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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
Test code for the measurement of airborne noise emitted by rotating electrical machinery Survey method
Hardcopy , PDF
15-04-2000
English
28-06-1991
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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
Method, of survey grade accuracy, of measuring sound pressure levels around a machine and of determining the A-weighted sound power level.
| Committee |
EH/1
|
| DocumentType |
Standard
|
| Pages |
24
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| ISO 1680-2:1986 | Identical |
| BS 7458-1:1991 | Test code for the measurement of airborne noise emitted by rotating electrical machinery Engineering method for free-field conditions over a reflecting plane |
| ISO 354:2003 | Acoustics — Measurement of sound absorption in a reverberation room |
| BS 4196-0:1981 | Sound power levels of noise sources Guide for the use of basic standards and for the preparation of noise test codes |
| ISO 3740:2000 | Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards |
| BS 4196-8:1991 | Sound power levels of noise sources Specification for the performance and calibration of reference sound sources |
| BS 4196-5:1981 | Sound power levels of noise sources Precision methods for determination of sound power levels for sources in anechoic and semi-anechoic rooms |
| ISO 6926:2016 | Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels |
| IEC 60034-1:2017 | Rotating electrical machines - Part 1: Rating and performance |
| ISO 3745:2012 | Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms |
| ISO 1680-1:1986 | Acoustics Test code for the measurement of airborne noise emitted by rotating electrical machinery Part 1: Engineering method for free-field conditions over a reflecting plane |
| IEC 60651:1979+AMD1:1993+AMD2:2000 CSV | Sound level meters |
| BS 7458-1:1991 | Test code for the measurement of airborne noise emitted by rotating electrical machinery Engineering method for free-field conditions over a reflecting plane |
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