AS 1217.3-1985

1 - AS 1217.3-1985 ACOUSTICS - DETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES - PRECISION METHODS FOR DISCRETE-FREQUENCY A
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - SYNOPSIS
7 - SECTION 1. SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 FIELD OF APPLICATION.
7 - 1.3 REFERENCED DOCUMENTS.
7 - 1.4 MEASUREMENT UNCERTAINTY.
7 - 1.5 PRINCIPAL REQUIREMENTS.
7 - 1.6 OTHER REQUIREMENTS.
8 - SECTION 2. DETERMINATION OF THE SIGNIFICANCE OF DISCRETE-FREQUENCY COMPONENTS AND NARROW BANDS OF NOISE
8 - 2.1 GENERAL.
8 - 2.2 QUALITATIVE PROCEDURE.
8 - 2.3 ESTIMATE OF STANDARD DEVIATION.
9 - SECTION 3. NUMBER OF MICROPHONE POSITIONS AND SOURCE LOCATIONS
9 - 3.1 GENERAL.
9 - 3.2 COMPUTATIONAL PROCEDURES.
11 - APPENDIX A - ALTERNATIVE QUALIFICATION PROCEDURE FOR THE MEASUREMENT OF DISCRETE- FREQUENCY COMPONENTS
11 - A1 INTRODUCTION.
11 - A2 INSTRUMENTATION.
11 - A3 LOUDSPEAKER TEST.
11 - A4 ROOM TEST.
11 - A5 COMPUTATIONAL PROCEDURE.
13 - A6 QUALIFICATION.
13 - A7 MULTIPLE SOURCE LOCATIONS.
14 - APPENDIX B - GUIDELINES FOR THE DESIGN OF ROTATING DIFFUSER

Sets out special procedures which are necessary for accurate determinations of the sound power when discrete frequencies or narrow bands of noise are radiated by a source. Applies to sources whose spectrum may or may not include broad-band components upon which the prominent discrete frequencies of narrow bands of noise are superposed.

This standard sets out special procedures that are necessary for accurate determinations of the sound power when discrete frequencies or narrow bands of noise are radiated by a source.