1、 IEC 62777 Edition 1.0 2016-02 INTER NA TIONA L STA NDA R D Quality evaluation method for the sound field of directional loudspeak er array systems IEC 62777:2016-02(en)Copyright International Electrotechnical Commission THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC,Geneva,Switzerland A
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11、sound field of directional loudspeak er array systems INTER NA TIONAL ELECTROTECHNICAL COMMISSION ICS 33.160.50 ISBN 978-2-8322-3136-4 Registered t rademark of t he Int ernational Electrot echnical Commission W arning!Make sure that you obtained this publication from an authorized distributor.Copyri
12、ght International Electrotechnical Commission 2 IEC 62777:2016 IEC 2016 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative ref erences.6 3 Terms and def initions.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 Per
13、sonal distance between a directional loudspeaker array system and a listener.8 4.4 Average sound 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 f or a per
14、sonal acoustic zone.10 6.1 General.10 6.2 Characteristics to be specif ied.10 6.3 Method 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 Humidit
15、y.11 7 Indication of the characteristics to be specif ied.11 Annex A(inf ormative)Example of standard specif ications f or 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
16、acoustic zone.9 Table 1 Characteristics to be specif ied.12 Table A.1 Personal acoustic zone Dimensioned example.13 Copyright International Electrotechnical Commission IEC 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 organization for standardization comprising all national electrotechnical committees(IEC Na