EN 60942:2003
(Main)Electroacoustics - Sound calibrators
Electroacoustics - Sound calibrators
Specifies the performance requirements for three classes of sound calibrator: laboratory standard (class LS), class 1 and class 2. Tolerance limits are smallest for class LS and greatest for class 2 instruments. Class LS sound calibrators are normally used only in the laboratory; class 1 and class 2 are considered as sound calibrators for field use. A class 1 sound calibrator is primarily intended for use with a class 1 sound level meter and a class 2 sound calibrator primarily with a class 2 sound level meter, as specified in EN 61672-1. The tolerance limits for class LS sound calibrators are based on the use of a laboratory standard microphone, as specified in EN 61094-1, for demonstrations of conformance to the requirements of this standard. The tolerance limits for class 1 and class 2 sound calibrators are based on the use of a working standard microphone, as specified in EN 61094-4, for demonstrations of conformance to the requirements of this standard. This third edition cancels and replaces the second edition published in 1997, and its amendment 1 (2000), of which it constitutes a technical revision.
Elektroakustik - Schallkalibratoren
Electroacoustique - Calibreurs acoustiques
Spécifie des prescriptions concernant les caractéristiques de trois classes de calibreurs acoustiques: la classe LS pour les étalons de laboratoire, la classe 1 et la classe 2. Les limites de tolérance les plus petites concernent la classe LS et les plus grandes concernent les appareils de classe 2. Les calibreurs acoustiques de classe LS ne sont normalement utilisés qu'en laboratoire; les appareils de classe 1 et de classe 2 sont considérés comme des calibreurs acoustiques utilisés sur le terrain. Un calibreur de classe 1 est prévu pour être utilisé principalement avec un sonomètre de classe 1 et un calibreur de classe 2 est prévu pour être utilisé principalement avec un sonomètre de classe 2, tel qu'il est spécifié dans la EN 61672-1. Les limites de tolérance concernant les calibreurs de classe LS pour montrer la conformité aux prescriptions de la présente norme sont basées sur l'utilisation d'un microphone étalon de laboratoire tel qu'il est spécifié dans la EN 61094-1. Les limites de tolérance concernant les calibreurs acoustiques de classe 1 et 2 pour montrer la conformité aux prescriptions de la présente norme sont basées sur l'utilisation d'un microphone étalon de travail tel qu'il est spécifié dans la EN 61094-4. Cette troisième édition annule et remplace la deuxième édition parue en 1997 et son amendement 1 (2000), dont elle constitue une révision technique.
Electroacoustics - Sound calibrators (IEC 60942:2003)
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Standards Content (Sample)
SLOVENSKI SIST EN 60942:2004
STANDARD
julij 2004
Electroacoustics - Sound calibrators (IEC 60942:2003)
ICS 17.140.50 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 60942
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2003
ICS 17.140.50 Supersedes EN 60942:1998 + A1:2001
English version
Electroacoustics –
Sound calibrators
(IEC 60942:2003)
Electroacoustique – Elektroakustik –
Calibreurs acoustiques Schallkalibratoren
(CEI 60942:2003) (IEC 60942:2003)
This European Standard was approved by CENELEC on 2003-04-01. CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60942:2003 E
Foreword
The text of document 29/528/FDIS, future edition 3 of IEC 60942, prepared by IEC TC 29,
Electroacoustics, in cooperation with the International Organization of Legal Metrology (OIML), was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60942 on
2003-04-01.
This European Standard supersedes EN 60942:1998 + A1:2001.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-04-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A, B, C and ZA are normative.
Annex ZA has been added by CENELEC.
The most significant changes from the previous edition are: the inclusion of maximum permitted
uncertainties of measurement within the tolerance limits; the inclusion of a normative annex giving the
format for reporting results of pattern evaluation tests; changes to the class designations; specification
of the type designation of the microphone to be used to determine the class; harmonization of the
range of operating environmental conditions with those for sound level meters. Specifications for
equivalent free-field and diffuse-field levels have been removed.
