AS 2012.1-1990

Table of Contents

1 -  AS 2012.1-1990 ACOUSTICS - MEASUREMENT OF AIRBORNE NOISE EMITTED BY EARTH-MOVING MACHINERY AND AGRICULTURAL TRACTORS - STATIO
4 -  PREFACE
4 -  CONTENTS
5 -  1 SCOPE
5 -  2 REFERENCED DOCUMENTS
5 -  3 DEFINITIONS
5 -  3.1 Equivalent continuous A-weighted sound pressure level (LAeq,
6 -  3.2 A-weighted sound power level (LWA )
6 -  3.3 Earth-moving machine
6 -  3.4 Agricultural tractor
6 -  4 INSTRUMENTATION
6 -  4.1 General
6 -  4.2 Frequency weighting
6 -  4.3 Time weighting
6 -  4.4 Microphone
6 -  4.5 Calibration
6 -  4.6 Field checks
6 -  5 TEST ENVIRONMENT
6 -  5.1 General
6 -  5.2 Test site surface
7 -  5.3 Air temperature
7 -  5.4 Humidity
7 -  5.5 Wind speed
7 -  5.6 Background noise
7 -  5.7 Signal devices
7 -  5.8 Personnel
7 -  6 MEASUREMENT OF EQUIVALENT CONTINUOUS A-WEIGHTED SOUND PRESSURE LEVELS
7 -  6.1 Size of measurement surface
7 -  6.2 Microphone positions on the hemispherical measurement surface
7 -  6.3 Positioning of the machine
7 -  6.4 Measurement time
7 -  6.5 Corrections for background noise
9 -  7 SETTING-UP AND OPERATION OF MACHINERY
9 -  7.1 Safety and operation
9 -  7.2 Setting-up of the machine
10 -  7.3 Machine operating condition
10 -  7.4 Machine operating sequence
10 -  8 ACOUSTICAL MEASUREMENTS AND CALCULATIONS
10 -  8.1 Equivalent continuous A-weighted sound pressure level (LAeq,
10 -  8.2 Number of measurements
10 -  8.3 Calculation of equivalent continuous A-weighted sound pressure level averaged over the measurement surface
10 -  8.4 Calculation of A-weighted sound power level
10 -  8.5 Determination of measurement result
10 -  9 INFORMATION TO BE RECORDED
10 -  9.1 Machinery under test
10 -  9.2 Acoustic environment
11 -  9.3 Instrumentation
11 -  9.4 Acoustical data
11 -  10 INFORMATION TO BE REPORTED
12 -  APPENDIX A - TEST ENVIRONMENT
12 -  A1 GENERAL
12 -  A2 PROPERTIES OF REFLECTING PLANE
12 -  A3 ENVIRONMENTAL CORRECTION FOR REFLECTING AND NON-REFLECTING SURFACES
12 -  A4 BACKGROUND NOISE
12 -  A5 METEOROLOGICAL CONDITIONS AND ALTITUDE OF TEST SITE

Abstract

Describes a method for determining the exterior noise emitted by earth-moving machinery and agricultural tractors in terms of the A-weighted sound power level while the machine is stationary.

Scope

This Standard describes a method for determining the exterior noise emitted by earth-moving machinery and agricultural tractors in terms of the A-weighted sound power level while the machine is stationary. At six positions on a hemispherical surface, the equivalent continuous A-weighted sound pressure levels are measured. The A-weighted sound power level of the machinery is calculated from the measured values. This Standard applies to the following types of machinery:
(a) Agricultural tractors.
(b) Crawlers and wheeled excavators.
(c) Crawlers and wheeled loaders.
(d) Crawlers and wheeled dozers.
(e) Backhoe loaders.
(f) Graders.
(g) Compactor/rollers.
(h) Four-wheel drive skid-steer machines.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Pending Revision indicates that as a result of the Aged Standards review process, the document needs updating. If no project proposal, meeting the quality criteria, is received within the 12 month timeframe, the document shall be withdrawn.
Pages
ISBN
Committee	AV-006
Supersedes	DR 89225 AS 2012-1977