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  • ISO 5136:2003

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    Acoustics Determination of sound power radiated into a duct by fans and other air-moving devices In-duct method

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English, French

    Published date:  31-03-2003

    Publisher:  International Organization for Standardization

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    Abstract - (Show below) - (Hide below)



    ISO 5136 specifies 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.

    The method is applicable to fans which emit steady, broad-band, narrow-band and discrete-frequency sound and to air temperatures between - 50 °C and + 70 °C. The test duct diameter range is from 0,15 m to 2 m. Test methods for small (d < 0,15 m) and large (d > 2 m) test ducts are described in the informative annexes H and I, respectively.

    The maximum mean flow velocity at the microphone head for which the method is suitable, depends on the type of microphone shield used, and is as follows:

    foam ball 15 m/s; nose cone 20 m/s; sampling tube 40 m/s.

    Above these values the suppression of turbulent pressure fluctuations by the microphone shield may be insufficient.

    The method described in ISO 5136 is applicable to a sound source in which a fan is connected to ducts on at least one side. It is also applicable to other fan/attenuator combinations or equipment incorporating fans which can be considered as "black boxes".

    Examples of fans and other equipment covered by ISO 5136 are

    ducted centrifugal fans, ducted axial flow fans, ducted mixed-flow fans, ducted air-handling units, ducted dust-collection units, ducted air-conditioning units, and ducted furnaces.

    ISO 5136 is also applicable to other aerodynamic sources such as boxes, dampers and throttle devices provided that a quiet air flow delivered by an auxiliary fan is available, and the signal-to-noise ratio of sound pressures to turbulent pressure fluctuations in the test duct is at least 6 dB.

    It is not applicable to non-ducted fans or equipment.

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

    Committee ISO/TC 43/SC 1
    Development Note Supersedes ISO/DIS 5136 (04/2003)
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current
    Supersedes

