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  • BS 4196-4:1981

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Sound power levels of noise sources Engineering methods for determination of sound power levels for sources in free-field conditions over a reflecting plane

    Available format(s):  Hardcopy, PDF

    Superseded date:  15-10-1994

    Language(s):  English

    Published date:  30-11-1981

    Publisher:  British Standards Institution

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    Abstract - (Show below) - (Hide below)

    Explains engineering methods for measuring the sound pressure levels on a measurement surface enveloping the source and for calculating the sound power level produced by the source. Gives requirements for the test environment and instrumentation as well as techniques for obtaining the surface sound pressure level from which the A-weighted sound power level of the source and octave or one-third octave band sound power levels are calculated. This is concerned with specification of the basic acoustic requirements for the measurement of noise under free-field conditions over a reflecting plane. It is important that specific test codes for various types of equipment be established and used as the basis for measurements.

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

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    Status Superseded
    Superseded By

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

    BS 5944-3:1980 Measurement of airborne noise from hydraulic fluid power systems and components Guide to the application of Part 1 and Part 2
    BS 4196-2:1981 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 5944-5:1985 Measurement of airborne noise from hydraulic fluid power systems and components Simplified method of determining sound power levels from pumps using an anechoic chamber
    BS 5944-6:1992 Measurement of airborne noise from hydraulic fluid power systems and components Method of test for pumps using a parallelepiped microphone array
    BS 6140-1:1981 Test equipment for generating vibration Methods of describing characteristics of electrodynamic test equipment for generating vibration
    BS 6686-2.4(1991) : 1991 METHODS FOR DETERMINATION OF AIRBORNE ACOUSTICAL NOISE EMITTED BY HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - PARTICULAR REQUIREMENTS - WASHING MACHINES AND SPIN EXTRACTORS
    BS 6686-2.3(1991) : 1991 METHODS FOR DETERMINATION OF AIRBORNE ACOUSTICAL NOISE EMITTED BY HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - PARTICULAR REQUIREMENTS - DISHWASHERS
    BS 4272-3:1989 Anaesthetic and analgesic machines Specification for continuous flow anaesthetic machines
    BS 7120:1989 Specification for rating and performance of air to liquid and liquid to liquid chilling packages
    BS 6805-2:1987 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 5944-4:1984 Measurement of airborne noise from hydraulic fluid power systems and components Method of determining sound power levels from valves controlling flow and pressure
    BS 4196-1:1981 Sound power levels of noise sources Precision methods for determination of sound power levels for broad-band sources in reverberation rooms
    BS 5724-2.24(1989) : 1989 MEDICAL ELECTRICAL EQUIPMENT - PARTICULAR REQUIREMENTS FOR SAFETY - SPECIFICATION FOR HUMIDIFIERS
    BS 6686-2.2(1990) : 1990 METHODS FOR DETERMINATION OF AIRBORNE ACOUSTICAL NOISE EMITTED BY HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - PARTICULAR REQUIREMENTS - FORCED DRAUGHT CONVECTION HEATERS
    BS 1571-1:1987 Specification for testing of positive displacement compressors and exhausters Methods for acceptance testing
    BS 848-2:1985 Fans for general purposes Methods of noise testing
    BS 5944-1:1992 Measurement of airborne noise from hydraulic fluid power systems and components Method of test for pumps
    BS 5944-2:1992 Measurement of airborne noise from hydraulic fluid power systems and components Method of test for motors
    BS 6836(1987) : AMD 7527 SPECIFICATION FOR CENTRIFUGAL PUMPS: CLASS II
    BS 7458-1:1991 Test code for the measurement of airborne noise emitted by rotating electrical machinery Engineering method for free-field conditions over a reflecting plane
    BS 6686-2.5(1991) : 1991 METHODS FOR DETERMINATION OF AIRBORNE ACOUSTICAL NOISE EMITTED BY HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - PARTICULAR REQUIREMENTS - ROOM HEATERS OF THE STORAGE TYPE
    BS 4196-3:1981 Sound power levels of noise sources Engineering methods for determination of sound power levels for sources in special reverberation test rooms
    BS 5944-2:1980 Measurement of airborne noise from hydraulic fluid power systems and components Method of test for motors
    BS 5724-2.23(1986) : LATEST MEDICAL ELECTRICAL EQUIPMENT - PARTICULAR REQUIREMENTS FOR SAFETY - SPECIFICATION FOR OXYGEN CONCENTRATORS FOR HOSPITAL AND DOMICILIARY USE
    BS 7135-1:1989 Noise emitted by computer and business equipment Method of measurement of airborne noise
    BS 6805-3:1987 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 6840-5:1990 Sound system equipment Methods for specifying and measuring the characteristics of loudspeakers
    BS 5944-1:1980 Measurement of airborne noise from hydraulic fluid power systems and components Method of test for pumps
    BS 6805-1:1987 Statistical methods for determining and verifying stated noise emission values of machinery and equipment Glossary of terms
    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 6805-4:1987 Statistical methods for determining and verifying stated noise emission values of machinery and equipment Methods for determining and verifying stated values for batches of machines
    BS 5793-8.1:1986 Industrial-process control valves. Noise considerations Method for laboratory measurement of noise generated by aerodynamic flow through control valves
    BS 5724-2.28(1990) : 1990 MEDICAL ELECTRICAL EQUIPMENT - PARTICULAR REQUIREMENTS FOR SAFETY - SPECIFICATION FOR SUCTION EQUIPMENT
    BS 5793-8.2(1991) : 1991 AMD 7819 INDUSTRIAL-PROCESS CONTROL VALVES - NOISE CONDITIONS - METHOD FOR LABORATORY MEASUREMENT OF NOISE GENERATED BY HYDRODYNAMIC FLOW THROUGH CONTROL VALVES
    BS 6686-1:1986 Methods for determination of airborne acoustical noise emitted by household and similar electrical appliances General requirements for testing

    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 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
    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
    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 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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