1、Quality evaluation method for the sound field of directional loudspeaker array systemBS EN 62777:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN 62777:2016. It is identical to IEC 62777:2016.Th
2、e UK participation in its preparation was entrusted to TechnicalCommittee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisi
3、ons ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 84249 8ICS 33.160.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published un
4、der the authority of theStandards Policy and Strategy Committee on 30 June 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62777:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62777 June 2016 ICS 33.160.50 English Version Quality evaluation method
5、 for the sound field of directional loudspeaker array system (IEC 62777:2016) Mthode dvaluation de la qualit du champ acoustique dun systme de haut-parleurs directionnels (IEC 62777:2016) Methode zur Ermittlung der Qualitt des Schallfeldes von Systemen aus Richtlautsprechergruppen (IEC 62777:2016) T
6、his European Standard was approved by CENELEC on 2016-03-16. 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 standard without any alteration. Up-to-date lists and bibliographical r
7、eferences concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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
8、of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former
9、 Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical
10、 Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN
11、62777:2016 E BS EN 62777:2016EN 62777:2016 2 European foreword The text of document 100/2603/FDIS, future edition 1 of IEC 62777, prepared by Technical Area 11 “Quality for audio, video and multimedia systems“, of IEC/TC 100 “Audio, video and multimedia systems and equipment“ was submitted to the IE
12、C-CENELEC parallel vote and approved by CENELEC as EN 62777:2016. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-12-16 latest date by which the national standards c
13、onflicting with the document have to be withdrawn (dow) 2019-03-16 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice
14、The text of the International Standard IEC 62777:2016 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 ISO 3743-1 NOTE Harmonized as EN ISO 3743-1. IEC ISO 3743-2
15、NOTE Harmonized as EN ISO 3743-2. BS EN 62777:2016EN 62777:2016 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for
16、 its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
17、 applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60268-1 - Sound system equipment - Part 1: General HD 483.1 S2 - IEC 60268-2 - Sound system equipment - Part 2: Expla
18、nation of general terms and calculation methods HD 483.2 S2 - IEC 60268-5 - Sound system equipment - Part 5: Loudspeakers EN 60268-5 - IEC 61672-1 - Electroacoustics - Sound level meters - Part 1: Specifications EN 61672-1 - BS EN 62777:2016 2 IEC 62777:2016 IEC 2016 CONTENTS FOREWORD . 3 INTRODUCTI
19、ON . 5 1 Scope 6 2 Normative references. 6 3 Terms and definitions 6 4 Personal acoustic zone and sound pressure level . 7 4.1 Personal acoustic zone . 7 4.2 Personal distance between listeners 8 4.3 Personal distance between a directional loudspeaker array system and a listener . 8 4.4 Average soun
20、d pressure level at a personal acoustic zone . 9 5 Personal acoustic zone index . 9 5.1 General . 9 5.2 PAZI-x 10 5.3 PAZI-y 10 5.4 PAZI-xy . 10 5.5 PAZI-xyz . 10 6 Measurement of the sound pressure level for a personal acoustic zone 10 6.1 General . 10 6.2 Characteristics to be specified . 10 6.3 M
21、ethod of measurement 11 6.3.1 Directional loudspeaker array system . 11 6.3.2 Microphone 11 6.3.3 Test signals . 11 6.3.4 Sound pressure level curves 11 6.4 Test environment condition 11 6.4.1 Temperature 11 6.4.2 Humidity 11 7 Indication of the characteristics to be specified . 11 Annex A (informat
22、ive) Example of standard specifications for a personal audio space . 13 Bibliography . 14 Figure 1 Personal acoustic zone . 8 Figure 2 Personal acoustic zone and sound pressure level . 8 Figure 3 Measuring points of the personal acoustic zone 9 Table 1 Characteristics to be specified . 12 Table A.1
23、Personal acoustic zone Dimensioned example . 13 BS EN 62777:2016IEC 62777:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ QUALITY EVALUATION METHOD FOR THE SOUND FIELD OF DIRECTIONAL LOUDSPEAKER ARRAY SYSTEMS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide
24、organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activit
25、ies, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject de
26、alt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determine
27、d by agreement between the two organizations. 2) The formal decisions or agreements of 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 IEC National Committees
