1、 IEC 61305-5 Edition 1.0 2003-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Household high-fidelity audio equipment and systems Methods of measuring and specifying the performance Part 5: Loudspeakers Equipements et systmes audio grand public haute fidlit Mthodes pour mesurer et spcifier les perfor
2、mances Partie 5: Haut-parleurs IEC 61305-5:2003 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2003 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including
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16、5-5 Edition 1.0 2003-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Household high-fidelity audio equipment and systems Methods of measuring and specifying the performance Part 5: Loudspeakers Equipements et systmes audio grand public haute fidlit Mthodes pour mesurer et spcifier les performances Pa
17、rtie 5: Haut-parleurs INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE E ICS 33.160.50 PRICE CODE CODE PRIX ISBN 978-2-8322 0776-5 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale W
18、arning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61305-5 IEC:2003 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HOUSEHOLD HIGH-FIDELITY AUDIO EQUIPMENT AND SYSTEMS MET
19、HODS OF MEASURING AND SPECIFYING THE PERFORMANCE Part 5: Loudspeakers FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote int
20、ernational co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in th
21、e subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with cond
22、itions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested Nat
23、ional Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international un
24、ification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latte
25、r. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of pa
26、tent rights. The IEC shall not be held responsible for identifying any or all such patent rights. national Standard IEC 61305-5 has been prepared by IEC technical committee 100: Audio, video and multimedia systems and equipment. This bilingual version (2013-07) corresponds to the monolingual English
27、 version, published in 2003-05. The text of this standard is based on the following documents: FDIS Report on voting 100/651/FDIS 100/678/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. The French version of this
28、 standard has not been voted upon. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. IEC 61305 consists of the following parts under the general title Household high-fidelity audio equipment and systems Methods of measuring and specifying the performance: Part 1: G
29、eneral Part 2: FM radio tuners Part 3: Amplifiers 61305-5 IEC:2003 3 Part 5: Loudspeakers This standard is Part 5 of IEC 61305 and specifies methods of measuring and specifying the performance of loudspeakers. Part 1 specifies general assumptions to be used to determine the characteristics of the eq
30、uipment or system for specification purposes. Part 2 applies to household high-fidelity radio tuners. Part 3 applies to household high-fidelity amplifiers. The committee has decided that the contents of this publication will remain unchanged until 2010. At this date, the publication will be reconfir
31、med; withdrawn; replaced by a revised edition, or amended. 4 61305-5 IEC:2003 HOUSEHOLD HIGH-FIDELITY AUDIO EQUIPMENT AND SYSTEMS METHODS OF MEASURING AND SPECIFYING THE PERFORMANCE Part 5: Loudspeakers 1 Scope This part of IEC 61305 specifies methods of measuring and specifying the performance of l
32、oudspeakers. It applies to sound-system loudspeakers for household high-fidelity audio equipment. 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
33、 edition of the referenced document (including any amendments) applies. IEC 60268-5, Sound system equipment Part 5: Loudspeakers 1IEC 61305-1, Household high-fidelity audio equipment and systems Methods of measuring and specifying the performance Part 1: General 3 General requirement Characteristics
34、 not otherwise specified more explicitly in this standard shall be in accordance with IEC 60268-5. 4 Conditions for measurement The electrical conditions shall be those specified in IEC 60268-5. The climatic conditions shall be those specified in IEC 61305-1. 5 Test signals and acoustical environmen
35、t The test signals and the acoustical environment shall be those specified in IEC 60268-5. 6 Methods of measurement The characteristics to be specified and the methods of measurement shall be as given in Table 1. _ 1To be published. 61305-5 IEC:2003 5 6 Contents of specifications 6.1 Loudspeaker dat
