BS EN 60268-7-2011 Sound system equipment Headphones and earphones《声系统设备 头戴受话器及耳机》.pdf

1、BSI Standards PublicationBS EN 60268-7:2011Incorporating corrigendum November 2012Sound system equipment Part 7: Headphones and earphonesBS EN 60268-7:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 60268-7:2011. It is identical to IEC 60268-7:2010, incorpo

2、rating corrigendum November 2012. It supersedes BS EN 60268-7:1996 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on this committee can be obtained on reque

3、st to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 81762 5ICS 33.160.50Compliance with a British

4、Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2011.Amendments/corrigenda issued since publicationDate Text affected28 February 2014 Implementation of IEC corrigendum November 20

5、12: item c) in Annex A amendedEUROPEAN STANDARD EN 60268-7 NORME EUROPENNE EUROPISCHE NORM March 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17,

6、B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60268-7:2011 E ICS 33.160.50 Supersedes EN 60268-7:1996English version Sound system equipment - Part 7: Headphones and earphones (IEC 60268-7:2010) Equipements

7、 pour systmes lectroacoustiques - Partie 7: Ecouteurs et oreillettes (CEI 60268-7:2010) Elektroakustische Gerte - Teil 7: Kopfhrer und Ohrhrer (IEC 60268-7:2010) This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulation

8、s 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 Eur

9、opean 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

10、 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, Slov

11、enia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60268-7:2011EN 60268-7:2011 - 2 - Foreword The text of document 100/1621/FDIS, future edition 3 of IEC 60268-7, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and

12、 was approved by CENELEC as EN 60268-7 on 2011-01-02. This European Standard supersedes EN 60268-7:1996. EN 60268-7:2011 contains the following changes: clause/subclause renumbering in accordance with ISO/IEC Directives, Part 2; addition of a measurement system using HATS; addition of details on pin

13、na simulators for high measurement reproducibility, see Annex A. 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

14、 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) 2011-10-02 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-01-02 Annex ZA has been added by CENELEC

15、. _ Endorsement notice The text of the International Standard IEC 60268-7:2010 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 60065 NOTE Harmonized as EN 60065.

16、IEC 60118-0 IEC 60268 series IEC 60268-3 IEC 60268-4 IEC 60268-5 IEC 60318-1 IEC 60318-2 IEC 60318-3 IEC 60318-5 IEC 61672 series IEC 61938 ISO 7029:2000 ISO 18233 NOTE Harmonized as EN 60118-0. NOTE Harmonized in EN 60268 series (not modified). NOTE Harmonized as EN 60268-3. NOTE Harmonized as EN 6

17、0268-4. NOTE Harmonized as EN 60268-5. NOTE Harmonized as EN 60318-1. NOTE Harmonized as EN 60318-2. NOTE Harmonized as EN 60318-3. NOTE Harmonized as EN 60318-5. NOTE Harmonized in EN 61672 series (not modified). NOTE Harmonized as EN 61938. NOTE Harmonized as EN ISO 7029:2000 (not modified). NOTE

18、Harmonized as EN ISO 18233. _ BS EN 60268-7:2011- 3 - EN 60268-7:2011 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

19、, 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 Y

20、ear IEC Guide 106 - Guide for specifying environmental conditions for equipment performance rating - - IEC 60038 - IEC standard voltages - IEC 60050-801 1994 International Electrotechnical Vocabulary (IEV) - Chapter 801: Acoustics and electroacoustics - - IEC 60068-1 - Environmental testing - Part 1

21、: General and guidance EN 60068-1 - IEC 60086-1 - Primary batteries - Part 1: General EN 60086-1 - IEC 60263 - Scales and sizes for plotting frequency characteristics and polar diagrams - - IEC 60268-1 - Sound system equipment - Part 1: General HD 483.1 S2 - IEC 60268-2 - Sound system equipment - Pa