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

    17/30332536 DC : 0 BS EN 13141-5 - VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 5: COWLS AND ROOF OUTLET TERMINAL DEVICES
    EN 13141-4:2011 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 4: FANS USED IN RESIDENTIAL VENTILATION SYSTEMS
    I.S. EN 16475-2:2017 CHIMNEYS - ACCESSORIES - PART 2: CHIMNEY FANS - REQUIREMENTS AND TEST METHODS
    DIN EN 16475-2 E : 2017 CHIMNEYS - ACCESSORIES - PART 2: CHIMNEY FANS - REQUIREMENTS AND TEST METHODS
    EN 13141-7:2010 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 7: PERFORMANCE TESTING OF A MECHANICAL SUPPLY AND EXHAUST VENTILATION UNITS (INCLUDING HEAT RECOVERY) FOR MECHANICAL VENTILATION SYSTEMS INTENDED FOR SINGLE FAMILY DWELLINGS
    01/562316 DC : DRAFT JULY 2001 BS EN ISO 7235 ACOUSTICS - LABORATORY MEASUREMENT PROCEDURES FOR DUCTED SILENCERS AND AIR-TERMINAL UNITS - INSERTION LOSS, FLOW NOISE AND TOTAL PRESSURE LOSS
    BS 848-9(2006) : 2006 FANS FOR GENERAL PURPOSES - PART 9: TOLERANCES, METHODS OF CONVERSION AND TECHNICAL DATA PRESENTATION
    BS EN 13141-11:2015 (published 2015-05) Ventilation for buildings. Performance testing of components/products for residential ventilation Supply ventilation units
    BS EN 16475-2:2017 (published 2017-04) Chimneys. Accessories Chimney fans. Requirements and test methods
    13/30279269 DC : 0 BS EN 16583 - HEAT EXCHANGERS - HYDRONIC ROOM FAN COILS UNITS - DETERMINATION OF THE SOUND POWER LEVEL
    13/30267124 DC : 0 BS EN 13141-11 - VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 11: POSITIVE PRESSURE VENTILATION SYSTEMS
    UNI ISO 13347-3 : 2009 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 3: ENVELOPING SURFACE METHODS
    BS ISO 13347-3 : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 3: ENVELOPING SURFACE METHOD
    BS 848-9(2007) : 2007 FANS FOR GENERAL PURPOSES - PART 9: TOLERANCES, METHODS OF CONVERSION AND TECHNICAL DATA PRESENTATION
    BS EN 16583:2015 Heat exchangers. Hydronic room fan coils units. Determination of the sound power level
    08/30183867 DC : DRAFT AUG 2008 BS EN 13141-7 - VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 7: PERFORMANCE TESTING OF A MECHANICAL SUPPLY AND EXHAUST VENTILATION UNITS (INCLUDING HEAT RECOVERY) FOR MECHANICAL VENTILATION SYSTEMS INTENDED FOR SINGLE FAMILY DWELLINGS
    DIN EN 13141-11 E : 2015 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 11: SUPPLY VENTILATION UNITS
    I.S. EN 12102-1:2017 AIR CONDITIONERS, LIQUID CHILLING PACKAGES, HEAT PUMPS, PROCESS CHILLERS AND DEHUMIDIFIERS WITH ELECTRICALLY DRIVEN COMPRESSORS - DETERMINATION OF THE SOUND POWER LEVEL - PART 1: AIR CONDITIONERS, LIQUID CHILLING PACKAGES, HEAT PUMPS FOR SPACE HEATING AND COOLING, DEHUMIDIFIERS AND PROCESS CHILLERS
    BS EN ISO 5801:2017 Fans. Performance testing using standardized airways
    EN ISO 5801:2017 FANS - PERFORMANCE TESTING USING STANDARDIZED AIRWAYS (ISO 5801: 2017)
    DIN EN 16583:2015-10 Heat exchangers - Hydronic room fan coils units - Determination of the sound power level
    DIN EN 16583 E : 2015 HEAT EXCHANGERS - HYDRONIC ROOM FAN COILS UNITS - DETERMINATION OF THE SOUND POWER LEVEL
    VDI 2715:2011-11 NOISE CONTROL IN HEATING SYSTEMS
    02/705655 DC : DRAFT APR 2002 BS 848-2.3 - INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVEL UNDER STANDARDIZED LABORATORY CONDITIONS - PART 3: ENVELOPING SURFACE METHODS
    DIN EN 13141-11:2015-07 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 11: SUPPLY VENTILATION UNITS
    14/30284736 DC : 0 BS EN ISO 5801 - FANS - PERFORMANCE TESTING USING STANDARDIZED AIRWAYS
    03/316891 DC : DRAFT OCT 2003 EN 13053 - VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATINGS AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    02/705656 DC : DRAFT APR 2002 BS 848-2.4 - INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVEL UNDER STANDARDIZED LABORATORY CONDITIONS - PART 4: SOUND INTENSITY METHOD
    PREN 13141-5 : DRAFT 2017 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 5: COWLS AND ROOF OUTLET TERMINAL DEVICES
    UNI ISO 13347-1 : 2009 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 1: GENERAL OVERVIEW
