AS 3534-1988

1 - AS 3534-1988 ACCOUSTICS-METHODS FOR MEASUREMENT OF AIRBORNE NOISE EMITTED BY POWERED LAWNMOWERS,EDGE AND BRUSH CUTTERS AND ST
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE.
5 - 2 APPLICATION.
5 - 3 REFERENCED DOCUMENTS.
5 - 4 DEFINITIONS.
5 - 5 MEASURING EQUIPMENT.
5 - 5.1 Sound level meter.
5 - 5.2 Spectrum analysis.
5 - 6 QUANTITIES TO BE MEASURED.
5 - 6.1 General.
5 - 6.2 Spectral analysis.
5 - 6.3 Noise exposure at operator’s position.
6 - 6.4 Instrumentation for measuring the operating conditions of machines.
6 - 7 TEST ENVIRONMENT.
6 - 7.1 Test site.
6 - 7.2 Personnel position.
6 - 7.3 Test pad.
6 - 7.4 Air temperature.
6 - 7.5 Climatic conditions.
6 - 7.6 Meteorological effects.
6 - 7.7 Ambient sound levels.
6 - 8 LOCATION AND ORIENTATION OF MICROPHONE.
6 - 8.1 At the operator’s position.
6 - 8.2 Microphone positions for purpose of sound level determination.
6 - 9 SOUND MEASUREMENTS.
6 - 9.1 General.
6 - 9.2 Equipment for noise measurement at the operator position.
6 - 9.3 Measurement of sound pressure levels.
7 - 9.4 Sound level at the operator’s position.
7 - 9.5 Noise exposure at the operator’s position.
7 - 9.6 Noise level at the bystander’s position.
7 - 10 OPERATION CONDITIONS FOR MACHINES.
7 - 10.1 Selection and adjustment of mowing systems and attachments.
7 - 10.2 Preconditioning of machines.
7 - 10.3 Operation of engines.
7 - 10.4 Operation of electric motors.
7 - 10.4.1 Motors supplied from mains.
7 - 10.4.2 Motors supplied from batteries.
9 - 10.5 Operation and location of machine.
9 - 11 CALCULATIONS.
9 - 11.1 Calculation of surface sound pressure level
9 - 11.2 Calculation of sound power level
9 - 12 INFORMATION TO BE RECORDED.
9 - 12.1 General.
9 - 12.2 Purpose of measurements.
9 - 12.3 Description of the machine under test.
9 - 12.4 Supply, fuel and lubrication for operation.
9 - 12.5 Preconditioning of machine.
9 - 12.6 Operating conditions of machine.
10 - 12.7 Test site.
10 - 12.8 Instrumentation.
10 - 12.9 Acoustic data.
10 - 12.10 General data.
11 - APPENDIX A - TEST PAD AND CONSTRUCTION MATERIALS
11 - A1 GENERAL.
11 - A2 TEST PAD MATERIALS.
11 - A3 TEST PAD CONSTRUCTION.
13 - APPENDIX B - PREDICTION OF NOISE AT THE BYSTANDER’S POSITION

Specifies a method for the measurement of the sound level emitted by powered lawnmowers, including ride-on lawnmowers, and by edge and brush cutters and string trimmers, and of the noise heard at the operator's position and at a specified bystander's position. It applies to machines powered by electricity, including batteries, and by internal combustion engine. The Standard includes the method of calculation of sound power level.

This Standard describes the method for the measurement of the sound level of noise emitted by powered lawnmowers, including ride-on lawnmowers, and by edge and brush cutters and string trimmers, and of the noise heard at the operator's position and at a specified bystander's position. It applies to machines powered by electricity, including batteries, and by internal combustion engine.The Standard includes the method of calculation of sound power level.NOTE: A lawnmower, edge or brush cutter, or string trimmer may be referred to herein as a machine.

First published as AS 3534-1988.