BS 7458-1:1991
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Test code for the measurement of airborne noise emitted by rotating electrical machinery Engineering method for free-field conditions over a reflecting plane
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. Definition
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. Procedures for calculating A-weighted sound power
level from octave or one-third octave band power
levels
C. Method for estimating the difference in noise
level between no-load and on-load operations
Tables
1. Uncertainty in determining sound power levels for
engineering measurements indoors or outdoors
2. Corrections for background sound pressure levels
3. Parameters for calculating A-weighted sound power
level from octave band power levels
4. Parameters for calculating A-weighted sound power
level from one-third octave band power levels
Figures
1. Procedure 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. Environmental correction, K, in decibels
Method, of engineering grade accuracy, of measuring sound pressure levels around a machine, of calculating band power levels and of determining the A-weighted sound power level.
| Committee |
EH/1
|
| DocumentType |
Standard
|
| Pages |
28
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| ISO 1680-1:1986 | Identical |
| BS 7458-2:1991 | Test code for the measurement of airborne noise emitted by rotating electrical machinery Survey method |
| ISO 3742:1988 | Acoustics — Determination of sound power levels of noise sources — Precision methods for discrete-frequency and narrow-band sources in reverberation rooms |
| ISO 2204:1979 | Acoustics Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings |
| ISO 3744:2010 | Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane |
| ISO 354:2003 | Acoustics — Measurement of sound absorption in a reverberation room |
| BS 4196-4:1981 | Sound power levels of noise sources Engineering methods for determination of sound power levels for sources in free-field conditions over a reflecting plane |
| ISO 266:1997 | Acoustics — Preferred frequencies |
| 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 |
| BS 4196-2:1991 | Sound power levels of noise sources Precision methods for determination of sound power levels for discrete-frequency and narrow-band sources in reverberation rooms |
| ISO 3740:2000 | Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards |
| BS 7458-2:1991 | Test code for the measurement of airborne noise emitted by rotating electrical machinery Survey method |
| 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 |
| IEC 60225:1966 | Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations |
| ISO 1680-2:1986 | Acoustics Test code for the measurement of airborne noise emitted by rotating electrical machinery Part 2: Survey method |
| 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 3741:2010 | Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for reverberation test rooms |
| 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 |
| IEC 60651:1979+AMD1:1993+AMD2:2000 CSV | Sound level meters |
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