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AFNOR
NF EN ISO 7235 : 2009

NF 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

Published date

01-12-2013

Publisher

Association Francaise de Normalisation

Avant-propos
Introduction
1 Domaine d'application
2 Références normatives
3 Termes et définitions
4 Symboles
5 Installations d'essai et appareillage de mesure
6 Modes opératoires d'essai
7 Informations à consigner
8 Informations à fournir dans le rapport d'essai
Annexe A (normative) - Conception du dispositif d'excitation
         du champ acoustique et essais de qualification
Annexe B (normative) - Élément de transmission
Annexe C (normative) - Parois du conduit et perte limite
         d'insertion
Annexe D (normative) - Conversion des valeurs d'atténuation
         en bande de tiers d'octave en valeurs d'atténuation
         en bande d'octave
Annexe E (normative) - Mesurages sur des silencieux de
         grande taille à baffles parallèles
Annexe F (normative) - Essai relatif à l'atténuation
         longitudinale
Annexe G (informative) - Terminaisons anéchoïques
Annexe H (informative) - Exemples de dispositifs de mesure
Bibliographie

Specifies the substitution method for determining the insertion loss of ducted silencers. Sets out the requirements for determining: the sound power level, in frequency bands, of the flow noise generated by silencers; the insertion loss, in frequency bands, of silencers with and without air flow; the total pressure loss of silencers with air flow. Applies to silencers for ventilating and air-conditioning systems which are usually connected to ducts or splitter absorbers mounted in ducts.

DevelopmentNote
Indice de classement: S31-127. Supersedes NF ISO 7235. PR NF EN ISO 7235 September 2001. (10/2001) PR NF EN ISO 7235 June 2009. (06/2009)
DocumentType
Standard
PublisherName
Association Francaise de Normalisation
Status
Current
Supersedes

Standards Relationship
BS EN ISO 7235:2009 Identical
DIN EN ISO 7235:2010-01 Identical
I.S. EN ISO 7235:2009 Identical
EN ISO 7235:2009 Identical
UNE-EN ISO 7235:2010 Identical
SN EN ISO 7235:2010 Identical
ISO 7235:2003 Identical
UNI EN ISO 7235 : 2009 Identical

NF ISO 13347-2 : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 2: REVERBERANT ROOM METHOD

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