22、rt 2: Explanation of general terms and calculation methods HD 483.2 S2 - IEC 60268-11 - Sound system equipment - Part 11: Application of connectors for the interconnection of sound system componentsHD 483.11 S3- IEC 60268-12 - Sound system equipment - Part 12: Application of connectors for broadcast

23、 and similar use EN 60268-12- IEC 60711 - Occluded-ear simulator for the measurement of earphones coupled to the ear by ear insertsHD 443 S1 - IEC/TR 60959 - Provisional head and torso simulator for acoustic measurements on air conduction hearing aids - - IEC 61672-1 - Electroacoustics - Sound level

24、 meters - Part 1: Specifications EN 61672-1 - ISO 3741 - Acoustics - Determination of sound power levels of noise sources using sound pressure -Precision methods for reverberation rooms EN ISO 3741 - BS EN 60268-7:2011EN 60268-7:2011 - 4 - Publication Year Title EN/HD Year ISO 4869-1 - Acoustics - H

25、earing protectors - Part 1: Subjective method for the measurement of sound attenuation EN 24869-1 - ISO 4869-3 - Acoustics - Hearing protectors - Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture EN ISO 4869-3 - ISO 7619-1 - Rubber, vulcanized or thermo

26、plastic - Determination of indentation hardness - Part 1: Durometer method (Shore hardness) - - BS EN 60268-7:2011 2 60268-7 IEC:2010(E) CONTENTS 1 Scope.6 2 Normative references .6 3 Terms and definitions .7 4 Classification, designation and coding 9 5 Marking of terminals, controls and polarity13

27、6 User instructions 13 7 Conditions for specifications and measurements 14 7.1 Rated conditions .14 7.2 Standard conditions for measurement .15 7.3 Couplers and ear simulators15 7.4 Measurement conditions for simulated programme signal15 7.5 Loudness comparison conditions.16 7.5.1 General .16 7.5.2

28、Free-field comparison conditions .16 7.5.3 Diffuse-field comparison conditions .17 7.6 Ear canal sound pressure level measurement conditions.17 8 Characteristics to be specified and their methods of measurement.17 8.1 Power supply.17 8.2 Electrical impedance .17 8.2.1 Rated impedance 17 8.2.2 Impeda

29、nce/frequency characteristic.18 8.2.3 Rated source impedance .18 8.3 Input voltage .18 8.3.1 Rated source e.m.f. .18 8.3.2 Limiting values of input voltage18 8.3.3 Characteristic voltage19 8.3.4 Simulated programme signal characteristic voltage .20 8.3.5 Simulated programme signal characteristic vol

30、tage corrected by A-weighting characteristics and free-field response compensation.20 8.3.6 Protective devices .21 8.4 Input power .21 8.5 Sound pressure (level) 22 8.5.1 General .22 8.5.2 Characteristics to be specified.22 8.5.3 Method of measurement 22 8.6 Frequency response23 8.6.1 General .23 8.

31、6.2 Coupler or ear simulator (including HATS) frequency response .23 8.6.3 Free-field comparison frequency response 24 8.6.4 Diffuse-field comparison frequency response.25 8.6.5 Free-field and diffuse-field ear canal sound pressure level frequency responses25 8.6.6 Rated frequency range 27 8.7 Ampli

32、tude non-linearity27 8.7.1 General .27 BS EN 60268-7:201160268-7 IEC:2010(E) 3 8.7.2 Harmonic distortion .27 8.7.3 Modulation distortion .28 8.7.4 Difference-frequency distortion28 8.8 Rated climatic conditions.29 8.9 External electric and/or magnetic field.29 8.9.1 Characteristics to be specified.2

33、9 8.9.2 Method of measurement 29 8.10 Unwanted sound radiation .29 8.10.1 Characteristic to be specified.29 8.10.2 Method of measurement 30 8.11 Sound attenuation .30 8.11.1 Characteristic to be specified.30 8.11.2 Method of measurement 30 8.12 Crosstalk attenuation for multi-channel headphones30 8.

