SIST EN 60268-4:2010

Sound system equipment - Part 4: Microphones (IEC 60268-4:2010)

This part of IEC 60268 specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also details the characteristics to be specified by the manufacturer. It applies to sound system microphones for all applications for speech and music. It does not apply to measurement microphones, but it does apply to each audio channel of microphones having more than one channel, for example for stereo or similar use. It is also applicable to flush-mounted microphones and to the analogue characteristics of microphones with digital audio output. For the purposes of this International Standard, a microphone includes all such devices as transformers, pre-amplifiers, or other elements that form an integral part of the microphone, up to the output terminals specified by the manufacturer.

Elektroakustische Geräte - Teil 4: Mikrofone (IEC 60268-4:2010)

Equipements pour systèmes électroacoustiques - Partie 4: Microphones (CEI 60268-4:2010)

Elektroakustične naprave - 4. del: Mikrofoni (IEC 60268-4:2010)

Ta del IEC 60268 določa metode merjenja za električno impedanco, občutljivost, odzivni krmilni vzorec, dinamično območje in zunanje vplive elektroakustičnih mikrofonov ter hkrati določa značilnosti, ki jih opredeli proizvajalec. Velja za elektroakustične mikrofone za vse uporabe pri govoru in glasbi. Ne velja za merilne mikrofone, vendar pa velja za vsak avdio kanal mikrofonov, ki imajo več kot en kanal, na primer za stereo oziroma podobno uporabo. Velja tudi za vgrezne vgradne mikrofone in za analogne značilnosti mikrofonov z digitalnim avdio izhodom. Za namene tega mednarodnega standarda mikrofon vključuje vse take naprave, kot so transformatorji, predojačevalniki ali drugi elementi, ki tvorijo sestavni del mikrofona, do izhodnih terminalov, ki jih določi proizvajalec.

General Information

• Status: Withdrawn
• Publication Date: 13-Oct-2010
• Withdrawal Date: 06-Nov-2016
• ICS: 33.160.50 - Accessories
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 04-Nov-2016
• Due Date: 27-Nov-2016
• Completion Date: 07-Nov-2016
• Ref Project: EN 60268-4:2010 - Sound system equipment - Part 4: Microphones

Relations

• Replaced By: SIST EN 60268-4:2014 - Sound system equipment - Part 4: Microphones (IEC 60268-4:2014)
• Effective Date: 28-Jan-2023
• Replaces: SIST EN 60268-4:2004 - Sound system equipment -- Part 4: Microphones
• Effective Date: 13-May-2010

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60268-4:2010
01-november-2010
1DGRPHãþD
SIST EN 60268-4:2004
(OHNWURDNXVWLþQHQDSUDYHGHO0LNURIRQL,(&
Sound system equipment - Part 4: Microphones (IEC 60268-4:2010)
Elektroakustische Geräte - Teil 4: Mikrofone (IEC 60268-4:2010)
Equipements pour systèmes électroacoustiques - Partie 4: Microphones (CEI 60268-
4:2010)
Ta slovenski standard je istoveten z: EN 60268-4:2010
ICS:
33.160.50 Pribor Accessories
SIST EN 60268-4:2010 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60268-4:2010

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SIST EN 60268-4:2010

EUROPEAN STANDARD
EN 60268-4

NORME EUROPÉENNE
July 2010
EUROPÄISCHE NORM

ICS 33.160.50 Supersedes EN 60268-4:2004


English version


Sound system equipment -
Part 4: Microphones
(IEC 60268-4:2010)


Equipements pour systèmes Elektroakustische Geräte -
électroacoustiques - Teil 4: Mikrofone
Partie 4: Microphones (IEC 60268-4:2010)
(CEI 60268-4:2010)




This European Standard was approved by CENELEC on 2010-07-01. 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, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60268-4:2010 E

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SIST EN 60268-4:2010
EN 60268-4:2010 - 2 -
Foreword
The text of document 100/1678/FDIS, future edition 4 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 2010-07-01.
This European Standard supersedes EN 60268-4:2004.
The main changes with respect to EN 60268-4:2004 are the following:
– correction of noise measurement;
– added annex for digital microphones;
– added requirement for tolerances in data to be specified.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2011-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-07-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60268-4:2010 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 61606 series NOTE  Harmonized in EN 61606 series (not modified).
IEC 61672-1:2002 NOTE  Harmonized as EN 61672-1:2003 (not modified).
__________

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SIST EN 60268-4:2010
- 3 - EN 60268-4:2010
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
+ A1 (mod) 2005 apparatus - Safety requirements + corr. August 2007
- - + A1 2006
+ A11 2008


