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1、BRITISH STANDARD BS EN 60268-5:1997 IEC 268-5: 1989 (including Amendments 1 and 2 to IEC 268-5:1989) Incorporating Amendment No. 1 to BS 6840-5:1995 which renumbers the BS as BS EN 60268-5 Sound system equipment Part 5: Loudspeakers ICS 17.140.50;33.160.50 Licensed Copy: sheffieldun sheffieldun, na,
2、 Sat Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-5:1997 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 November 1995 BSI 04-1999 Firs
3、t published June 1990 Second edition November 1995 The following BSI references relate to the work on this standard: Committee reference EPL/84 Draft for comment 90/28745 DC ISBN 0 580 24263 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to
4、Technical Committee EPL/84, 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 Associatio
5、n British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Consumers Association Federation of British Audio Federation of the Electronics Industry Independent Television Association Institution of Electrical Engineers International Association of Broadcasting
6、Manufacturers National Council for Educational Technology (NCET) Professional Lighting and Sound Association Royal Institute of British Architects Royal National Institute for Deaf People Society of Cable Television Engineers Sound and Communication Industries Federation Amendments issued since publ
7、ication Amd. No.Date Comments 9409April 1997Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-5:1997 BSI 04-1999i Contents Page Committees responsibleInside front cover National forewordii Fore
8、word2 Text of EN 60268-55 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-5:1997 ii BSI 04-1999 National foreword This British Standard has been prepared by Subcommittee EPL/100/3 (previously T
9、echnical Committee EPL/84) and is the English language version of EN 60268-5:1996 Sound system equipment Part 5: Loudspeakers and its amendment EN 60268-5/A2:1996, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 268-5:1989 and amendments A
10、1:1993 and A2:1996, published by the International Electrotechnical Commission (IEC). The cross-reference of this standard as Part 5 of the BS 60268 series has been retained to facilitate reference to other parts of the series. IEC 268 consists of the following Parts, most of which have been publish
11、ed as Parts of BS 60268: Part 1: General; Part 2: Explanation of general terms and calculation methods; Part 3: Amplifiers; Part 4: Microphones; Part 5: Loudspeakers; (BS EN 60268-5) Part 6: Auxiliary passive elements; Part 7: Headphones and earphones; (BS EN 60268-7) Part 8: Automatic gain control
12、devices; Part 9: Artificial reverberation, time delay and frequency shift equipment; Part 10: Peak programme level meters; Part 11: Application of connectors for the interconnection of sound system components; Part 12: Application of connectors for broadcast and similar use; (BS EN 60268-12) Part 13
13、: Listening tests on loudspeakers; Part 14: Circular and elliptical loudspeakers; outer frame diameters and mounting dimensions; Part 15: Preferred matching values for the interconnection of sound system components; Part 16: The objective rating of speech intelligibility in auditoria by the “RASTI”
14、method; Part 17: Standard volume indicators; Part 18: Peak programme level meters Digital audio peak level meter. Cross-references Publication referred toCorresponding British Standard IEC 50 (151):1978BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour t
15、erms Part 1 Terms common to power, telecommunications and electronics Group 02:1980 Electrical and magnetic devices terminology EN 60065:1993 (IEC 65:1985) BS EN 60065:1994 Safety requirements for mains operated electronic and related apparatus for household and similar general use EN 60065:1993 (IE
16、C 65:1985) BS EN 60065:1994 Safety requirements for mains operated electronic and related apparatus for household and similar general use Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-5:1997 BSI 04-1999iii A British Standard do
17、es 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 confer immunity from legal obligations. Summary of pages This document comprises a front cover, an ins
18、ide front cover, pages i to iv, the EN title page, pages 2 to 28, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Cross-references Publication
19、 referred toCorresponding British Standard EN 61260:1996 (IEC 1260:1995) BS EN 61260:1996 Electroacoustics. Octave-band and fractional-octave-band filters IEC 263:1982BS 6397:1983 Specification for scales and sizes for plotting frequency characteristics and polar diagrams BS 60268 Sound system equip
20、ment HD 483.1 S2 1989 (IEC 268-1:1985) Part 1:1987 Methods for specifying and measuring general characteristics used for equipment performance HD 483.2 S2:1993 IEC 268-2:1987) Part 2:1993 Glossary of general terms and calculation methods HD 483.11 S3:1993 (IEC 268-11:1987) Part 11:1994 Specification
21、 for application of connectors for the interconnection of sound system components BS EN 60268 Sound system equipment EN 60268-12:1995 (IEC 268-12:1987) BS EN 60268-12:1995 Application of connectors for broadcast and similar use BS 6840 Sound system equipment IEC 268-14:1980Part 14:1987 Guide for cir
22、cular and elliptical loudspeakers; outer frame diameters and mounting dimensions EN 60651:1994 (IEC 651:1979) BS EN 60651:1994 Specification for sound level meters BS 4196 Sound power levels of noise sources EN 23741:1991 (ISO 3741:1988) Part 1:1991 Precision methods for determination of sound power
23、 levels for broad-band sources in reverberation rooms ISO 3743:1976Part 3:1981 Engineering methods for determination of sound power levels for sources in special reverberation test rooms ISO 3744:1981Part 4:1981 Engineering methods for determination of sound power levels for sources in free-field co
24、nditions over a reflecting planea ISO 3745:1977Part 5:1981 Precision methods for determination of sound power levels for sources in anechoic and semi-anechoic rooms a Now superseded by BS ISO 3744:1994, which is identical with ISO 3744:1994. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:
