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  • BS ISO 10494:1993

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Gas turbines and gas turbine sets. Measurement of emitted airborne noise. Engineering/survey method

    Available format(s):  Hardcopy, PDF

    Superseded date:  20-04-2018

    Language(s):  English

    Published date:  14-11-2003

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    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

    Abstract - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Committee MCE/16
    Development Note Supersedes 91/76849 DC. (11/2003) Renumbers and supersedes BS 7721(1994). 1993 version incorporates amendment 14748 to BS 7721(1994) (11/2003)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    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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