__________
Endorsement notice
The text of the International Standard IEC 60942:2003 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard
indicated:
IEC 61000-6-2 NOTE Harmonized as EN 61000-6-2:2001 (modified).
__________
- 3 - EN 60942:2003
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-801 1994 International Electrotechnical - -
Vocabulary (IEV)
Chapter 801: Acoustics and
electroacoustics
IEC 61000-4-2 1995 Electromagnetic compatibility (EMC) EN 61000-4-2 1995
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
IEC 61000-4-3 2002 Part 4-3: Testing and measurement EN 61000-4-3 2002
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-6-1 1997 Part 6-1: Generic standards - Immunity EN 61000-6-1 2001
(mod) for residential, commercial and light-
industrial environments
IEC 61094-1 2000 Measurement microphones EN 61094-1 2000
Part 1: Specifications for laboratory
standard microphones
IEC 61094-2 1992 Part 2: Primary method for pressure EN 61094-2 1993
calibration of laboratory standard
microphones by the reciprocity
technique
IEC 61094-4 1995 Part 4: Specifications for working EN 61094-4 1995
standard microphones
IEC 61094-5 2001 Part 5: Methods for pressure calibration EN 61094-5 2001
of working standard microphones by
comparison
IEC 61672-1 2002 Electroacoustics - Sound level meters EN 61672-1 2003
Part 1: Specifications
CISPR 22 (mod) 1997 Information technology equipment - EN 55022 1998
Radio disturbance characteristics - + corr. July 2001
Limits and methods of measurement
Publication Year Title EN/HD Year
CISPR/IEC 1996 Electromagnetic compatibility (EMC) EN 61000-6-3 2001
61000-6-3 (mod) Part 6-3: Generic standards - Emission
standard for residential, commercial and
light-industrial environments
ISO/IEC Guide 1995 Guide to the expression of uncertainty - -
Expres in measurement
ISO 266 1997 Acoustics - Preferred frequencies - -
ISO Publication 1993 International vocabulary of basic and - -
ISBN 92-67-01075-1
general terms in metrology
OIML R 97 1990 Barometers - -
NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Troisième édition
STANDARD
Third edition
2003-01
Electroacoustique –
Calibreurs acoustiques
Electroacoustics –
Sound calibrators
© IEC 2003 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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For price, see current catalogue
60942 © IEC:2003 – 3 –
CONTENTS
FOREWORD . 5
INTRODUCTION .9
1 Scope .11
2 Normative references.11
3 Terms and definitions.13
4 Reference environmental conditions .17
5 Requirements .17
5.1 General .17
5.2 Sound pressure level .21
5.3 Frequency.23
5.4 Influence of static pressure, air temperature and humidity .25
5.5 Total distortion.29
5.6 Power supply requirements .29
5.7 Specification and calibration of microphones .29
5.8 Electromagnetic compatibility .31
6 Instrument marking and documentation .33
6.1 Marking of the sound calibrator .33
6.2 Individual calibration chart for a class LS sound calibrator .35
6.3 Instruction manual .35
Annex A (normative) Pattern evaluation tests.39
A.0 Introduction .39
A.1 Submission for test.41
A.2 Principal values .41
A.3 Marking of the sound calibrator and supplied documentation.41
A.4 Performance tests at and around reference environmental conditions .41
A.5 Environmental tests.53
A.6 Electromagnetic compatibility .69
Annex B (normative) Periodic tests .77
B.0 Introduction .77
B.1 Submission for test.77
B.2 Preliminary inspection .79
B.3 Performance tests .79
B.4 Calibration of the sound calibrator with other models of microphone.85
B.5 Documentation .85
Annex C (normative) Format for the pattern evaluation report .89
C.0 Introduction .89
C.1 Marking.89
C.2 Submission for test.89
C.3 Pattern evaluation report .91
Bibliography .177
60942 © IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
SOUND CALIBRATORS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
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5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared
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