EN ISO 7235:2009
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)
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
|
Standards | Relationship |
BS EN ISO 7235:2009 | Identical |
NF EN ISO 7235 : 2009 | Identical |
NBN EN ISO 7235 : 2009 | Identical |
ISO 7235:2003 | Identical |
PN EN ISO 7235 : 2009 | Identical |
NEN EN ISO 7235 : 2009 | Identical |
SN EN ISO 7235:2010 | Identical |
UNI EN ISO 7235 : 2009 | Identical |
NS EN ISO 7235 : 2009 | Identical |
UNE-EN ISO 7235:2010 | Identical |
I.S. EN ISO 7235:2009 | Identical |
DIN EN ISO 7235:2010-01 | Identical |
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 |
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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