The purpose of this document is to explain methods for measuring and recording machine sound levels that are most compatible with actual conditions encountered in industry, references to newer techniques in sound measurement and analysis are included. Therefore, a discussion of time-weighted average sound levels has been added (Annex B) to assist the reader in understanding the sound dosage concept embodied in the Occupational Safety and Health Administration (OSHA) regulations. Note that at this time a disagreement exists between OSHA and the Environmental Protection Agency (EPA) as to the basis for computing sound dosage. However, this document takes no position regarding the controversy; Annex B has been incorporated for reference purposes only.

Table of Contents

FOREWORD
1 SCOPE
2 REFERENCES
3 DEFINITIONS
4 MEASUREMENT
4.1 INSTRUMENTATION
4.2 CALIBRATION
4.3 SOUND LEVEL METERS
4.4 MICROPHONES
4.5 ULTRASOUND
4.6 TESTING ENVIRONMENT
4.7 AMBIENT SOUND PRESSURE LEVELS
4.8 MEASURING SOUND PRESSURE LEVELS
4.9 SOUND PARAMETERS
5 EVALUATION
5.1 MACHINERY DATA
5.2 SITE APPLICATION
6 DOCUMENTATION
6.1 MACHINE UNDER TEST
6.2 TEST CONDITIONS
6.3 ACOUSTIC ENVIRONMENT
6.4 INSTRUMENTATION
6.5 LOCATION OF SPECIFIED POSITIONS
6.6 SOUND DATA
7 REPORTING
7.1 DATA FORM
7.2 REPORTED DATA

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