EN 61094-5:2001

Measurement microphones - Part 5: Methods for pressure calibration of working standard microphones by comparison

Applies to working standard microphones with removable protection grids meeting the requirements of EN 61094-4 and to laboratory standard microphones meeting the requirements of EN 61094-1. Describes methods of determining the pressure sensitivity by comparison with either a laboratory standard microphone that has been calibrated according to EN 61094-2, or another working standard microphone that has been calibrated according to this part of EN 61094.

Messmikrofone - Teil 5: Verfahren zur Druckkammer-Kalibrierung von Gebrauchs-Normalmikrofonen nach der Vergleichsmethode

Microphones de mesure - Partie 5: Méthodes pour l'étalonnage en pression par comparaison des microphones étalons de travail

S'applique aux microphones étalons de travail munis d'une grille de protection amovible satisfaisant aux prescriptions de la EN 61094-4 et aux microphones étalons de laboratoire satisfaisant aux prescriptions de la EN 61094-1. Décrit également des méthodes pour déterminer l'efficacité en pression par comparaison, soit à un microphone étalon de laboratoire qui a été étalonné selon la EN 61094-2, soit à un autre microphone étalon de travail qui a été étalonné selon la présente partie de la EN 61094.

Merilni mikrofoni - 5. del: Metode za primerjalno kalibriranje tlaka delujočega standardnega mikrofona (IEC 61094-5:2001)

General Information

• Status: Withdrawn
• Publication Date: 13-Dec-2001
• Withdrawal Date: 30-Nov-2004
• ICS: 17.140.50 - Electroacoustics
• Technical Committee: CLC/SR 29 - Electroacoustics
• Drafting Committee: IEC/TC 29 - IEC_TC_29
• Parallel Committee: IEC/TC 29 - IEC_TC_29
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 04-Jul-2019
• Completion Date: 04-Jul-2019
• Ref Project: SIST EN 61094-5:2007 - Measurement microphones -- Part 5: Methods for pressure calibration of working standard microphones by comparison

Relations

• Replaced By: EN 61094-5:2016 - Electroacoustics - Measurement microphones - Part 5: Methods for pressure calibration of working standard microphones by comparison
• Effective Date: 06-Sep-2016

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EUROPEAN STANDARD EN 61094-5
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2001
ICS 17.140.50
English version
Measurement microphones
Part 5: Methods for pressure calibration of
working standard microphones by comparison
(IEC 61094-5:2001)
Microphones de mesure Messmikrofone
Partie 5: Méthodes pour l'étalonnage Teil 5: Verfahren zur Druckkammer-
en pression par comparaison des Kalibrierung von Gebrauchs-
microphones étalons de travail Normalmikrofonen nach der
(CEI 61094-5:2001) Vergleichsmethode
(IEC 61094-5:2001)
This European Standard was approved by CENELEC on 2001-12-04. 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, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, 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
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61094-5:2001 E
Foreword
The text of document 29/495/FDIS, future edition 1 of IEC 61094-5, prepared by IEC TC 29,
Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC
as EN 61094-5 on 2001-12-04.
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) 2002-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-12-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annexes A, B, C and D are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61094-5:2001 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61094-5:2001
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
1) 2)
IEC 61094-1 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
1) 2)
IEC 61094-4 Part 4: Specifications for working EN 61094-4 1995
standard microphones
ISO/IEC GUIDE 1995 Guide to the expression of uncertainty--
EXPRES in measurement (GUM)
1)
undated reference.
2)
valid edition at date of issue.

NORME CEI
INTERNATIONALE IEC
61094-5
INTERNATIONAL
Première édition
STANDARD
First edition
2001-10
Microphones de mesure –
Partie 5:
Méthodes pour l'étalonnage en pression
par comparaison des microphones étalons
de travail
Measurement microphones –
Part 5:
Methods for pressure calibration of working
standard microphones by comparison
 IEC 2001 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
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
Q
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61094-5  IEC:2001 – 3 –
CONTENTS
FOREWORD.5
1 Scope.7
2 Normative references.7
3 Terms and definitions .7
4 Reference environmental conditions.9
5 Principles of pressure calibration by comparison .9
5.1 Principles .9
5.2 Measuring the output voltages of the microphones .11
6 Factors influencing the pressure sensitivity .11
6.1 General .11
6.2 Microphone pressure equalizing leakage.11
6.3 Polarising voltage .13
6.4 Ground shield reference configuration.13
6.5 Pressure distribution over the diaphragms.13
6.6 Dependence on environmental conditions .15
6.7 Validation .15
7 Calibration uncertainty components.15
7.1 General .15
7.2 Sensitivity of the reference microphone.15
7.3 Measurements of microphone output .15
7.4 Differences between the sound pressure at the test microphone and that at
the reference microphone .17
7.5 Uncertainty on pressure sensitivity level.17
Annex A (informative) Examples of couplers and jigs for simultaneous excitation.19
Annex B (informative) Examples of couplers for sequential excitation .25
Annex C (informative) Determining the open-circuit sensitivity of a measurement
microphone without using the insert-voltage method .29
Annex D (informative) Typical uncertainty analysis .31
Bibliography .35
Figure A.1 – A coupler for use with WS2 microphones.19
Figure A.2 – A jig fitted with an LS2 and WS2 microphone.21
Figure A.3 – Example arrangement of LS2 and WS2 microphones in a jig.21
Figure A.4 – Example arrangement of LS2 and WS3 microphones in a jig.21
Figure B.1 – A coupler for use with LS1 microphones .25
Figure B.2 – A coupler for use with WS2 microphones.27
Table A.1 – Calculated corrections to be added to the sensitivity level of the WS3
microphone when using the arrangement in figure A.4 .23
Table D.1 – Uncertainties .33

61094-5  IEC:2001 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MEASUREMENT MICROPHONES –
Part 5: Methods for pressure calibration of working standard
microphones by comparison
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61094-5 has been prepared by IEC technical committee 29:
Electroacoustics.
The text of this standard is based on the following documents:
FDIS Report on voting
29/495/FDIS 29/497/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annexes A, B, C and D are for information only.
The committee has decided that the contents of this publication will remain unchanged until
2006. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61094-5  IEC:2001 – 7 –
MEASUREMENT MICROPHONES –
Part 5: Methods for pressure calibration of working standard
microphones by comparison
1 Scope
This part of IEC 61094 is applicable to working standard microphones with removable
protection grids meeting the requirements of IEC 61094-4 and to laboratory standard micro-
phones meeting the requirements of IEC 61094-1.
This part of IEC 61094 also describes methods of determining the pressure sensitivity by
comparison with either a laboratory standard microphone that has been calibrated according to
IEC 61094-2, or another working standard microphone that has been calibrated according
to this part of IEC 61094.
Alternative comparison methods based on the principles described in IEC 61094-2 are possible
but beyond the scope of this part of IEC 61094.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61094. For dated references, subsequent amendments
to, or revisions of, any of these publications do not apply. However, parties to agreements
based on this part of IEC 61094 are encouraged to investigate the possibility of applying the
most recent editions of the normative documents indicated below. For undated references, the
latest edition of the normative document referred to applies. Members of IEC and ISO mainta
...