BS 7458-2:1991
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Hardcopy , PDF
15-04-2000
English
28-06-1991
Committees responsible
National foreword
Method
0. Introduction
1. Scope and field of application
2. References
3. Definitions
4. Acoustic environment
5. Instrumentation
6. Installation and operation of the machine
7. Sound pressure levels on the measurement surface
8. Calculation of surface sound pressure level and
sound power level
9. Information to be recorded
10. Information to be reported
Annexes
A. Qualification procedures for the acoustic
environment
B. Method for estimating the difference in noise
level between no-load and on-load operations
Tables
1. Uncertainty in determining A-weighted sound power
level by the survey method
2. Corrections for background sound pressure levels
3. Approximate values of the mean acoustic absorption
coefficient, alpha
Figures
1. Procedures for fixing the measurement positions
where a side of the measurement surface exceeds 3d
2. Example of a measurement surface and measurement
positions (paths) for a small machine
3. Example of a measurement surface and measurement
positions (paths) for a long machine
4. Example of a measurement surface and measurement
positions (paths) for a large machine
5. Example of an arrangement for irregularly shaped
machines
6. Environmental correction, K, in decibels
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