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EN ISO 7235:2009

Current
Current

The latest, up-to-date edition.

Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss (ISO 7235:2003)
Published date

05-08-2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Test facilities and requirements for instrumentation
  5.1 Purpose and types of test facilities
  5.2 Equipment for acoustic testing of silencers
  5.3 Equipment for acoustic testing of air-terminal
      units
  5.4 Equipment for flow testing
  5.5 Equipment for dynamic testing
6 Test procedures
  6.1 General
  6.2 Insertion loss
  6.3 Transmission loss
  6.4 Sound power level of the flow noise (or regenerated
      sound)
  6.5 Volume flow rate and pressure loss coefficient
7 Information to be recorded
  7.1 Description of the test object
  7.2 Instrumentation
  7.3 Sound-source equipment
  7.4 Test, substitution and transmission ducts
  7.5 Transitions
  7.6 Anechoic termination
  7.7 Reverberation room
  7.8 Acoustical test results
  7.9 Measurement uncertainty
8 Information to be reported
Annex A (normative) - Design of the sound field excitation
                         equipment and qualification tests
Annex B (normative) - Transmission element
Annex C (normative) - Duct walls and limiting insertion
                         loss
Annex D (normative) - Conversion of one-third-octave-band
                         attenuation values to octave-band
                         attenuation values
Annex E (normative) - Measurements on large parallel-baffle
                         silencers
Annex F (normative) - Test of longitudinal attenuation
Annex G (informative) - Anechoic terminations
Annex H (informative) - Examples of measurement arrangements
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
Bibliography

ISO 7235:2003 specifies methods for determiningthe insertion loss, in frequency bands, of ducted silencers with and without airflow,the sound power level, in frequency bands, of the flow noise (or regenerated sound) generated by ducted silencers,the total pressure loss of silencers with airflow, andthe transmission loss, in frequency bands, of air-terminal units.The measurement procedures are intended for laboratory measurements at ambient temperature. Measurements on silencers in situ are specified in ISO 11820.It is to be noted that the results determined in a laboratory according to ISO 7235:2003 will not necessarily be the same as those obtained in situ (installation), as different sound and flow fields will yield different results. For example, the pressure loss will be lower under laboratory conditions than in situ, but will be comparable between different laboratories.ISO 7235:2003 is applicable to all types of silencer including silencers for ventilating and air-conditioning systems, air intake and exhaust of flue gases, and similar applications. Other passive air-handling devices, such as bends, air-terminal units or T-connectors, can also be tested using this International Standard.It is not applicable to reactive silencers used for motor vehicles.