IEC 60268-1 1985 Sound system equipment - HD 483.1 S2 1989
+ A1 1988 Part 1: General - -
1)
+ A2 1988 - -


IEC 60268-2 1987 Sound system equipment - HD 483.2 S2 1993
2)
+ A1 1991 Part 2: Explanation of general terms and - -
calculation methods


IEC 60268-3 2000 Sound system equipment - EN 60268-3 2000
Part 3: Amplifiers + corr. January 2002


IEC 60268-5 2003 Sound system equipment - EN 60268-5 2003
+ A1 2007 Part 5: Loudspeakers + A1 2009


IEC 60268-11 1987 Sound system equipment - HD 483.11 S3 1993
+ A1 1989 Part 11: Application of connectors for the - -
3)
+ A2 1991 interconnection of sound system components - -


IEC 60268-12 1987 Sound system equipment - EN 60268-12 1995
+ A1 1991 Part 12: Application of connectors for - -
4)
+ A2 1994 broadcast and similar use + A2 1995


5)
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 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
+ A1 2007 Part 4-3: Testing and measurement + A1 2008
techniques - Radiated, radio-frequency,
electromagnetic field immunity test



1)
HD 483.1 S2 includes A1 to IEC 60268-1.
2)
HD 483.2 S2 includes A1 to IEC 60268-2.
3)
HD 483.11 S3 includes A1 + A2 to IEC 60268-11.
4)
EN 60268-12 includes A1 to IEC 60268-12.
5)
EN 61000-4-2 is superseded by EN 61000-4-2:2009, which is based on IEC 61000-4-2:2008.

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SIST EN 60268-4:2010
EN 60268-4:2010 - 4 -
Publication Year Title EN/HD Year

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


ITU-T 1996 Artificial mouth - -
Recommendation
P.51

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SIST EN 60268-4:2010
IEC 60268-4
®
Edition 4.0 2010-06
INTERNATIONAL
STANDARD


Sound system equipment –
Part 4: Microphones


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
X
ICS 33.160.50 ISBN 978-2-88910-994-4
® Registered trademark of the International Electrotechnical Commission

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SIST EN 60268-4:2010
– 2 – 60268-4 © IEC:2010(E)
CONTENTS
FOREWORD.6
1 Scope.8
2 Normative references.8
3 General conditions.9
3.1 General .9
3.2 Measurement conditions .9
3.2.1 General .9
3.2.2 Rated conditions .10
4 Particular conditions .11
4.1 Pre-conditioning .11
4.2 Sound source .11
4.3 Measurement of sound pressure.11
4.4 Voltage measuring system .11
4.5 Acoustical environment.11
4.5.1 General .11
4.5.2 Free-field conditions .11
4.5.3 Diffuse field conditions.13
4.5.4 Microphone coupled to a sound source by means of a small cavity
coupler .14
4.6 Methods of measuring frequency response .14
4.6.1 Point-by-point and continuous sweep frequency methods .14
4.6.2 Calibration methods .15
4.7 Overall accuracy.15
4.8 Graphical presentation of results.15
5 Type description (acoustical behaviour).16
5.1 Principle of the transducer .16
5.2 Type of microphone .16
5.3 Type of directional response characteristics.16
6 Terminals and controls.16
6.1 Marking .16
6.2 Connectors and electrical interface values .16
7 Reference point and axis .16
7.1 Reference point .16
7.2 Reference axis .16
8 Rated power supply .17
8.1 Characteristic to be specified.17
8.2 Method of measurement .17
9 Electrical impedance.17
9.1 Internal impedance .17
9.1.1 Characteristic to be specified .17
9.1.2 Methods of measurement.17
9.2 Rated impedance.18
9.3 Minimum permitted load impedance .18
10 Sensitivity.18
10.1 General .18
10.2 Sensitivities with respect to acoustical environment.19

