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1、BRITISH STANDARD BS EN 60268-7:1996 BS 6840-7: 1996 IEC 268-7: 1996 Sound system equipment Part 7: Headphones and earphones The European Standard EN 60268-7:1996 has the status of a British Standard ICS 33.160.50 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:38:33 GMT+00:00 2006, Uncontr
2、olled Copy, (c) BSI BS EN 60268-7:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1996 BSI 11-1998 The following BSI references relate to the work
3、 on this standard: Committee reference EPL/100/3 Draft for comment 93/200714 DC ISBN 0 580 26320 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems and equipment, to Subcommitte
4、e EPL/100/3, Equipment and systems in the field of audio, video and audiovisual engineering, upon which the following bodies were represented: Association of British Theatre Technicians Audio Engineering Society British Broadcasting Corporation British Educational Suppliers Association British Feder
5、ation of Audio British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Federation of the Electronics Industry Independant Television Association (ITVA) Institute of Sound and Communication Engineers Institution of Electrical Engineers International Association
6、 of Broadcasting Manufacturers Professional Lighting and Sound Association Royal Institute of British Architects Royal National Institute for Deaf People Society of Cable Television Engineers Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov
7、 11 09:38:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-7:1996 BSI 11-1998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60268-73 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:38:33 GMT+00:
8、00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-7:1996 ii BSI 11-1998 National foreword This British Standard has been prepared by Subcommittee EPL/100/3 and is the English language version of EN 60268-7:1996 Sound system equipment Part 7: Headphones and earphones, published by the Committee for Ele
9、ctrotechnical Standardization (CENELEC). It is identical to IEC 268-7:1996, published by the International Electrotechnical Commission (IEC). The additional designation of this standard as BS 6840-7 has been retained for ease of reference in relation to other Parts of BS 6840 (IEC 268 series). BS 68
10、40 consists of the following Parts: Part 1: Methods for specifying and measuring general characteristics used for equipment performance; Part 2: Glossary of general terms and calculation methods; Part 3: Methods for specifying and measuring the characteristics of sound system amplifiers; Part 4: Met
11、hods for specifying and measuring the characteristics of microphones; Part 5: Methods for specifying and measuring the characteristics of loudspeakers; Part 6: Methods for specifying and measuring the characteristics of auxiliary passive elements; Part 7: Headphones and earphones; (BS EN 60268-7) Pa
12、rt 8: Methods for specifying and measuring the characteristics of automatic gain control devices; Part 9: Methods for specifying and measuring the characteristics of artificial reverberation, time delay and frequency shift equipment; Part 10: Methods for specifying and measuring the characteristics
13、of peak programme level meters; Part 11: Specification for application of connectors for the interconnection of sound system components; Part 12: Specification for applications of connectors for broadcast and similar use; (BS EN 60268-12) Part 13: Guide for listening tests on loudspeakers; Part 14:
14、Guide for circular and elliptical loudspeakers; outer frame diameters and mounting dimensions; Part 15: Specification for matching values for the interconnection of sound system components; Part 16: Guide to the “RASTI” method for the objective rating of speech intelligibility in auditoria; Part 17:
15、 Methods for specifying and measuring their characteristics of standard volume indicators; Part 18: Peak programme level meters: Guide for digital audio peak level meter. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:38:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-7:1996 BSI
16、 11-1998iii Cross-references Publication referred toCorresponding British Standard EN 23741:1991BS 4196 Sound power levels of noise sources (ISO 3741:1988)Part 1:1991 Precision methods for determination of sound power levels for broad-band sources in reverberation rooms BS EN 24869 Acoustics. Hearin
17、g protectors EN 24869-1:1992BS EN 24689-1:1993 Sound attenuation of hearing (ISO 4869-1:1990)protectors. Subjective method of measurement EN 24869-3:19931) BS EN 24869-3:1994 Simplified method for (ISO/TR 4869-3:1989)measurement of insertion loss of ear-muff type protectors for quality inspection pu
18、rposes HD 472 S1:1989BS 7697:1993 Nominal voltages for low voltage public electricity supply systems IEC 50(801):1994BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms. Part 3 Terms particular to telecommunications and electronics Group 08:1995 Aco
19、ustics and electroacoustics EN 60068 seriesBS EN 60068 Environmental testing EN 60086 seriesBS EN 60086 Primary batteries HD 323 seriesBS 2011 Environmental testing (IEC 68 series) HD 211.2 S9:1993BS 397 Primary batteries (IEC 86 series) IEC 263:1982BS 6397:1983 Specification for scales and sizes fo
20、r plotting frequency charateristics and polar diagrams HD 483BS 6840 Sound system equipment HD 483.1 S2:1989Part 1:1987 Methods for specifying and measuring (IEC 268-1:1985)general characteristics used for equipment performance HD 483.2 S2:1993Part 2:1993 Glossary of general terms and (IEC 268-2:198
21、7)calculation methods HD 483.3 S2:1992Part 3:1992 Methods for specifying and measuring (IEC 268-3:1988)the characteristics of sound system amplifiers HD 483.11 S3:1993Part 11:1994 Specification for application of (IEC 268-11:1987)connectors for the interconnection of sound system components HD 483.1
22、5 S4:1992Part 15:1992 Specification for matching values for (IEC 268-15:1987)the interconnection of sound system components EN 60268-12:1987BS EN 60268 Sound system equipment BS EN 60268-12:1995 Application of connectors for broadcast and similar use HD 443 S1:1983BS 6310:1982 Specification for occl
23、uded-ear (IEC 711:1981)simulator for the measurement of earphones coupled to the ear by ear inserts HD 549 S1:1989BS 7154:1989 Specification for conference systems: (IEC 914:1988)electrical and audio requirements 1) Now published by CEN. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:38:3
