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BS 7458-1:1991

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Test code for the measurement of airborne noise emitted by rotating electrical machinery Engineering method for free-field conditions over a reflecting plane
Available format(s)

Hardcopy , PDF

Superseded date

15-04-2000

Language(s)

English

Published date

28-06-1991

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Superseded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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