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  • BS 4954-2(1978) : 1978

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    METHODS FOR TESTING AND RATING INDUCTION UNITS FOR AIR DISTRIBUTION SYSTEMS - ACOUSTIC TESTING AND RATING

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-1978

    Publisher:  British Standards Institution

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

    Foreword
    Cooperating organizations
    Methods
    Section one. General
    1. Scope
    2. References
    3. Definitions
    4. Nomenclature
    5. General test requirements
    6. Test conditions
    7. Instrumentation
    8. Test methods
    9. Rating tests
    10. Correlation and extrapolation of test data
    11. Reporting of test results
    Section two. Test methods
    12. General
    13. Application
    14. Precision
    15. Instrumentation
    16. Installation
    17. Quantities to be measured
    18. Discrete frequency components
    19. Method of measurement
    20. Determination of sound power level
    21. Background noise
    Appendices
    A. Example of analysis of single point data
    B. Method of testing and rating quiet equipment
    C. Quiet air supply for acoustic testing and rating
    Tables
    1. Correction conditions for background noise
    2. Range of accuracy in determining sound power levels
        of broad band sources in reverberation rooms
    3. Bandwidths
    4. Significant discrete frequencies
    5. Number of microphone stations
    6. Standard deviations
    7. Minimum requirements for traverse path
    8. Test octave band mean sound pressure levels
    9. Test results for generated noise
    Figures
    1. End reflection correction
    2. Arrangement of equipment for insertion loss test
    3. Arrangement of equipment for generated noise test
    4. Correlation example
    5. Example of typical reference and source
    6. Extrapolation of LW data on octave bands 4, 5, 6
        and 7 below minimum measurable value of 30 dB
    7. Equipment for quiet air supply

    Abstract - (Show below) - (Hide below)

    Specifies methods of acoustic testing and rating of induction units, defined in Part 1 of the standard for sound power emission and terminal attenuation. Includes general test requirements, test conditions, instrumentation, test methods, rating tests, correlation and extrapolation of test data and test methods.

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

    Committee RHE/6
    Development Note Supersedes 76/71261 DC. (07/2005) Reviewed and confirmed by BSI, December 2012. (11/2012)
    Document Type Standard
    Publisher British Standards Institution
    Status Current

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

    ISO 2204:1979 Acoustics Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings
    BS PD5686(1978) : LATEST THE USE OF SI UNITS
    BS 4954-1(1973) : 1973 METHODS FOR TESTING AND RATING INDUCTION UNITS FOR AIR DISTRIBUTION SYSTEMS - THERMAL AND AERODYNAMIC PERFORMANCE
    BS 661(1969) : LATEST GLOSSARY OF ACOUSTICAL TERMS
    BS 4197(1967) : LATEST A PRECISION SOUND LEVEL METER
    BS 848-2(1985) : 1985 FANS FOR GENERAL PURPOSES - METHODS OF NOISE TESTING
    BS 3763(1976) : LATEST THE INTERNATIONAL SYSTEM OF UNITS (SI)
    BS 1042-1(1964) : LATEST
    BS 2475:1964 SPECIFICATION FOR OCTAVE AND ONE THIRD OCTAVE BAND PASS FILTERS
    BS 350(2004) : 2004 CONVERSION FACTORS FOR UNITS
    BS 3638(1987) : AMD 7781 METHOD FOR MEASUREMENT OF SOUND ABSORPTION IN A REVERBERATION ROOM
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