34、12.1 Characteristic to be specified.30 8.12.2 Method of measurement 30 8.13 Application force .30 8.13.1 Characteristic to be specified.30 8.13.2 Method of measurement 30 8.14 Physical characteristics, cables and connectors 31 8.14.1 Characteristics to be specified.31 9 Classification of characteris

35、tics 32 Annex A (normative) Pinna simulators for measurements of headphones and earphones 33 Annex B (normative) Specification and conditions of use of a microphone for use inside the ear canal.42 Annex C (informative) Practical details of free-field comparison conditions 43 Annex D (informative) Pr

36、actical details of diffuse-field comparison conditions44 Annex E (informative) Practical details of the subjective comparison and ear canal sound pressure level conditions 45 Bibliography46 Figure 1 Diagrammatic horizontal sections showing types of earphones and their spatial relationships with the

37、pinna and/or canal entrance.11 Figure 2 Diagrams showing the four possible construction: acoustically open or closed, and closed- or open-back13 Figure 3 Illustrated measurement diagram by simulated programme signal 16 Figure A.1 Shape of the recommended pinna simulator .34 Figure A.2 Coordinate for

38、 the recommended pinna simulator .35 Figure A.3 Cross-sectional shapes and dimensions of the recommended pinna simulator, horizontal section .38 Figure A.4 Cross-sectional shapes and dimensions of the recommended pinna simulator, vertical section .41 Table 1 Classification of characteristics .32 BS

39、EN 60268-7:2011 6 60268-7 IEC:2010(E) SOUND SYSTEM EQUIPMENT Part 7: Headphones and earphones 1 Scope This part of IEC 60268, is applicable to headphones, headsets, earphones and earsets, intended to be used on, or in, the human ear. It also applies to equipment, such as pre-amplifiers, passive netw

40、orks and power supplies which form an integral part of the headphone system. It does not deal with: a) safety, for which reference should be made to IEC 60065 or another appropriate standard; b) the characteristics of microphones of headsets, for which reference should be made to IEC 60268-4; c) ear

41、phones and other devices for hearing aids, for which reference should be made to IEC 60118-0; d) headphones for audiometry; e) headphones and other devices which form part of an active ear-defender system, although some of its provisions may be applicable. This standard specifies the characteristics

42、 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, and a classification code which may also

43、be used for marking. 2 Normative references 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. IEC 6

44、0038, IEC standard voltages IEC 60050(801):1994, International Electrotechnical Vocabulary Chapter 801: Acoustics and electroacoustics IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60086-1, Primary batteries Part 1: General IEC Guide 106, Guide for specifying environmental cond

45、itions for equipment performance rating IEC 60263, Scales and sizes for plotting frequency characteristics and polar diagrams IEC 60268-1, Sound system equipment Part 1: General IEC 60268-2, Sound system equipment Part 2: Explanation of general terms and calculation methods BS EN 60268-7:201160268-7

46、 IEC:2010(E) 7 IEC 60268-11, Sound system equipment Part 11: Application of connectors for the interconnection of sound system components IEC 60268-12, Sound system equipment Part 12: Application of connectors for broadcast and similar use IEC 60711, Occluded-ear simulator for the measurement of ear

47、phones coupled to the ear by ear inserts1IEC TR 60959, Provisional head and torso simulator for acoustic measurements on air conduction hearing aids2IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications ISO 3741, Acoustics Determination of sound power levels of noise sources using

48、sound pressure Precision methods for reverberation rooms ISO 4869-1, Acoustics Hearing protectors Part 1: Subjective method for the measurement of sound attenuation ISO 4869-3, Acoustics Hearing protectors Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixtu

49、re ISO 7619-1, Rubber, vulcanized and thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply, see also IEC 60050-801 (IEV). NOTE Any device defined in 3.1 to 3.15 and their connector(s) for electrical input should be regarded as part of the transducer. 3.1 earphone electroacoustic transducer by which acoustic oscillations are