Committee
CEN/TC 211
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

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
CEI EN 60704-2-10 : 2012 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE - PART 2-10: PARTICULAR REQUIREMENTS FOR ELECTRIC COOKING RANGES, OVENS, GRILLS, MICROWAVE OVENS AND ANY COMBINATION OF THESE
CEI EN 60704-2-6 : 2013 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE - PART 2-6: PARTICULAR REQUIREMENTS FOR TUMBLE DRYERS
BS EN 60704-2-13:2017 Household and similar electrical appliances. Test code for the determination of airborne acoustical noise Particular requirements for range hoods and other cooking fume extractors
BS EN 13141-2:2010 Ventilation for buildings. Performance testing of components/products for residential ventilation Exhaust and supply air terminal devices
EN 13141-2:2010 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 2: Exhaust and supply air terminal devices
EN 60704-2-6:2012 Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-6: Particular requirements for tumble dryers
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
I.S. 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
PREN 13141-5 : DRAFT 2017 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 5: COWLS AND ROOF OUTLET TERMINAL DEVICES
PREN 13053 : DRAFT 2017 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
I.S. EN 60704-2-6:2012 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE - PART 2-6: PARTICULAR REQUIREMENTS FOR TUMBLE DRYERS (IEC 60704-2-6:2012 (EQV))
I.S. EN 13053:2006 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
NF EN 13053 : 2006 + A1 2011 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATINGS AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
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 60704-2-10:2012 Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-10: Particular requirements for electric cooking ranges, ovens, grills, microwave ovens and any combination of these
UNE-EN 60704-2-6:2013 Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-6: Particular requirements for tumble dryers
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 13141-2:2010-12 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 2: Exhaust and supply air terminal devices
I.S. EN 13141-2:2010 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 2: EXHAUST AND SUPPLY AIR TERMINAL DEVICES
CEI EN 60704-2-13 : 2012 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE - PART 2-13: PARTICULAR REQUIREMENTS FOR RANGE HOODS AND OTHER COOKING FUME EXTRACTORS
BS EN 60704-2-10:2011 Household and similar electrical appliances. Test code for the determination of airborne acoustical noise Particular requirements for electric cooking ranges, ovens, grills, microwave ovens and any combination of these
BS EN 60704-2-6:2012 Household and similar electrical appliances. Test code for the determination of airborne acoustical noise Particular requirements for tumble dryers
ISO 15712-4:2005 Building acoustics Estimation of acoustic performance of buildings from the performance of elements Part 4: Transmission of indoor sound to the outside
UNE-EN 13141-2:2011 Ventilation for buildings - Performance testing of components/products for residential ventilation - Part 2: Exhaust and supply air terminal devices
BS EN 13053 : 2006 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
UNE-EN 60704-2-13:2017 Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-13: Particular requirements for range hoods and other cooking fume extractors
UNI EN 13141-2 : 2010 VENTILATION FOR BUILDINGS - PERFORMANCE TESTING OF COMPONENTS/PRODUCTS FOR RESIDENTIAL VENTILATION - PART 2: EXHAUST AND SUPPLY AIR TERMINAL DEVICES
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
EEMUA 161 : 2014 SILENCERS AND ACOUSTIC ENCLOSURES - GUIDE TO SELECTION AND ASSESSMENT
I.S. EN 12354-4:2000 BUILDING ACOUSTICS - ESTIMATION OF ACOUSTIC PERFORMANCE OF BUILDINGS FROM THE PERFORMANCE OF ELEMENTS - PART 4: TRANSMISSION OF INDOOR SOUND TO THE OUTSIDE
03/316891 DC : DRAFT OCT 2003 EN 13053 - VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATINGS AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
17/30339487 DC : 0 BS EN 13053 - VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
16/30344387 DC : 0 BS EN 16475-1 - CHIMNEYS - ACCESSORIES - PART 1: CHIMNEY SILENCERS - REQUIREMENTS AND TEST METHODS
I.S. EN 60704-2-10:2011 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE - PART 2-10: PARTICULAR REQUIREMENTS FOR ELECTRIC COOKING RANGES, OVENS, GRILLS, MICROWAVE OVENS AND ANY COMBINATION OF THESE (IEC 60704-2-10:2011 (EQV))
UNE-EN 13053:2007 Ventilation for buildings - Air handling units - Rating and performance for units, components and sections
BS EN 12354-4:2000 Building acoustics. Estimation of acoustic performance in buildings from the performance of elements Transmission of indoor sound to the outside
ISO 14163:1998 Acoustics — Guidelines for noise control by silencers
UNI EN 13053 : 2011 VENTILATION FOR BUILDINGS - AIR HANDLING UNITS - RATING AND PERFORMANCE FOR UNITS, COMPONENTS AND SECTIONS
BS EN 12354-5:2009 Building acoustics. Estimation of acoustic performance of building from the performance of elements Sounds levels due to the service equipment
BS EN ISO 14163:1998 Acoustics. Guidelines for noise control by silencers
EN ISO 14163 : 1998 ACOUSTICS - GUIDELINES FOR NOISE CONTROL BY SILENCERS
16/30334506 DC : 0 BS EN ISO 12354-4 - BUILDING ACOUSTICS - ESTIMATION OF ACOUSTIC PERFORMANCE OF BUILDINGS FROM THE PERFORMANCE OF ELEMENTS - PART 4: TRANSMISSION OF INDOOR SOUND TO THE OUTSIDE
I.S. EN 60704-2-13:2017 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE - PART 2-13: PARTICULAR REQUIREMENTS FOR RANGE HOODS AND OTHER COOKING FUME EXTRACTORS
EN 13053:2006+A1:2011 Ventilation for buildings - Air handling units - Rating and performance for units, components and sections
EN 12354-4:2000 Building Acoustics - Estimation of acoustic performance of buildings from the performance of elements - Part 4: Transmission of indoor sound to the outside
EN 60704-2-13:2017 Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-13: Particular requirements for range hoods and other cooking fume extractors
EN 60704-2-10:2011 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE - PART 2-10: PARTICULAR REQUIREMENTS FOR ELECTRIC COOKING RANGES, OVENS, GRILLS, MICROWAVE OVENS AND ANY COMBINATION OF THESE (IEC 60704-2-10:2011)

ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
ISO 11200:2014 Acoustics Noise emitted by machinery and equipment Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions
EN 12238:2001 Ventilation for buildings - Air terminal devices - Aerodynamic testing and rating for mixed flow application
IEC 60942:2003 Electroacoustics - Sound calibrators
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate measures of the precision of a standard measurement method
ISO 5725-6:1994 Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy values
ISO 5725-4:1994 Accuracy (trueness and precision) of measurement methods and results Part 4: Basic methods for the determination of the trueness of a standard measurement method
ISO 11820:1996 Acoustics — Measurements on silencers in situ
BS 4718:1971 Methods of test for silencers for air distribution systems
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 5135:1997 Acoustics Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room
ISO 5167-1:2003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements
ISO 9614-3:2002 Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 3: Precision method for measurement by scanning
EN 12239:2001 Ventilation for buildings - Air terminal devices - Aerodynamic testing and rating for displacement flow applications
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 14163:1998 Acoustics — Guidelines for noise control by silencers
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 5221:1984 Air distribution and air diffusion Rules to methods of measuring air flow rate in an air handling duct
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
EN 12589:2001 Ventilation for buildings - Air terminal units - Aerodynamic testing and rating of constant and variable rate terminal units
ISO 3966:2008 Measurement of fluid flow in closed conduits Velocity area method using Pitot static tubes
ISO 5136:2003 Acoustics — Determination of sound power radiated into a duct by fans and other air-moving devices — In-duct method
ISO 5725-5:1998 Accuracy (trueness and precision) of measurement methods and results — Part 5: Alternative methods for the determination of the precision of a standard measurement method
IEC 60651:1979+AMD1:1993+AMD2:2000 CSV Sound level meters
IEC 60804:2000 Integrating-averaging sound level meters

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