36、a to be specified in a document available to the user The specifications shall contain at least information on the characteristics given in Table 1, item numbers 1, 2, and 4 to 9. 6.2 Loudspeaker data to be labelled on the loudspeaker The specifications shall contain at least information on the char
37、acteristics given in Table 1, item numbers 2, 7, 8 and 9. Table 1 Contents of specifications Characteristics to be specified Definitions Methods of measurement 1. Frequency response under free- field conditions Sound pressure level as a function of frequency, measured under free-field conditions In
38、accordance with IEC 60268-5: 2003, 21.1.2, paragraph 3 2. Effective frequency range Frequency range as the range over which the response does not vary by more than 10 dB The effective frequency range can be obtained from the frequency response defined in IEC 60268-5: 2003, 21.2.1 3. Frequency respon
39、se of acoustic power Sound power level in 1/3-octave bands as a function of frequency In accordance with IEC 60268-5: 2003, 22.1.2 4. Difference of frequency responses Difference of sound pressure level of loudspeakers, which will be used in pair mode In accordance with IEC 60268-5: 2003, 21.1.2, pa
40、ragraph 3. The differences in sound pressure level are measured in the effective frequency range defined in IEC 60268-5:2003, 21.2.1 5. Characteristic sensitivity level Characteristic sensitivity level measured in the effective frequency range In accordance with Table 1, number 2. In accordance with
41、 IEC 60268-5: 2003, 20.4. 6. Maximum sound pressure level limited by distortion Sound pressure level p(f 1 ) measured at the point where the maximum value of either d tor d 2or d 3is equal to 10 % where d t is the total harmonic distortion; d 2is the intermodulation distortion of the 2ndharmonic; an
42、d d 3is the intermodulation distortion of the 3rd harmonic Harmonic distortion d tis measured according to IEC 60268-5:2003, 24.2, referred to f 1Intermodulation distortion d 2and d 3are measured In accordance with IEC 60268-5:2003, 24.5 The frequency f 1shall be equal to the lower limit of the effe
43、ctive frequency range defined in item 2 of Table 1. The frequency f 2is given by f 2= 8,5 f 17. Rated impedance Value of a pure resistance substituting the loudspeaker In accordance with IEC 60268-5: 2003, 16.1 and 16.2.2 8. Rated noise power Electrical power, calculated by U n 2 /R. U nis the rated
44、 noise voltage, R is the rated impedance In accordance with IEC 60268-5: 2003, 18.1 9. Rated sinusoidal power Electrical power, calculated by U s 2 /R. U sis the rated sinusoidal voltage, R is the rated impedance In accordance with IEC 60268-5: 2003, 18.4 _ 6 61305-5 CEI:2003 COMMISSION LECTROTECHNI
45、QUE INTERNATIONALE _ QUIPEMENTS ET SYSTMES AUDIO GRAND PUBLIC HAUTE FIDLIT MTHODES POUR MESURER ET SPCIFIER LES PERFORMANCES Partie 5: Haut-parleurs AVANT-PROPOS 1) La CEI (Commission lectrotechnique Internationale) est une organisation mondiale de normalisation compose de lensemble des comits lectr
46、otechniques nationaux (Comits nationaux de la CEI). La CEI a pour objet de favoriser la coopration internationale pour toutes les questions de normalisation dans les domaines de llectricit et de llectronique. A cet effet, la CEI, entre autres activits, publie des Normes Internationales. Leur laborat
47、ion est confie des comits dtudes, aux travaux desquels tout Comit national intress par le sujet trait peut participer. Les organisations internationales, gouvernementales et non gouvernementales, en liaison avec la CEI, participent galement aux travaux. La CEI collabore troitement avec lOrganisation
48、 Internationale de Normalisation (ISO), selon des conditions fixes par accord entre les deux organisations. 2) Les dcisions ou accords officiels de la CEI concernant les questions techniques reprsentent, dans la mesure du possible, un accord international sur les sujets tudis, tant donn que les Comi
49、ts nationaux intresss sont reprsents dans chaque comit dtudes. 3) Les documents produits se prsentent sous la forme de recommandations internationales. Ils sont publis comme normes, spcifications techniques, rapports techniques ou guides et agrs comme tels par les Comits nationaux. 4) Dans le but dencourager lunification internationa
