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  • BS 4196-6(1981) : 1981

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    SOUND POWER LEVELS OF NOISE SOURCES - SURVEY METHOD FOR DETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES

    Available format(s):  Hardcopy, PDF

    Superseded date:  15-11-1996

    Language(s):  English

    Published date:  01-01-1981

    Publisher:  British Standards Institution

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

    National foreword
    Cooperating organizations
    Method
    0.1 Related International Standards
    0.2 Synopsis of ISO 3746
    0.3 Introduction
    1 Scope and field of application
    2 References
    3 Definitions
    4 Acoustic environment
    5 Instrumentation
    6 Installation and operation of source
    7 Measurement of weighted sound pressure levels
    8 Calculation of surface sound pressure level and
         sound power level
    9 Information to be recorded
    10 Information to be reported
    Annex
    A Test environment qualification procedure
    National appendix
    A Proposed amended text for clause 8
    B Proposed amended text for the annex
    Tables
    1 International Standards specifying various methods
         for determining the sound power levels of machines
         and equipment
    2 Uncertainty in determining A-weighted sound power
         level by the survey method
    3 Co-ordinates of microphone positions in terms of
         distances from centre of hemisphere along three
         mutually perpendicular axes (x, y, z)
    4 Correction for background noise
    5 Approximate values of the mean acoustic absorption
         coefficient alpha
    Figures
    1 Microphone array on the hemisphere
    2 Location of measurement positions on the
         parallelepiped
    3 Environmental correction K in decibels

    Abstract - (Show below) - (Hide below)

    Lays down a survey method for measuring the weighted sound pressure levels at prescribed microphone positions around a noise source. The A-weighted sound power level of the source is calculated from the measured values. This method may be applied in situ to sources which cannot be moved to a special test environment.

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

    Committee EPC/1
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By

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

    BS 3970-1(1990) : 1990 STERILIZING AND DISINFECTING EQUIPMENT FOR MEDICAL PRODUCTS - SPECIFICATION FOR GENERAL REQUIREMENTS
    BS 4196-2(1981) : LATEST SOUND POWER LEVELS OF NOISE SOURCES - PRECISION METHODS FOR DETERMINATION OF SOUND POWER LEVELS FOR DISCRETE FREQUENCY AND NARROW BAND SOURCES IN REVERBERATION ROOMS
    BS 6805-1(1987) : 1987 STATISTICAL METHODS FOR DETERMINING AND VERIFYING STATED NOISE EMISSION VALUES OF MACHINERY AND EQUIPMENT - GLOSSARY OF TERMS
    BS 2745-1(1993) : 1993 WASHER-DISINFECTORS FOR MEDICAL PURPOSES - SPECIFICATION FOR GENERAL REQUIREMENTS
    BS 6805-2(1987) : 1987 STATISTICAL METHODS FOR DETERMINING AND VERIFYING STATED NOISE EMISSION VALUES OF MACHINERY AND EQUIPMENT - METHOD FOR DETERMINING AND VERIFYING STATED VALUES FOR INDIVIDUAL MACHINES
    BS 7025:1988 METHOD FOR PREPARATION OF TEST CODES OF ENGINEERING GRADE FOR MEASUREMENT AT THE OPERATOR'S OR BYSTANDER'S POSITION OF NOISE EMITTED BY MACHINERY
    BS 4196-1(1981) : LATEST SOUND POWER LEVELS OF NOISE SOURCES - PRECISION METHODS FOR DETERMINATION OF SOUND POWER LEVELS FOR BROAD BAND SOURCES IN REVERBERATION ROOMS
    BS 6836(1987) : AMD 7527 SPECIFICATION FOR CENTRIFUGAL PUMPS: CLASS II
    BS 7285(1990) : 1990 METHOD FOR DESCRIBING CHARACTERISTICS OF SERVO-HYDRAULIC TEST EQUIPMENT FOR GENERATING VIBRATION
    BS 3316-2:1987 INCINERATORS - METHODS OF TEST AND CALCULATION FOR THE PERFORMANCE OF INCINERATION PLANT FOR THE DESTRUCTION OF HOSPITAL WASTE
    BS 6056(1981) : 1981 METHOD OF MEASUREMENT OF TRANSFORMER AND REACTOR SOUND LEVELS
    BS 848-2(1985) : 1985 FANS FOR GENERAL PURPOSES - METHODS OF NOISE TESTING
    BS 6805-3(1987) : 1987 STATISTICAL METHODS FOR DETERMINING AND VERIFYING STATED NOISE EMISSION VALUES OF MACHINERY AND EQUIPMENT - METHOD FOR DETERMINING AND VERIFYING STATED VALUES FOR BATCHES OF MACHINES USING A SIMPLE (TRANSITION) METHOD
    BS 6056(1991) : AMD 7960 DETERMINATION OF TRANSFORMER AND REACTOR SOUND LEVELS
    BS 6834(1987) : 1987 SPECIFICATION FOR ACTIVE ANAESTHETIC GAS SCAVENGING SYSTEMS
    BS 4196-3(1981) : LATEST SOUND POWER LEVELS OF NOISE SOURCES - ENGINEERING METHODS FOR DETERMINATION OF SOUND POWER LEVELS FOR SOURCES IN SPECIAL REVERBERATION TEST ROOMS
    BS 7120(1989) : 1989 SPECIFICATION FOR RATING AND PERFORMANCE OF AIR TO LIQUID AND LIQUID TO LIQUID CHILLING PACKAGES

    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
    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
    IEC 60225:1966 Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations
    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 60179:1973 Precision sound level meters
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