BS EN 61842-2002 Microphones and earphones for speech communications《语音通信用传声器和耳机》.pdf

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1、BRITISH STANDARD BS EN 61842:2002 Microphones and earphones for speech communications The European Standard EN 61842:2002 has the status of a British Standard ICS 33.160.50; 17.140.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 61842:2002 This British Standard, having

2、 been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 9 July 2002 BSI 9 July 2002 ISBN 0 580 39989 3 National foreword This British Standard is the official English language

3、 version of EN 61842:2002. It is identical with IEC 61842:2002. The UK participation in its preparation was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems, to Subcommittee EPL/100/3, Equipment and systems in the field, which has the responsibility to: A list of organiz

4、ations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering syst

5、em to the other, publications may contain identifiers from both system. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Inde

6、x”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself conf

7、er immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulga

8、te them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 30, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publicatio

9、n Amd. No. Date CommentsEUROPEAN STANDARD EN 61842 NORME EUROPENNE EUROPISCHE NORM June 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1

10、050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61842:2002 E ICS 33.160.50; 17.140.50 English version Microphones and earphones for speech communications (IEC 61842:2002) Microphones et couteurs pour communicatio

11、ns vocales (CEI 61842:2002) Mikrofone und Kopfhrer fr Sprachkommunikation (IEC 61842:2002) This European Standard was approved by CENELEC on 2002-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the

12、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, Germ

13、an). 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.