24、3 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-7:1996 iv BSI 11-1998 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself co
25、nfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN title page, pages 2 to 24, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. T
26、his will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:38:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60268-7 May 1996 ICS 17.140.50; 33.160.50 Descriptors: Electroacoust
27、ic equipment, headphones, earphones, definition, designation, classification, specification, characteristics, measurement English version Sound system equipment Part 7: Headphones and earphones (IEC 268-7:1996) Equipements pour systmes lectroacoustiques Partie 7: Casques et couteurs (CEI 268-7:1996)
28、 Elektroakustische Gerte Teil 7: Kopfhrer und Ohrhrer (IEC 268-7:1996) This European Standard was approved by CENELEC on 1996-03-05. 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
29、 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 an
30、y 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, Denmark, Finland, France, Ge
31、rmany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central S
32、ecretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 60268-7:1996 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:38:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60268-7:1996 BSI 11-1998 2 Foreword The text of document 84/417/FDIS, fu
33、ture edition 2 of IEC 268-7, prepared by TC 84 (transformed into SC 100C, Equipment and systems in the field of audio, video and audiovisual engineering, of IEC TC 100, Audio, video and multimedia systems and equipment), was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as E
34、N 60268-7 on 1996-03-05. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, annexes A and ZA are normative and annexes B, C, D and E are informative. Annex ZA has been
35、 added by CENELEC. In the official version, for annex E, Bibliography, the following notes have been added for the standards indicated: Contents Page Foreword2 1General3 1.1Scope3 1.2Normative references3 1.3Definitions4 1.4Classification, designation and coding5 1.5Marking of terminals, controls an
36、d polarity9 1.6User instructions9 2Conditions for specifications and measurements9 Page 2.1Rated conditions9 2.2Standard conditions for measurement9 2.3Couplers and ear simulators10 2.4Loudness comparison conditions10 2.5Ear canal sound pressure level measurement conditions10 3Characteristics to be
37、specified and their methods of measurement11 3.1Power supply11 3.2Electrical impedance11 3.3Input voltage11 3.4Input power13 3.5Sound pressure (level)13 3.6Frequency response13 3.7Amplitude non-linearity16 3.8Rated climatic conditions (these are rated conditions)17 3.9External magnetic field17 3.10
38、Unwanted sound radiation17 3.11 Sound attenuation18 3.12 Crosstalk attenuation for multi-channel headphones18 3.13 Application force (this is a rated condition)18 3.14 Physical characteristics, cables and connectors18 4Classification of characteristics19 Annex A (normative) Specification and conditi
39、ons of use of a microphone for use inside the ear canal20 Annex B (informative) Practical details of free-field comparison conditions20 Annex C (informative) Practical details of diffuse-field comparison conditions20 Annex D (informative) Practical details of the subjective comparison and ear canal
40、sound pressure level conditions21 Annex E (informative) Bibliography22 Annex ZA (normative) Normative references to international publications with their corresponding European publications23 Figure 1 Diagrammatic horizontal sections showing types of earphone and their spatial relationships with the
41、 pinna and/or canal entrance6 Figure 2 Diagrams showing the four possible constructions: acoustically open or closed, and closed- or open-back8 Table 1 Classification of characteristics19 latest date by which the EN has to be implemented at national level by publication of an identical national stan
42、dard or by endorsement(dop) 1996-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1996-12-01 IEC 65 NOTEHarmonized, together with its amendments 1:1987 + 2:1989 + 3:1992 as EN 60065:1993 (modified). IEC 118-0 NOTEHarmonized as EN 60118-0:1993 (not m
43、odified) Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:38:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60268-7:1996 BSI 11-19983 1 General 1.1 Scope This part of IEC 268 applies to headphones, headsets, earphones and earsets, intended to be used on, or in, the human ear. It also appl
44、ies to equipment, such as pre-amplifiers, passive networks and power supplies which form an integral part of the headphone system. It does not deal with: safety, for which reference should be made to IEC 65 12) or another appropriate standard; the characteristics of microphones of headsets, for whic
45、h reference should be made to IEC 268-4 2; earphones and other devices for hearing aids, for which reference should be made to IEC 118-0 3; headphones for audiometry; headphones and other devices which form part of an active ear-defender system, although some of its provisions may be applicable. Thi
46、s standard specifies the characteristics which should be included by the manufacturer in specifications, and relevant methods of measurement. It includes a classification of the different types of earphone, mainly characterized by the way in which the transducer is coupled acoustically to the ear, a
47、nd a classification code which may also be used for marking. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 268. At the time of publication, the editions indicated were valid. All normativ
48、e documents are subject to revision, and parties to agreements based on this part of IEC 268 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Stand
49、ards. IEC 38:1983, IEC standard voltages. IEC 50(801):1994, International Electrotechnical Vocabulary Chapter 801: Acoustics and electroacoustics. IEC 68, Basic environmental testing procedures. IEC 86, Primary batteries. IEC Guide 106:1989, Guide for specifying environmental conditions for equipment performance rating. IEC 263:1982, Scales and sizes for plotting frequency characteristics and polar diagrams. IEC 268-1:1985, Sound system equipment Part 1: General. IEC 268-2:1987, Sound system equipm