Standard
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AS 1055:2018
[Current]Acoustics — Description and measurement of environmental noise
This Standard sets out general procedures for the description and measurement of environmental noise, including repetitive impulsive noise.
Published: 24/08/2018
Pages: 47
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
FOREWORD
1 SCOPE
2 NORMATIVE DOCUMENTS
3 DEFINITIONS
4 SYMBOLS
5 INSTRUMENTATION
5.1 General
5.2 Measurement of time average A-weighted sound pressure level (LAeq,T)
5.3 Measurement of percent exceedance A-weighted sound pressure level (LA%,T)
5.4 Measurement of sound exposure level (LAE)
5.5 Calibration
5.6 Field checks of calibration
6 MEASUREMENTS
6.1 General
6.2 Measurement positions
6.2.1 General
6.2.2 Outdoor measurements
6.2.3 Outdoor measurements near buildings
6.2.4 Measurements inside buildings
6.3 Meteorological conditions
6.3.1 General
6.3.2 Levels to be averaged over all relevant weather conditions
6.3.3 Levels to be determined under specified weather conditions
6.3.4 Meteorological instrumentation
6.4 Measurement procedure—Selection of measurement interval
6.5 Procedures for the determination of time average A-weighted sound pressure level (LAeq,T)
6.5.1 General
6.5.2 Steady sound
6.5.3 Non-steady sound
6.5.4 Steady sound with stepped variations of level
6.5.5 Separate sound events
6.6 Determination of rating level
6.6.1 General
6.6.2 Determination of rating level
6.7 Determination of adjusted percent exceedance A-weighted sound pressure level
6.7.1 General
6.7.2 Determination of adjusted percent exceedance A-weighted sound pressure level
6.7.3 Tonal adjustment (K1)
6.7.4 Impulse adjustment (K2)
6.8 Determination of long-term time average A-weighted sound pressure level (LAeq,LT)
7 INFORMATION TO BE RECORDED FOR GENERAL SOUND LEVEL SURVEYS
7.1 General
7.2 Measurement technique
7.3 Conditions prevailing during measurements
7.4 Qualitative data
8 INVESTIGATION OF SPECIFIC ENVIRONMENTAL NOISE SITUATIONS
8.1 General
8.2 Measurements
8.2.1 General
8.2.2 Measurement of adjusted percent exceedance A-weighted sound pressure level (LA%,adj,T), rating sound level (LAr,T) and background A-weighted sound pressure level, (LA90,T)
8.2.3 Measurement of steady noise sources
8.2.4 Measurement of rating sound level (LAr,T)
8.2.5 Measurement of percent exceedance A-weighted sound pressure level (LA%,T)
8.3 Assessment of other factors in noise annoyance
9 SPECIFICATION OF NOISE LIMITS
9.1 General
9.2 Specification of noise limits
9.2.1 Long-term time average rating level (LAr,LT) and background sound level (LA90,period,LT)
9.2.2 Locations
9.2.3 Source operation
9.2.4 Meteorological conditions
10 CHECKING COMPLIANCE WITH NOISE LIMITS
10.1 Instrumentation
10.2 Location of measurement positions
10.3 Measurement time intervals and meteorological conditions
10.4 Assessment of compliance with noise limits
10.5 Information to be recorded
11 PREDICTION OF NOISE LEVELS
12 UNCERTAINTY IN MEASUREMENTS
APPENDIX A
A1 SCOPE
A2 SPECIFICATION OF NOISE LIMIT REQUIREMENT
A2.1 General
A2.2 Long-term time interval
A2.3 Reference time interval
A2.4 Locations
A2.5 Meteorological conditions
A2.6 Source operating conditions
A2.7 Descriptor to be used
A3 CHECKING CONFORMANCE TO NOISE LIMIT REQUIREMENT
A4 INVESTIGATION OF SPECIFIC ENVIRONMENTAL NOISE SITUATIONS
A5 ACQUISITION OF DATA PERTINENT TO LAND USE
A5.1 General
A5.2 Long-term time interval
A5.3 Reference time interval
A5.4 Measurement time intervals
A5.5 Location and number of measurement positions
A5.6 Descriptor to be used
A5.7 Instrumentation and sampling technique
A5.8 Prediction of noise levels
A5.9 Information to be recorded and presentation of results
APPENDIX B
APPENDIX C
APPENDIX D
D1 INTRODUCTION
D2 FIRST METHOD FOR ASSESSING TONALITY AND ADJUSTMENT TO BE MADE
D3 SECOND METHOD FOR ASSESSING TONALITY
APPENDIX E
E1 INTRODUCTION AND BACKGROUND
E2 DEFINITIONS
E3 MEASUREMENTS
E3.1 General
E3.2 Digital recording and signal processing
E3.3 Analogue recordings
E4 PREDICTED PROMINENCE (P)
E5 ADJUSTMENT TO LAeq
E6 ACCURACY
E7 INFORMATION TO BE REPORTED
E8 WORKED EXAMPLE
E9 CARE IN THE USE OF METHODS
APPENDIX F
BIBLIOGRAPHY
Cited references in this standard
[Available Superseded]
Electroacoustics — Sound level meters, Part 1: Specifications
Content history
[Available Superseded]
[Superseded]
[Superseded]
DR AS 1055:2018
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