1、BRITISH STANDARDBS EN 60268-5:2003Sound system equipmentPart 5: LoudspeakersICS 33.160.50g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58+A1:2009Nat
2、ional forewordThis British Standard is the UK implementation of EN 60268-5:2003+A1:2009. It is identical to IEC 60268-5:2003, incorporating amendment 1:2007. It supersedes BS EN 60268-5:2003,which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text b
3、y tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organiz
4、ations represented on this committee can be obtained on request to its secretary.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 cannot confer immunity from legal obligations
5、.BS EN 60268-5:2003+A1:2009This British Standard was published under the authority of the Standards Policy and Strategy Committee on31 July 2003 BSI 2011Amendments/corrigenda issued since publicationDate Comments 30 September 2011 Implementation of IEC amendment 1:2007 with CENELEC endorsement A1:20
6、09ISBN 2 8318 9210 4EUROPEAN STANDARD EN 60268-5:2003+A1 NORME EUROPENNE EUROPISCHE NORM July 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35,
7、 B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60268-5:2003 E ICS 33.160.50 Supersedes EN 60268-5:1996 + A2:1996English version Sound system equipment Part 5: Loudspeakers (IEC 60268-5:2003) Equipements po
8、ur systmes lectroacoustiques Part 5: Haut-parleurs (CEI 60268-5:2003) Elektroakustische Gerte Teil 5: Lautsprecher (IEC 60268-5:2003) This European Standard was approved by CENELEC on 2003-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condit
9、ions 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 European Standard exists in thr
10、ee 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 the national electrotechnic
11、al committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 100/648/FDIS, future edition 3 of I
12、EC 60268-5, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60268-5 on 2003-06-01. This European Standard supersedes EN 60268-5:1996 + A2:1996. This standard is to be used in conjunction with
13、HD 483.1 S2:1989, HD 483.2 S2:1993 and ISO 3741:1999. The following dates were 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) 2004-03-01 latest date by which the national standards conflicting with t
14、he EN have to be withdrawn (dow) 2006-06-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A, B and C are informative. Annex ZA has been added by CENELEC. _ Endo
15、rsement notice The text of the International Standard IEC 60268-5:2003 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: ISO 3743-1 NOTE Harmonized as EN ISO 3743-1:199
16、5 (not modified). ISO 3743-2 NOTE Harmonized as EN ISO 3743-2:1996 (not modified). _ Page 2Foreword to amendment A1 The text of document 100/1189/CDV, future amendment 1 to IEC 60268-5:2003, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC p
17、arallel vote and was approved by CENELEC as amendment A1 to EN 60268-5:2003 on 2009-07-01. The following dates were fixed: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-04-01 latest date by whi
18、ch the national standards conflicting with the amendment have to be withdrawn (dow) 2012-07-01 _ Endorsement notice The text of amendment 1:2007 to the International Standard IEC 60268-5:2003 was approved by CENELEC as an amendment to the European Standard without any modification. _ BS EN 60268-5:2
19、003+A1:2009EN 60268-5:2003+A1:2009 (E)CONTENTS 1 Scope.6 2 Normative references .6 3 Conditions for measurement.7 3.1 General conditions 7 3.2 Measuring conditions 7 4 Test signals8 4.1 General .8 4.2 Sinusoidal signal .8 4.3 Broadband noise signal .8 4.4 Narrow-band noise signal8 4.5 Impulsive sign
20、al 8 5 Acoustical environment 8 5.1 General .8 5.2 Free-field conditions8 5.3 Half-space free-field conditions .9 5.4 Diffuse sound field conditions9 5.5 Simulated free-field conditions 9 5.6 Half-space simulated free-field conditions .9 6 Unwanted acoustical and electrical noise .9 7 Positioning of
21、 loudspeaker and measuring microphone.10 7.1 Measuring distance under free-field and half-space free-field conditions .10 7.2 Positioning of loudspeaker in diffuse field conditions .10 7.3 Positioning of loudspeaker and microphone in simulated free-field conditions .10 8 Measuring equipment .11 9 Ac
