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    I.S. EN ISO 5136:2009

    Current The latest, up-to-date edition.

    ACOUSTICS - DETERMINATION OF SOUND POWER RADIATED INTO A DUCT BY FANS AND OTHER AIR-MOVING DEVICES - IN-DUCT METHOD

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-2009

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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

    Foreword
    Introduction
    1 Scope
    2 Normative references
    3 Terms, definitions and symbols
    4 Uncertainty of the measurement method
    5 Test facilities and instrumentation
    6 Test arrangement
    7 Test procedure
    8 Calculations
    9 Information to be recorded
    10 Information to be reported
    Annex A (normative) Determination of the combined mean flow
            velocity and modal correction C[3,4]
    Annex B (normative) Determination of the signal-to-noise ratio
            of sound vs. turbulent pressure fluctuation in the test
            duct
    Annex C (normative) Computational procedures for calculating the
            A-weighted sound power level from one-third-octave-band
            sound power levels
    Annex D (informative) Example of calculation of C[3,4] for a
            given duct diameter and mean flow velocity
    Annex E (informative) Guidelines for the design and construction
            of an anechoic termination
    Annex F (informative) Evaluation of performance of anechoic
            terminations
    Annex G (informative) Sampling tube information
    Annex H (informative) Test method for small ducted fans
    Annex I (informative) Test method for large ducted fans
    Annex J (informative) Measurement of the swirl component
    Bibliography
    Annex ZA (informative) Relationship between this European Standard
             and the Essential Requirements of EU Directive 98/37/EC
    Annex ZB (informative) Relationship between this European Standard
             and the Essential Requirements of EU Directive 2006/42/EC

    Abstract - (Show below) - (Hide below)

    Gives a method for testing ducted fans and other air-moving devices to determine the sound power radiated into an anechoically terminated duct on the inlet and/or outlet side of the equipment. Applicable to fans which emit steady, broad-band and discrete-frequency sound and to air temperatures between -50 degrees C and +70 degrees C.

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

    Development Note Supersedes I.S. EN 25136. (03/2006)
    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Current
    Supersedes

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

    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 3743-2:1994 Acoustics Determination of sound power levels of noise sources using sound pressure Engineering methods for small, movable sources in reverberant fields Part 2: Methods for special reverberation test rooms
    ISO 7574-4:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 4: Methods for stated values for batches of machines
    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 7574-1:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 1: General considerations and definitions
    ISO 5801:2017 Fans — Performance testing using standardized airways
    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 7574-3:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 3: Simple (transition) method for stated values for batches of machines
    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 7235:2003 Acoustics — Laboratory measurement procedures for ducted silencers and air-terminal units — Insertion loss, flow noise and total pressure loss
    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 61260:1995 Electroacoustics - Octave-band and fractional-octave-band filters
    IEC 60651:1979+AMD1:1993+AMD2:2000 CSV Sound level meters
    ISO 3743-1:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for small movable sources in reverberant fields Part 1: Comparison method for a hard-walled test room
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