ANSI S12.18 : 1994
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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PROCEDURES FOR OUTDOOR MEASUREMENT OF SOUND PRESSURE LEVEL
Hardcopy , PDF
09-05-2023
English
01-01-2009
Foreword
0 Introduction
1 Scope, purpose and applications
2 References to other standards
3 Definitions
4 Environmental requirements
4.1 General
4.2 Factors influencing sound pressure level measurements
4.3 Outdoor measurement of sound pressure level
4.4 METHOD #1: General method for routine measurements
4.5 METHOD #2: Precision method for accurate measurement
4.6 Terrain equivalence
4.7 Ground equivalence
5 Acoustical environment
5.1 Types of measurements
5.2 Classification of the sound source
6 Instruments for measuring sound pressure level outdoors
6.1 Sound level meter/analyser
6.2 Microphone
6.3 Calibration
6.4 Tape recorder
6.5 Miscellaneous
6.6 Configuration of measuring system
6.7 Wind speed and direction
6.8 Temperature sensor
7 Measurement
7.1 Premeasurement planning
7.2 Sound descriptor
7.3 Source configuration and operation
7.4 Duration or sample size
7.5 Data collection
8 Data reduction
8.1 Corrections
8.2 Experimental error
9 Reporting
9.1 Introductory information
9.2 Site sketches
9.3 Characterisation of the source
9.4 Documentation of the instrumentation
9.5 Meteorological data
9.6 Acoustical data
9.7 Other observations
Annex
A - Propagation of sound outdoors
A.1 Geometrical divergence
A.2 Atmospheric absorption
A.3 Effects of the environment
A.4 Miscellaneous attenuation
A.5 Discussion
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