The objective of this Standard is to specify a method for determining the emission sound pressure level of earth-moving machinery at the operator’s position, measured in terms of the time-averaged A-weighted emission sound pressure level while the machine is stationary with the engine operating at the rated speed under no-load conditions.
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Instrumentation
5 Test environment
6 Measurement of time-averaged A-weighted sound pressure levels
6.1 Operator stature
6.2 Operator presence
6.2.1 Ride-on machines
6.2.1.1 Operator’s position
6.2.1.2 Seat adjustment
6.2.2 Pedestrian-controlled machines
6.2.2.1 Operator’s position
6.2.2.2 Standing operator
6.3 Microphone
6.3.1 Microphone orientation
6.3.2 Microphone position
6.3.3 Microphone mounting
6.3.4 Microphone vibration precautions
6.3.5 Precautions against microphone-reflected noise
6.3.5.1
6.3.5.2
6.3.5.3
6.4 Positioning of the machine
6.5 Measurement time
7 Set-up and operation of machine, and operator’s position set-up
7.1 Set-up and operation of machine
7.2 Setting-up operator’s position for machines with cab
7.2.1 Cab with air-conditioning and/or pressurized ventilation system(s)
7.2.2 Cab without air-conditioning or pressurized ventilation system(s)
8 Acoustic measurements
8.1 Measurement procedure
8.2 Determination of measurement result
9 Information to be recorded
10 Information to be reported
10.1 Information
10.2 Declaration of sound emission data and uncertainty