28、. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they
29、 are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication an
30、d the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not respo
31、nsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical com
32、mittees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publicat
33、ions. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of pat
34、ent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62777 has been prepared by subcommittee subcommittee technical area 11: Quality for audio, video and multimedia systems, of IEC technical committee technical committee 100: Audio,
35、video and multimedia systems and equipment. The text of this standard is based on the following documents: FDIS Report on voting 100/2603/FDIS 100/2637/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. This publica
36、tion has been drafted in accordance with the ISO/IEC Directives, Part 2. BS EN 62777:2016 4 IEC 62777:2016 IEC 2016 The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data r
37、elated to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. BS EN 62777:2016IEC 62777:2016 IEC 2016 5 INTRODUCTION Directional loudspeaker array sys
38、tems provide focused sound for a person to listen alone without disturbing others. This system is convenient for consumers who want to listen to sound without earphones or headphones. This system would be widely used in consumer electronics, for example, smart phone or pad, TV, computer, navigator,
39、and game machine. The applicable area for the system could be fitness club, exhibition room, museum, shopping mall, and etc. A simple and easy concept is needed to evaluate the performance of the directional loudspeaker array system for a consumer. It will provide consumers with personalized audio s
40、pace criteria in order to compare the audio sound field quality between various electronic products that have a directional loudspeaker array system. It is important to specify the quality evaluation method for the personal audio space and the concept of personal audio space. This standard provides
41、guidelines for general test methods to evaluate the quality of directional loudspeaker array systems. BS EN 62777:2016 6 IEC 62777:2016 IEC 2016 QUALITY EVALUATION METHOD FOR THE SOUND FIELD OF DIRECTIONAL LOUDSPEAKER ARRAY SYSTEMS 1 Scope This International Standard applies to directional loudspeak
42、er array systems of any kind, and to the parts of which they are composed or which are used as auxiliaries in such systems. This standard deals with the determination of the performance of directional loudspeaker array systems, the comparison of these system types, and the determination of their pro
43、per practical application, by listing the characteristics which are useful for their specification. It specifies uniform measurement methods for these characteristics. This standard is restricted to a description of the audio space around a person and the relevant method of measurement. It does not
44、consider characteristics of loudspeakers, which are specified in IEC 60268-5. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated
45、references, the latest edition of the referenced document (including any amendments) applies. IEC 60268-1, Sound system equipment Part 1: General IEC 60268-2, Sound system equipment Part 2: Explanation of general terms and calculation methods IEC 60268-5, Sound system equipment Part 5: Loudspeakers
46、IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 personal acoustic zone PAZ acoustic space occupied by a person 3.2 personal distance distance between listeners and a dire
47、ctional loudspeaker array system 3.3 sound pressure level at a personal acoustic zone ijP sound pressure level measured at the center of the surface j of the personal acoustic zone i BS EN 62777:2016IEC 62777:2016 IEC 2016 7 3.4 average sound pressure level at a personal acoustic zone iP mean value
48、of the sound pressure levels measured at the centers of the surfaces of the personal acoustic zone i 3.5 personal acoustic zone index PAZI ratio of the average sound pressure level of the personal acoustic zone for a listener, to the total average sound pressure levels for listeners around the direc
49、tional loudspeaker array system located at a specified personal distance 3.6 personal acoustic zone index-x PAZI-x ratio of the average sound pressure level of the personal acoustic zone of a listener in front of the directional loudspeaker array system to the sum of the average sound pressure levels of listeners at the front, the front-right, and the front-left of the system 3.7 personal acoustic zone index-y PAZI-y ratio of the average sound pressure level of the personal ac
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