    BS 848-2.3(2004) : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 3: ENVELOPING SURFACE METHODS
    BS 848-2.2(2004) : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 2: REVERBERANT ROOM METHOD
    95/704659 DC : DRAFT MAR 1995 PREN 1872 - MACHINES FOR UNDERGROUND MINES - SAFETY REQUIREMENTS FOR MINING VENTILATION MACHINERY - ELECTRICALLY DRIVEN FANS FOR UNDERGROUND USE
    14/30303313 DC : 0 PD 5304 - GUIDANCE ON SAFE USE OF MACHINERY
    BS ISO 13347-2 : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 2: REVERBERANT ROOM METHOD
    PREN 13053 : DRAFT 2017 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    BS 848-2.1(2004) : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 1: GENERAL OVERVIEW
    I.S. EN ISO 5801:2017 FANS - PERFORMANCE TESTING USING STANDARDIZED AIRWAYS (ISO 5801: 2017)
    ISO 13347-2:2004 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 2: Reverberant room method
    I.S. EN 13141-11:2015 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 11: SUPPLY VENTILATION UNITS
    ISO 13348:2007 Industrial fans Tolerances, methods of conversion and technical data presentation
    BS ISO 13347-1 : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 1: GENERAL OVERVIEW
    UNE-EN 13141-11:2015 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 11: Supply ventilation units
    I.S. EN 16583:2015 HEAT EXCHANGERS - HYDRONIC ROOM FAN COILS UNITS - DETERMINATION OF THE SOUND POWER LEVEL
    17/30339487 DC : 0 BS EN 13053 - VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    EN 12102-1:2017 Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers with electrically driven compressors - Determination of the sound power level - Part 1: Air conditioners, liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and process chillers
    UNE-EN 16583:2016 Heat exchangers - Hydronic room fan coils units - Determination of the sound power level
    ISO 13347-1:2004 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 1: General overview
    ISO 5801:2017 Fans — Performance testing using standardized airways
    ISO 13347-3:2004 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 3: Enveloping surface methods
    UNI EN 13141-7 : 2011 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 7: PERFORMANCE TESTING OF A MECHANICAL SUPPLY AND EXHAUST VENTILATION UNITS (INCLUDING HEAT RECOVERY) FOR MECHANICAL VENTILATION SYSTEMS INTENDED FOR SINGLE FAMILY DWELLINGS
    EN 13053:2006+A1:2011 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    UNI EN 13141-4 : 2011 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 4: FANS USED IN RESIDENTIAL VENTILATION SYSTEMS
    I.S. EN 13053:2006 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    VDI 2081-1 : 2001 NOISE GENERATION AND NOISE REDUCTION IN AIR-CONDITIONING SYSTEMS
    DIN EN 12354-5:2009-10 BUILDING ACOUSTICS - ESTIMATION OF ACOUSTIC PERFORMANCE OF BUILDING FROM THE PERFORMANCE OF ELEMENTS - PART 5: SOUNDS LEVELS DUE TO THE SERVICE EQUIPMENT
    UNE-EN 13141-7:2011 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings
    BS EN 15036-2 : 2006 HEATING BOILERS - TEST REGULATIONS FOR AIRBORNE NOISE EMISSIONS FROM HEAT GENERATORS - PART 2: FLUE GAS NOISE EMISSIONS AT THE OUTLET OF THE HEAT GENERATOR
    BS EN 13141-7:2010 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 7: PERFORMANCE TESTING OF A MECHANICAL SUPPLY AND EXHAUST VENTILATION UNITS (INCLUDING HEAT RECOVERY) FOR MECHANICAL VENTILATION SYSTEMS INTENDED FOR SINGLE FAMILY DWELLINGS
    BS ISO 13347-4 : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 4: SOUND INTENSITY METHOD
    UNI EN 13053 : 2011 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    UNE-EN ISO 7235:2010 Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss (ISO 7235:2003)
    ISO 7235:2003 Acoustics Laboratory measurement procedures for ducted silencers and air-terminal units Insertion loss, flow noise and total pressure loss
    BS EN 12354-5 : 2009 BUILDING ACOUSTICS - ESTIMATION OF ACOUSTIC PERFORMANCE OF BUILDING FROM THE PERFORMANCE OF ELEMENTS - PART 5: SOUNDS LEVELS DUE TO THE SERVICE EQUIPMENT