22、curacy of the acoustical measurement11 10 Mounting of loudspeakers.11 10.1 Mounting and acoustic loading of drive units .11 10.2 Mounting and acoustic loading of a loudspeaker system11 11 Standard baffle and measuring enclosures .11 11.1 Standard baffle11 11.2 Standard measuring enclosures 12 12 Pre
23、conditioning 13 13 Type description.13 13.1 General .13 13.2 Loudspeaker drive units 13 13.3 Loudspeaker system .13 14 Marking of terminals and controls .13 15 Reference plane, reference point and reference axis 13 15.1 Reference plane characteristic to be specified13 15.2 Reference point characteri
24、stic to be specified.14 Page 3BS EN 60268-5:2003+A1:2009EN 60268-5:2003+A1:2009 (E)14.1 General .1314.2 Positive terminal.1315.3 Reference axis characteristic to be specified14 16.3 Total Q-factor (Qt) .14 16.4 Equivalent air volume of a loudspeaker drive unit compliance (Vas).16 17 Input voltage 17
25、 17.1 Rated noise voltage.17 17.2 Short-term maximum input voltage 18 17.3 Long-term maximum input voltage.18 17.4 Rated sinusoidal voltage .19 18 Input electrical power .19 18.1 Rated noise power characteristic to be specified 19 18.2 Short-term maximum power characteristic to be specified 19 18.3
26、Long-term maximum power characteristic to be specified .19 18.4 Rated sinusoidal power characteristic to be specified .19 19 Frequency characteristics.20 19.1 Rated frequency range characteristic to be specified20 19.2 Resonance frequency20 19.3 Tuning frequency of a bass reflex or passive radiator
27、loudspeaker system characteristic to be specified .20 20 Sound pressure under free-field and half-space free-field conditions 20 20.1 Sound pressure in a stated frequency band.20 20.2 Sound pressure level in a stated frequency band characteristic to be specified.21 20.3 Characteristic sensitivity in
28、 a stated frequency band .21 20.4 Characteristic sensitivity level in a stated frequency band characteristic to be specified.21 20.5 Mean sound pressure in a stated frequency band21 20.6 Mean sound pressure level in a stated frequency band characteristic to be specified .22 21 Response under free-fi
29、eld and half-space free-field conditions .22 21.1 Frequency response22 21.2 Effective frequency range23 21.3 Transfer function .23 22 Output power (acoustic power) .24 22.1 Acoustic power in a frequency band 24 22.2 Mean acoustic power in a frequency band .25 22.3 Efficiency in a frequency band.26 2
30、2.4 Mean efficiency in a frequency band26 23 Directional characteristics 26 23.1 Directional response pattern26 23.2 Radiation angle .27 23.3 Directivity index.27 23.4 Coverage angle or angles28 24 Amplitude non-linearity.29 24.1 Total harmonic distortion .29 24.2 Harmonic distortion of the nthorder
31、 (where n = 2 or n = 3).31 24.3 Characteristic harmonic distortion .32 Page 4BS EN 60268-5:2003+A1:2009EN 60268-5:2003+A1:2009 (E)16 Impedance and derivative characteristics .14 16.1 Rated impedance characteristic to be specified 14 16.2 Impedance curve.14 25.1 Temperature ranges 34 25.2 Humidity ra
32、nges 34 26 Stray magnetic fields 35 26.1 Static components.35 26.2 Dynamic components 35 27 Physical characteristics 36 27.1 Dimensions .36 27.2 Mass .36 27.3 Cable assemblies 36 28 Design data 37 29 Indication of the characteristics to be specified.37 Annex A (informative) Standard measuring enclos
33、ure type A 43 Annex B (informative) Standard measuring enclosure type B 45 Annex C (informative) Definitions of terms used in Clause 13 48 Annex ZA (normative) Normative references to international publications with their corresponding European publications .51 Bibliography53 Figure 1 Impedance curv
34、e of loudspeaker15 Figure 2 Standard baffle, dimensions39 Figure 3 Standard baffle with chamfer40 Figure 4 Standard baffle with sub-baffle.40 Figure 5 Standard measuring enclosure type A41 Figure 6 Standard measuring enclosure type B41 Figure 7 Block diagram of test set-up.42 Figure 8 Measuring appa
35、ratus for stray magnetic field .42 Figure A.1 An example of standard measuring enclosure type A 43 Figure A.2 The correction curve for the diffraction effect of the standard measuring enclosure from free-field to half-space free-field .44 Figure A.3 The correction curve for the diffraction effect of
