AS 2221.1-1979

1 - AS 2221, PART 1-1979 METHODS FOR MEASUREMENT OF AIRBORNE SOUND EMITTED BY COMPRESSOR UNITS INCLUDING PRIMEMOVERS AND BY PNEU
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE.
5 - 2 APPLICATION.
5 - 3 DEFINITION.
5 - 4 INSTRUMENTATION.
5 - 4.1 Sound Level Meter.
5 - 4.2 Alternative Systems.
5 - 4.3 Spectrum Analysis.
5 - 4.4 Calibration.
5 - 5 OPERATING CONDITIONS.
5 - 5.1 Condition of Machine.
5 - 5.2 Measurement Conditions.
5 - 6 TEST ENVIRONMENT.
6 - 7 PROCEDURE FOR SOUND MEASUREMENT.
6 - 7.1 Background Sound.
6 - 7.2 Machine Sound.
6 - 8 CALCULATION OF MEAN SOUND LEVEL AND MEAN BAND PRESSURE LEVEL.
7 - 9 TEST REPORT.
8 - APPENDIX A - BEAUFORT WIND SCALE
9 - APPENDIX B - SOUND LEVEL TEST REPORT FOR COMPRESSOR

Describes a method for determining mean sound level and mean band pressure level of airborne sound. It is an engineering method which requires a controlled environment for repeatable results.

This standard describes a method for determining the mean sound level and mean band pressure level of the airborne sound emitted by compressor/ primemover units intended for outdoor use. This is an engineering method in which care is required to establish a controlled environment in order to achieve repeatable results.

First published 1979