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  • ASHRAE 68 : 0

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

    LABORATORY METHOD OF TESTING TO DETERMINE THE SOUND POWER IN A DUCT

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    Withdrawn date:  29-02-2016

    Language(s): 

    Published date: 

    Publisher:  American Society of Heating, Refrigerating & Air Conditioning Engineers

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

    Foreword
    1 Purpose
    2 Scope
    3 Definitions and Symbols
    4 Measurement Uncertainty
    5 Test Facilities and Instrumentation
    6 Test Setup
    7 Test Procedure
    8 Calculations
    9 References
    TABLES
    1 Estimated Standard Deviations
    2 Maximum Reflection Coefficient
    3 Frequency Response Correction C2
    4 Flow Velocity Correction C3
    5 Modal Correction C4
    FIGURES
    1A Test on Fan Outlet with Open Inlet
    1B Test on Fan Outlet with Ducted Inlet
    1C Test on Fan Inlet with Open Discharge
    1D Test on Fan Inlet with Ducted Discharge
    APPENDICES
    A Estimation of Testing Accuracy
    B Anechoic Termination
    C Throttling Section Suggestions
    D Example Calculations
    E Turbulence Screen and Typical Mountings of
                   Microphone and Sampling Tube
    F Determination of the Signal-to-Noise Ratio of
                   Sound to Turbulence Noise in the Test Duct
    G Bibliography

    Abstract - (Show below) - (Hide below)

    Establishes a method of testing ducted fans to determine the sound power radiated into an anechoically terminated duct on the supply and/or return side of the equipment.

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

    Development Note Also numbered as AMCA 330 (04/2001)
    Document Type Standard
    Publisher American Society of Heating, Refrigerating & Air Conditioning Engineers
    Status Withdrawn

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASME AG-1 : 2019 CODE ON NUCLEAR AIR AND GAS TREATMENT
    ASME AG 1 : 2012 CODE ON NUCLEAR AIR AND GAS TREATMENT
    ASHRAE HDBK REFRIGERATION : 2014 ASHRAE HANDBOOK - REFRIGERATION

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

    ANSI S1.31 : 1980 BROADBAND NOISE SOURCES IN REVERBERATION ROOMS, PRECISION METHODS FOR THE DETERMINATION OF SOUND POWER LEVELS OF
    ANSI S1.32 : 1980 DISCRETE-FREQUENCY AND NARROW-BAND NOISE SOURCES IN REVERBERATION ROOMS, PRECISION METHODS FOR THE DETERMINATION OF SOUND POWER LEVELS OF,
    ANSI S1.4 : 1983 SPECIFICATION FOR SOUND LEVEL METERS
    ANSI S1.11 : 2014 SPECIFICATION FOR OCTAVE-BAND AND FRACTIONAL-OCTAVE-BAND ANALOG AND DIGITAL FILTERS
    ANSI/ASA S1.6 : 2016 PREFERRED FREQUENCIES AND FILTER BAND CENTER FREQUENCIES FOR ACOUSTICAL MEASUREMENTS
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