    ISO 13347-4:2004 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 4: Sound intensity method
    BS EN 13141-4:2011 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 4: FANS USED IN RESIDENTIAL VENTILATION SYSTEMS
    ONORM EN 13053 : 2011 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    BS EN ISO 11820 : 1997 ACOUSTICS - MEASUREMENTS ON SILENCERS IN SITU
    BS 848-2.4(2004) : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 4: SOUND INTENSITY METHOD
    UNE-EN 13141-4:2012 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 4: Fans used in residential ventilation systems
    BS EN 13053 : 2006 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
    I.S. EN 13141-4:2011 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 4: FANS USED IN RESIDENTIAL VENTILATION SYSTEMS
    I.S. EN ISO 7235:2009 ACOUSTICS - LABORATORY MEASUREMENT PROCEDURES FOR DUCTED SILENCERS AND AIR-TERMINAL UNITS - INSERTION LOSS, FLOW NOISE AND TOTAL PRESSURE LOSS
    DIN EN 15036-2:2006-12 Heating boilers - Test regulations for airborne noise emissions from heat generators - Part 2: Flue gas noise emissions at the outlet of the heat generator
    I.S. EN 13141-7:2010 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 7: PERFORMANCE TESTING OF A MECHANICAL SUPPLY AND EXHAUST VENTILATION UNITS (INCLUDING HEAT RECOVERY) FOR MECHANICAL VENTILATION SYSTEMS INTENDED FOR SINGLE FAMILY DWELLINGS
    DIN EN 13053:2012-02 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS (INCLUDES AMENDMENT A1:2011)
    DIN EN 13141-7:2011-01 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 7: Performance testing of a mechanical supply and exhaust ventilation units (including heat recovery) for mechanical ventilation systems intended for single family dwellings
    DIN EN 13141-4:2011-09 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 4: Fans used in residential ventilation systems
    DIN EN ISO 7235:2010-01 Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss (ISO 7235:2003)
    EN 13141-11:2015 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 11: Supply ventilation units
    EN 12354-5:2009/AC:2010 BUILDING ACOUSTICS - ESTIMATION OF ACOUSTIC PERFORMANCE OF BUILDING FROM THE PERFORMANCE OF ELEMENTS - PART 5: SOUNDS LEVELS DUE TO THE SERVICE EQUIPMENT
    ONORM EN 13141-4 : 2011 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 4: FANS USED IN RESIDENTIAL VENTILATION SYSTEMS
    ONORM EN 13141-7 : 2010 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 7: PERFORMANCE TESTING OF A MECHANICAL SUPPLY AND EXHAUST VENTILATION UNITS (INCLUDING HEAT RECOVERY) FOR MECHANICAL VENTILATION SYSTEMS INTENDED FOR SINGLE FAMILY DWELLINGS
    EN 16583:2015 Heat exchangers - Hydronic room fan coils units - Determination of the sound power level
    EN ISO 7235:2009 ACOUSTICS - LABORATORY MEASUREMENT PROCEDURES FOR DUCTED SILENCERS AND AIR-TERMINAL UNITS - INSERTION LOSS, FLOW NOISE AND TOTAL PRESSURE LOSS
    EN 16475-2:2017 Chimneys - Accessories - Part 2: Chimney fans - Requirements and test methods
    EN 15036-2 : 2006 HEATING BOILERS - TEST REGULATIONS FOR AIRBORNE NOISE EMISSIONS FROM HEAT GENERATORS - PART 2: FLUE GAS NOISE EMISSIONS AT THE OUTLET OF THE HEAT GENERATOR
    UNI EN ISO 7235 : 2009 ACOUSTICS - LABORATORY MEASUREMENT PROCEDURES FOR DUCTED SILENCERS AND AIR- TERMINAL UNITS - INSERTION LOSS, FLOW NOISE AND TOTAL PRESSURE LOSS
    UNI EN 12354-5 : 2009 BUILDING ACOUSTICS - ESTIMATION OF ACOUSTIC PERFORMANCE OF BUILDING FROM THE PERFORMANCE OF ELEMENTS - PART 5: SOUNDS LEVELS DUE TO THE SERVICE EQUIPMENT

    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
    2006/42/EC : 2006 AMD 4 2014 DIRECTIVE 2006/42/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL OF 17 MAY 2006 ON MACHINERY, AND AMENDING DIRECTIVE 95/16/EC (RECAST) (TEXT WITH EEA RELEVANCE)
    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
    1998/37/EC : 1998 DIRECTIVE 98/37/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL OF 22 JUNE 1998 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES RELATING TO MACHINERY
    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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