IEC IEC 62777 Edition 1.0 2016-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Quality evaluation method for the sound field of directional loudspeaker array systems Methode d'évaluation de la qualite du champ acoustique des systemes de haut-parleurs directionnels IEC 62777:2016-02(en-fr) IEC IEC 62777 Edition 1.0 2016-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Quality evaluation method for the sound field of directional loudspeaker array systems Methode d'évaluationde la qualite du champ acoustique des systemes de haut-parleurs directionnels INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 33.160.50 ISBN 978-2-8322-1029-8 Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agree. Registered trade rk of the Intermational Electrotechnical Con Marque deposee de la Con ission Electrotechnique Internationale -2 IEC62777:2016IEC2016 CONTENTS FOREWORD. INTRODUCTION 1 Scope.. 2 Normative references 3 Terms and definitions ... 4 Personal acoustic zone and sound pressure level. 4.1 Personal acoustic zone.. 4.2 Personal distance between listeners. .8 4.3 Personal distancebetweena directional loudspeakerarray system and a listener...... 8 4.4 Averagesoundpressurelevelatapersonal acousticzone 9 5 Personal acoustic zone index . 5.1 General. 5.2 PAZI-x .. 5.3 PAZl-y 5.4 PAZI-xy. 5.5 PAZI-xyz 10 6 Measurement of the sound pressure level for a personal acoustic zone 10 6.1 General. 6.2 Characteristics to be specified. 6.3 Method of measurement, 6.3.1 Directional loudspeaker array system. 6.3.2 Microphone.... 11 6.3.3 Test signals .... 6.3.4 Sound pressure level curves... 6.4 Test environment condition.. 6.4.1 Temperature... 6.4.2 Humidity ... 11 7 Indication of the characteristics to be specified.. 11 Annex A(informative) Example of standard specifications for a personal audio space.. Bibliography.. 14 Figure 1-Personal acoustic zone. .8 Figure2-Personal acousticzoneand sound pressure level. .8 Figure 3 - Measuring points of the personal acoustic zone. Table 1-Characteristics to be specified.. Table A.1 - Personal acoustic zone - Dimensioned example.