1、INTERNATIONALSTANDARDIEC61842First edition2002-03Microphones and earphonesfor speech communicationsReference numberIEC 61842:2002(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numberingAs from 1 January 1997 all IEC pub
2、lications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase pu
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7、information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,
8、SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC61842First edition2002-03Microphones and earphonesfor speech communications IEC 2002 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopyin
9、g and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chUFor price,see current cataloguePRICE CODECommissio
10、n Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61842 IEC:2002(E)CONTENTSFOREWORD.31Scope.42Normative references.43Terms and definitions.43.1Classification.43
11、.2Devices for measurement.63.3Characteristics and performance.64Characteristics and measuring procedures.74.1General conditions.74.2Rated conditions.84.3Measuring conditions.94.4Microphones for speech communications.114.5Earphones for speech communications.135Connectors and contact designation.155.1
12、Miniature 4-position connector.155.2Concentric connector.156Endurance of insulation.157Characteristics to be specified.15Annex A(informative)Miniature 4-position connector.25Annex B(informative)Sub-miniature 2,5 mm concentric connector with three contacts.27Bibliography.28Figure 1 Artificial ear for
13、 ordinary earphones.18Figure 2 Example of the case for microphone unit measurement.18Figure 3 Example of the case for earphone unit measurement.19Figure 4 Determination of the artificial mouth position from the earcap reference point.20Figure 5 Calibration system diagram for output sound pressure fr
14、om artificial mouth.20Figure 6 Measuring system diagram for microphone unit sensitivity.21Figure 7 Diagram of listening test for normal operation of microphone.22Figure 8 Measuring system diagram for earphone sensitivity.23Figure 9 Diagram of listening test for normal operation of earphone.24Figure
15、10 Connection designation for plug of miniature 4-position connector.24Figure A.1 Shape and basic dimensions of plug for miniature 4-position connector.25Figure A.2 Shape of plug interface part of jack for miniature 4-position connector.26Figure B.1 2,5 mm pin concentric connector(plug)with three co
16、ntacts(tip,ring andsleeve).27Table 1 Definitions of earphone,headphone,earset and headset.16Table 2 Characteristics of microphones for speech communication to be specifiedand classification.16Table 3 Characteristics of earphones for speech communication to be specifiedand classification.17LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61842 IEC:2002(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION_MICROPHONES AND EARPHONES FOR SPEECH
