EN 60268-4:2004
(Main)Sound system equipment - Part 4: Microphones
Sound system equipment - Part 4: Microphones
Specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also gives recommendations as to characteristics to be specified. It applies to sound system microphones for all applications for speech and music
Elektroakustische Geräte - Teil 4: Mikrofone
Equipements pour systèmes électroacoustiques - Partie 4: Microphones
Specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also gives recommendations as to characteristics to be specified. It applies to sound system microphones for all applications for speech and music
Elektroakustične naprave – 4. del: Mikrofoni (IEC 60268-4:2004)*
General Information
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Standards Content (Sample)
SLOVENSKI SIST EN 60268-4:2004
STANDARD
september 2004
Elektroakustične naprave – 4. del: Mikrofoni (IEC 60268-4:2004)*
Sound system equipment - Part 4: Microphones (IEC 60268-4:2004)
ICS 33.160.50 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 60268-4
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2004
ICS 33.160.50 Supersedes EN 60268-4:1999
English version
Sound system equipment
Part 4: Microphones
(IEC 60268-4:2004)
Equipements pour systèmes Elektroakustische Geräte
électroacoustiques Teil 4: Mikrofone
Partie 4: Microphones (IEC 60268-4:2004)
(CEI 60268-4:2004)
This European Standard was approved by CENELEC on 2004-03-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, 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
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60268-4:2004 E
Foreword
The text of document 100/721/FDIS, future edition 3 of IEC 60268-4, prepared by IEC TC 100, Audio,
video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and
was approved by CENELEC as EN 60268-4 on 2004-03-01.
This European Standard supersedes EN 60268-4:1999
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) 2004-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60268-4:2004 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60574-1 NOTE Harmonized as HD 369.1 S1:1978 (not modified)
IEC 61672-1 NOTE Harmonized as EN 61672-1:2003 (not modified)
__________
- 3 - EN 60268-4:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
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 60065 (mod) 2001 Audio, video and similar electronic EN 60065 2002
apparatus - Safety requirements
1)
IEC 60268-1 1985 Sound system equipment HD 483.1 S2 1989
Part 1: General
2)
IEC 60268-2 1987 Part 2: Explanation of general terms and HD 483.2 S2 1993
calculation methods
IEC 60268-3 2000 Part 3: Amplifiers EN 60268-3 2000
+ corr. January 2002
IEC 60268-5 2003 Part 5: Loudspeakers EN 60268-5 2003
3)
IEC 60268-11 1987 Part 11: Application of connectors for HD 483.11 S3 1993
the interconnection of sound system
components
4)
IEC 60268-12 1987 Part 12: Application of connectors for EN 60268-12 1995
broadcast and similar use
IEC 60574-3 1983 Audiovisual, video and television HD 369.3 S1 1986
equipment and systems
Part 3: Connectors for the
interconnection of equipment in audio-
visual systems
IEC 60914 1988 Conference systems - Electrical and HD 549 S1 1989
audio requirements
IEC 61000-4-2 1995 Electromagnetic compatibility (EMC) EN 61000-4-2 1995
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
1)
HD 483.1 S2 includes A1:1988 to IEC 60268-1.
2)
HD 483.2 S2 includes A1:1991 to IEC 60268-2.
3)
HD 483.11 S3 includes A1:1989 + A2:1991 to IEC 60268-11.
4)
EN 60268-12 includes A1:1991 to IEC 60268-12.
Publication Year Title EN/HD Year
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 61265 1995 Electroacoustics - Instruments for EN 61265 1995
measurement of aircraft noise -
Performance requirements for systems
to measure one-third-octave band
sound pressure levels in noise
certification of transport-category
aeroplanes
IEC 61938 1996 Audio, video and audiovisual systems - EN 61938 1997
Interconnections and matching values - + corr. February 1997
Preferred matching values of analogue
signals
ISO 354 2003 Acoustics - Measurement of sound EN ISO 354 2003
absorption in a reverberation room
INTERNATIONAL IEC
STANDARD
60268-4
Third edition
2004-02
Sound system equipment –
Part 4:
Microphones
IEC 2004 Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
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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МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
– 2 – 60268-4 IEC:2004(E)
CONTENTS
FOREWORD.5
1 Scope.7
2 Normative references.7
3 General conditions.8
3.1 General .8
3.2 Measurement conditions .8
4 Particular conditions .9
4.1 Pre-conditioning .9
4.2 Sound source .10
4.3 Measurement of sound pressure.10
4.4 Voltage measuring system .10
4.5 Acoustical environment.10
4.6 Methods of measuring frequency response .13
4.7 Overall accuracy.14
4.8 Graphical presentation of results.14
5 Type description (acoustical behaviour).14
5.1 Principle of the transducer .14
5.2 Type of microphone .14
5.3 Type of directional response characteristics.14
6 Terminals and controls.15
6.1 Marking .15
6.2 Connectors and electrical interface values .15
7 Reference point and axis .15
7.1 Reference point .15
7.2 Reference axis .15
8 Rated power supply .15
8.1 Characteristic to be specified.15
8.2 Method of measurement .16
9 Electrical impedance.16
9.1 Internal impedance .16
9.2 Rated impedance.17
9.3 Minimum permitted load impedance .17
10 Sensitivity.17
10.1 General .17
10.2 Sensitivities with respect to acoustical environment.18
10.3 Sensitivities with respect to nature of signal .20
11 Response .21
11.1 Frequency response .21
11.2 Effective frequency range .21
12 Directional characteristics .22
12.1 Directional pattern .22
12.2 Directivity index .23
12.3 Front-to-rear sensitivity index (0° – 180°) .23
12.4 Noise-cancelling index .24
12.5 Special characteristics for stereo microphones.24
60268-4 © IEC:2004(E) – 3 –
13 Amplitude non-linearity .25
13.1 General .25
13.2 Total harmonic distortion .26
th
13.3 Harmonic distortion of the n order (n = 2, 3,.).26
13.4 Difference frequency distortion of second order.27
14 Limiting characteristics .28
14.1 Rated maximum permissible peak sound pressure.28
14.2 Overload sound pressure.28
15 Balance .28
15.1 Balance of the microphone output.28
15.2 Balance under working conditions .28
16 Equivalent sound pressure level due to inherent noise.29
16.1 Characteristic to be specified.29
16.2 Method of measurement .29
17 Ambient conditions .29
17.1 General .29
17.2 Pressure range.29
17.3 Temperature range .29
17.4 Relative humidity range .
...
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