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SIST EN 60268-4:2010
60268-4 © IEC:2010(E) – 3 –
10.2.1 Free-field sensitivity.19
10.2.2 Diffuse-field sensitivity .19
10.2.3 Close-talking sensitivity.20
10.2.4 Pressure sensitivity.21
10.3 Sensitivities with respect to nature of signal .21
10.3.1 Rated sensitivity .21
10.3.2 Characteristic sensitivity for speech .21
11 Response .22
11.1 Frequency response .22
11.1.1 Characteristic to be specified .22
11.1.2 Method of measurement .23
11.2 Effective frequency range .23
11.2.1 Characteristic to be specified .23
11.2.2 Method of measurement .23
12 Directional characteristics .23
12.1 Directional pattern .23
12.1.1 Characteristic to be specified .23
12.1.2 Methods of measurement.23
12.2 Directivity index .25
12.2.1 Characteristic to be specified .25
12.2.2 Method of measurement .25
12.3 Front-to-rear sensitivity index (0° – 180°) .25
12.3.1 Characteristic to be specified .25
12.3.2 Method of measurement .25
12.4 Noise-cancelling index .25
12.4.1 Characteristic to be specified .25
12.4.2 Method of measurement .26
12.5 Special characteristics for stereo microphones.26
12.5.1 General .26
12.5.2 Included angle of an XY (left-right) microphone .26
12.5.3 Acceptance angle .26
12.5.4 Threshold angle.27
13 Amplitude non-linearity .27
13.1 General .27
13.2 Total harmonic distortion .27
13.2.1 Characteristics to be specified .27
13.2.2 Method of measurement .27
th
13.3 Harmonic distortion of the n order (n = 2, 3,.) .28
13.3.1 Characteristic to be specified .28
13.3.2 Method of measurement .28
13.4 Difference frequency distortion of second order.29
13.4.1 Characteristic to be specified .29
13.4.2 Method of measurement .29
14 Limiting characteristics .29
14.1 Rated maximum permissible peak sound pressure.29
14.2 Overload sound pressure.30
14.2.1 Characteristic to be specified .30
14.2.2 Method of measurement .30
15 Balance .30

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SIST EN 60268-4:2010
– 4 – 60268-4 © IEC:2010(E)
15.1 Balance of the microphone output.30
15.2 Balance under working conditions .30
16 Equivalent sound pressure level due to inherent noise.31
16.1 Characteristic to be specified.31
16.2 Method of measurement .31
17 Ambient conditions .32
17.1 General .32
17.2 Pressure range.32
17.3 Temperature range .32
17.4 Relative humidity range .32
18 External influences .32
18.1 General .32
18.1.1 Specification and measuring methods .32
18.1.2 Other external interferences.32
18.2 Equivalent sound pressure due to external magnetic fields.33
18.2.1 Characteristic to be specified .33
18.2.2 Method of measurement .33
18.3 Equivalent sound pressure due to mechanical vibration.33
18.3.1 Characteristic to be specified .33
18.3.2 Method of measurement .34
18.4 Equivalent sound pressure due to wind .34
18.4.1 Characteristic to be specified .34
18.4.2 Method of measurement .34
18.5 Transient equivalent sound pressure due to "pop" effect .37
18.5.1 Characteristic to be specified .37
18.5.2 Method of measurement .38
18.6 Equivalent sound pressure due to electromagnetic interference.39
18.6.1 General .39
18.6.2 Characteristic to be specified .39
18.6.3 Method of measurement .39
18.7 Electrostatic discharge.40
19 Magnetic stray field.40
19.1 Characteristic to be specified.40
19.2 Method of measurement .40
20 Physical characteristics.40
20.1 Dimensions .40
20.2 Weight.40
20.3 Cables and connectors .40
21 Classification of the characteristics to be specified.40
21.1 General .40
Annex A (normative) Sound insulation device .43
Annex B (informative) Simplified procedure for “pop” measurements .44
Annex C (informative) Supplement for digital microphones .47
Bibliography .49

Figure 1 – Balance of the output.30
Figure 2 – Balance under working conditions .31

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SIST EN 60268-4:2010
60268-4 © IEC:2010(E) – 5 –
Figure 3 – Measurement set-up for wind influence .35
Figure 4 – Wind generators, type 1 (Figure 4a) and type 2 (Figure 4b)).36
Figure 5 – Electrical and mechanical set-up for the measuring of the "pop" effect .38
Figure A.1 – Sound insulation device.43
Figure B.1 – Measurement set-up.45
Figure B.2 – Test fixture for the sound field sensitivity .46

Table 1 – Reverberation time of the empty room.14
Table 2 – Speech power weighting factor at octave-band centre frequencies .22
Table 3 – Reference signal and characteristics.39
Table 4 – Classification of characteristics .42
Table C.1 – Classification of the characteristics to be specified .47
Table C.2 – Additional digital characteristics to be specified .48

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SIST EN 60268-4:2010
– 6 – 60268-4 © IEC:2010(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SOUND SYSTEM EQUIPMENT –

Part 4: Microphones


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60268-4 has been prepared by IEC technical committee 100: Audio,
video and multimedia systems and equipment.
This fourth edition cancels and replaces the third edition published in 2004, and constitutes a
technical revision.
The main changes with respect to the previous edition are the following:
– correction of noise measurement,
– added annex for digital
...