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NSAI
I.S. EN ISO 7235:2009

I.S. 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

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-01-2009

Publisher

National Standards Authority of Ireland

Preview

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

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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