.4 Comparing measurements . 21
Annex B (informative) Test of time invariant operation with the use of an exponential
sweep – Example . 22
B.1 General . 22
B.2 Example. 22
Bibliography . 24

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS – OCTAVE-BAND
AND FRACTIONAL-OCTAVE-BAND FILTERS –

Part 2: Pattern-evaluation tests

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Pub
...

IEC 61260-2 ®
Edition 1.1 2017-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electroacoustics – Octave-band and fractional-octave-band filters –
Part 2: Pattern-evaluation tests

Électroacoustique – Filtres de bande d'octave et de bande d'une fraction
d'octave –
Partie 2: Essais d'évaluation d'un modèle

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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
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details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
La recherche avancée permet de trouver des publications IEC
65 000 entrées terminologiques électrotechniques, en anglais
en utilisant différents critères (numéro de référence, texte,
et en français, extraites des articles Termes et Définitions des
comité d’études,…). Elle donne aussi des informations sur les
publications IEC parues depuis 2002. Plus certaines entrées
projets et les publications remplacées ou retirées.
antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Restez informé sur les nouvelles publications IEC. Just Service Clients - webstore.iec.ch/csc
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC 61260-2 ®
Edition 1.1 2017-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electroacoustics – Octave-band and fractional-octave-band filters –

Part 2: Pattern-evaluation tests

Électroacoustique – Filtres de bande d'octave et de bande d'une fraction

d'octave –
Partie 2: Essais d'évaluation d'un modèle

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8322-4229-2

IEC 61260-2 ®
Edition 1.1 2017-04
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electroacoustics – Octave-band and fractional-octave-band filters –
Part 2: Pattern-evaluation tests

Électroacoustique – Filtres de bande d'octave et de bande d'une fraction
d'octave –
Partie 2: Essais d'évaluation d'un modèle

– 2 – IEC 61260-2:2016+AMD1:2017 CSV
© IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Submission for testing . 7
5 Marking of the filter and information in the instruction manual . 7
6 Mandatory facilities and general requirements . 8
6.1 General . 8
6.2 Test instruments . 9
7 Tests at reference conditions . 10
7.1 General . 10
7.2 Relative attenuation, effective bandwidth deviation and summation of output
signals . 10
7.2.1 General . 10
7.2.2 Relative attenuation . 11
7.2.3 Effective bandwidth deviation . 11
7.2.4 Summation of output signals . 11
7.3 Linear operating range, measurement range, level range control and
overload indicator . 12
7.4 Time-invariant operation . 13
7.5 Power supply check . 14
8 Electromagnetic and electrostatic compatibility requirements. 14
8.1 General . 14
8.2 Influence of electrostatic discharges . 14
8.3 Influence of AC power-frequency and radio-frequency fields . 15
8.3.1 Input signal . 15
8.3.2 Range setting . 15
8.3.3 AC power-frequency tests . 15
8.3.4 Radio-frequency tests . 15
8.4 Radio-frequency emissions and public power supply disturbances . 16
9 Sensitivity to ambient air temperature and relative humidity . 17
10 Pattern-evaluation report . 18
Annex A (informative) Uncertainty related to test by sinusoidal sweeps . 19
A.1 General . 19
A.2 Digitally generated signal . 19
A.3 Test signal from a signal generator . 20
A.4 Comparing measurements . 21
Annex B (informative) Test of time invariant operation with the use of an exponential
sweep – Example . 22
B.1 General . 22
B.2 Example. 22
Bibliography . 24

© IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS – OCTAVE-BAND
AND FRACTIONAL-OCTAVE-BAND FILTERS –
Part 2: Pattern-evaluation tests
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity.
...