25、49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60268-5 August 1996 + A2 August 1996 UDC 621.396.7:621.395.6 ICS 17.140.50; 33.160
26、.50 Supersedes HD 483.5 S2:1994 Descriptors: Sound system equipment, loudspeaker, characteristic, specification, measuring method English version Sound system equipment Part 5: Loudspeakers (includes amendment A2:1996) (IEC 268-5:1989 + A1:1993 + A2:1996) Equipements pour systmes lectroacoustiques P
27、artie 5: Haut-parleurs (inclut lamendement A2:1996) (CEI 268-5:1989 + A1:1993 + A2:1996) Elektroakustische Gerte Teil 5: Lautsprecher (enthlt nderung A2:1996) (IEC 268-5:1989 + A1:1993 + A2:1996) This European Standard was approved by CENELEC on 1996-07-02. CENELEC members are bound to comply with t
28、he 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
29、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 offi
30、cial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnic
31、al Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 60268-5:1996 + A2:1996 E Licensed Copy: sheffieldun sheffieldun, na, Sat
32、 Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60268-5:1996 BSI 04-1999 2 Foreword The text of the International Standard IEC 268-5:1989 and its amendment 1:1993, prepared by TC 84 (transformed into SC 100C, Equipment and systems in the field of audio, video and audiovisual engineeri
33、ng, of IEC TC 100, Audio, video and multimedia systems and equipment), was approved by CENELEC as HD 483.5 S2 on 1994-07-05. This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN 60268-5 on 1996-07-02. The following dat
34、e was fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Foreword of amendment A2 The text of document 100C/2/FDIS, future amendment 2 to IEC 268-5:1989, prepared by SC 100C, Equipment and systems i
35、n 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 amendment A2 to EN 60268-5:1996 on 1996-07-02. The following dates were fixed: Contents Page Forewo
36、rd2 1Scope5 2Object5 Section 1. General 3Conditions6 3.1General conditions6 3.2Conditions for the measurement6 4Test signals6 4.1Sinusoidal signal6 4.2Broadband noise signal6 4.3Narrow band noise signal6 4.4Impulsive signal6 5Acoustical environment6 5.1Free-field conditions7 5.2Half space free-field
37、 conditions7 5.3Diffuse sound field conditions7 5.4Simulated free-field conditions7 5.5Half-space simulated free-field conditions7 6Unwanted acoustical and electrical noise7 7Positioning of loudspeaker and measuring microphone7 7.1Measuring distance under free-field and half space free-field conditi
38、ons7 7.2Positioning of loudspeaker in diffuse field conditions8 7.3Positioning of loudspeaker and microphone in simulated free-field conditions8 8Measuring equipment8 9Accuracy of acoustical measurement9 10Mounting of loudspeakers9 10.1 Mounting and acoustic loading of drive units9 10.2 Mounting and
39、 acoustic loading of a loudspeaker system9 11Standard baffle9 12Preconditioning9 Section 2. Characteristics to be specified and the relevant methods of measurement 13Type description 13.1 Loudspeaker drive units 13.2 Loudspeaker system10 14Marking of terminals and controls10 latest date by which the
40、 EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1997-04-01 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement(dop)1997-04-01 latest date by w
41、hich the national standards conflicting with the amendment have to be withdrawn(dop)1997-04-01 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60268-5:1996 BSI 04-19993 Page 15Reference plane, reference point and reference axis10 15.1 Ref
42、erence plane10 15.2 Reference point10 15.3 Reference axis10 16Impedance and derivative characteristics10 16.1 Rated impedance10 16.2 Impedance curve10 16.3 Total Q-factor (Qt)10 16.4 Equivalent air volume of a loudspeaker drive unit compliance (Vas)11 17Input voltage12 17.1 Short term maximum input
43、voltage12 17.2 Long term maximum input voltage12 17.3 Rated sinusoidal voltage12 17.4 Rated noise voltage12 18Input electrical power13 18.1 Short term maximum power13 18.2 Long term maximum power13 18.3 Rated sinusoidal power13 18.4 Rated noise power13 19Frequency characteristics13 19.1 Rated freque
44、ncy range13 19.2 Resonance frequency14 19.3 Tuning frequency of a bass reflex or passive radiator loudspeaker system14 20Sound pressure under free-field and half space free-field conditions14 20.1 Sound pressure in a stated frequency band14 20.2 Sound pressure level in a stated frequency band14 20.3
45、 Characteristic sensitivity in a stated frequency band14 20.4 Characteristic sensitivity level in a stated frequency band14 20.5 Mean sound pressure in a stated frequency band14 20.6 Mean sound pressure level in a stated frequency band15 21Response under free-field and half space free-field conditio
46、ns15 21.1 Frequency response15 21.2 Effective frequency range16 21.3 Transfer function16 Page 22Output power (acoustic power)16 22.1 Acoustic power in a frequency band16 22.2 Mean acoustic power in a frequency band17 22.3 Efficiency in a frequency band17 22.4 Mean efficiency in a frequency band17 23
47、Directional characteristics17 23.1 Directional response pattern17 23.2 Radiation angle18 23.3 Directivity index18 24Amplitude non-linearity19 24.1 Introduction19 24.2 Total harmonic distortion19 24.3 Harmonic distortion of the nth order20 24.4 Characteristic harmonic distortion21 24.5 Total noise di
48、stortion21 24.6 Noise distortion of the nth order21 24.7 Characteristic noise distortion22 24.8 Modulation distortion of the nth order22 24.9 Characteristic modulation distortion of the nth order23 24.10Difference frequency distortion23 24.11Noise intermodulation distortion23 Section 3. Other charac
49、teristics and classification 25Rated ambient conditions24 26Interfering stray field24 27Physical characteristics24 27.1 Dimensions24 27.2 Weight24 27.3 Cable assemblies24 28Design data24 29Classification of the characteristics to be specified24 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications28 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 09:49:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60268-5:1996 BSI 04-1999 4 Pag
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