36、 a standard measuring enclosure from free-field to half-space free-field .44 Figure B.1 An example of standard measuring enclosure type B 45 Figure B.2 Construction of scalable measuring enclosure type B .46 Figure B.3 The correction curve for the diffraction effect of the standard measuring enclosu
37、re from free-field to half-space free-field .47 Figure B.4 The correction curve for the diffraction effect of the standard measuring enclosure from free-field to half-space free-field .47 Table 1 Indication of the characteristics to be specified .38 Table B.1 Dimensions and ratios of scalable measur
38、ing enclosure type B46 Page 5BS EN 60268-5:2003+A1:2009EN 60268-5:2003+A1:2009 (E)Annex D (informative) Listening tests 50 24.4 Modulation distortion of the nthorder (where n = 2 or n = 3).32 24.5 Characteristic modulation distortion of the nthorder (where n = 2 or n = 3) 33 24.6 Difference frequenc
39、y distortion (of the second order only) .33 25 Rated ambient conditions .34 SOUND SYSTEM EQUIPMENT Part 5: Loudspeakers 1 Scope This standard applies to sound system loudspeakers, treated entirely as passive elements. Loudspeakers with built-in amplifiers are excluded. NOTE 1 The term “loudspeaker”
40、used in this standard relates to loudspeaker drive units themselves and also to loudspeaker systems, which comprise one or more loudspeaker drive units provided with a baffle, enclosure or horn and such relevant devices as built-in crossover filters, transformers and any other passive element. The p
41、urpose of this standard is to give the characteristics to be specified and the relevant methods of measurement for loudspeakers using sinusoidal or specified noise or impulsive signals. NOTE 2 The methods of measurement given in this standard have been chosen for their appropriateness to the charact
42、eristics. NOTE 3 If equivalent results can be obtained using other methods of measurement, details of the methods used should be presented with the results. NOTE 4 The following items are under consideration: loudspeakers with built-in amplifiers; measurements under conditions other than free-field,
43、 half-space free-field and diffuse field; measurements with signals other than sinusoidal or noise or impulsive signals. 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
44、 references, the latest edition of the referenced document (including any amendments) applies. IEC 60050(151), International Electrotechnical Vocabulary (IEV) Part 151: Electrical and magnetic devices IEC 60263, Scales and sizes for plotting frequency characteristics and polar diagrams IEC 60268-1,
45、Sound system equipment Part 1: General IEC 60268-2, Sound system equipment Part 2: Explanation of general terms and calculation methods IEC 60268-3, Sound system equipment Part 3: Amplifiers IEC 60268-11, Sound system equipment Part 11: Application of connectors for the interconnection of sound syst
46、em components IEC 60268-12, Sound system equipment Part 12: Application of connectors for broadcast and similar use IEC 60268-14, Part 14: Circular and elliptical loudspeakers; outer frame diameters and mounting dimensions IEC 60651, Sound level meters IEC 61260, Electroacoustics Octave-band and fra
47、ctional-octave-band filters Page 6BS EN 60268-5:2003+A1:2009EN 60268-5:2003+A1:2009 (E)ISO 3741, Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods for reverberation rooms ISO 3744, Acoustics Determination of sound power levels of noise sources usin
48、g sound pressure Engineering method in an essentially free field over a reflecting plane ISO 3745, Acoustics Determination of sound power levels of noise sources Precision methods for anechoic and semi-anechoic rooms 3 Conditions for measurement 3.1 General conditions This standard is to be used in
49、conjunction with IEC 60268-1, IEC 60268-2 and ISO 3741. 3.2 Measuring conditions 3.2.1 General For convenience in specifying how loudspeakers are to be set up for measurement, normal measuring conditions are defined in this standard. To obtain the correct conditions for measurement, some values (known as “rated conditions”) shall be taken from the manufacturers specification. These values themselves are not subject to measurement but they constitute
