NF 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
12-01-2013
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 |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.