I.S. 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
Hardcopy , PDF
English
01-01-2009
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Test facilities and requirements for instrumentation
6 Test procedures
7 Information to be recorded
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
Applies to all types of silencer including silencers for ventilating and air-conditioning systems, air intake and exhaust of flue gases, and similar applications.
| DocumentType |
Standard
|
| Pages |
64
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| BS EN ISO 7235:2009 | Identical |
| NF EN ISO 7235 : 2009 | Identical |
| NBN EN ISO 7235 : 2009 | Identical |
| ISO 7235:2003 | Identical |
| EN ISO 7235:2009 | Identical |
| NEN EN ISO 7235 : 2009 | Identical |
| NS EN ISO 7235 : 2009 | Identical |
| DIN EN ISO 7235:2010-01 | Identical |
| UNE-EN ISO 7235:2010 | Identical |
| 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 |
| 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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