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BS ISO 10494:1993

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Gas turbines and gas turbine sets. Measurement of emitted airborne noise. Engineering/survey method
Available format(s)

Hardcopy , PDF

Superseded date

04-20-2018

Language(s)

English

Published date

11-14-2003

National foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Acoustic environment
5 Instrumentation
6 Object under test and test conditions
7 Sound pressure levels on the measurement surface
8 Calculation of surface pressure level, sound power
   level and directivity factor
9 Information to be recorded
10 Test report
Annex A (normative) Qualification procedures for the
        acoustic environment
Annex B (informative) Examples of suitable instrumentation
        systems
Annex C (informative) Calculation of directivity index and
        directivity factor using a hemispherical microphone
        array
Annex D (informative) Bibliography

Gives methods for measuring the sound pressure levels on a measurement surface enveloping a source, and calculating the sound power level which is produced by the source. Specifies requirements for the test environment and instrumentation. Applicable to gas turbines and gas turbine sets for industrial applications, for installation on board ships or offshore installations, road and railway vehicles.

Committee
MCE/16
DevelopmentNote
Supersedes 91/76849 DC. (11/2003) Renumbers and supersedes BS 7721(1994). 1993 version incorporates amendment 14748 to BS 7721(1994) (11/2003)
DocumentType
Standard
Pages
28
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
ISO 10494:1993 Identical

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
IEC 60942:2003 Electroacoustics - Sound calibrators
ISO 266:1997 Acoustics — Preferred frequencies
ISO 3740:2000 Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards
ISO 3746:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Survey method using an enveloping measurement surface over a reflecting plane
ISO 2314:2009 Gas turbines — Acceptance tests
IEC 60225:1966 Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations
ISO 6926:2016 Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
ISO 3977:1991 Gas turbines — Procurement
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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