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NF EN ISO 3741 : 2012

Current

Current

The latest, up-to-date edition.

ACOUSTICS - DETERMINATION OF SOUND POWER LEVELS AND SOUND ENERGY LEVELS OF NOISE SOURCES USING SOUND PRESSURE - PRECISION METHODS FOR REVERBERATION TEST ROOMS

Published date

12-01-2013

Avant-propos
Introduction
1 Domaine d'application
2 Références normatives
3 Termes et définitions
4 Incertitude de mesure
5 Environnement acoustique
6 Appareillage de mesure
7 Installation et fonctionnement de la source en essai
8 Mesurages de la pression acoustique et calcul de la
   puissance acoustique
9 Informations à consigner
10 Informations à faire figurer dans le rapport d'essai
Annexe A (normative) - Méthode de qualification de la salle
         pour le mesurage de composantes tonales
Annexe B (informative) - Principes directeurs pour la
         conception des diffuseurs tournants
Annexe C (informative) - Extension aux fréquences
         inférieures à 100 Hz
Annexe D (informative) - Principes directeurs pour la
         conception des salles réverbérantes
Annexe E (normative) - Méthode de qualification de la
         salle d'essai pour le mesurage de bruits à
         large bande
Annexe F (normative) - Procédure de calcul des niveaux
         de puissance acoustique par bandes d'octave et
         du niveau de puissance acoustique pondéré A à
         partir des niveaux de puissance acoustique par
         bandes de tiers d'octave
Bibliographie

Gives a direct and a comparison method to determine the sound power level that would be produced by a source operating in an environment at standard meterological conditions corresponding to a characteristic impedance of pc = 400 N-s/m3. Specifies test room requirements, source location and general rules for operating conditions. Suitable for steady noise with broad-band, narrow-band and discrete-frequency components. Applies to noise sources with volumes which are preferably not more than 2% of the volumes of the reverberation room which is used for the test.

DevelopmentNote
Indice de classement: S31-022. Supersedes NF EN 23741 and NF EN 23742. (10/2000) Supersedes NFS 31 022 PROJET. (09/2003) PR NF EN ISO 3741 April 2006. (04/2006) PR NF EN ISO 3741 May 2009. (05/2009)
DocumentType
Standard
PublisherName
Association Francaise de Normalisation
Status
Current
Supersedes

Standards Relationship
UNE-EN ISO 3741:2011 Identical
BS EN ISO 3741:2009 Identical
I.S. EN ISO 3741:2010 Identical
EN ISO 3741:2010 Identical
UNI EN ISO 3741 : 2010 Identical
DIN EN ISO 3741:2011-01 Identical
ISO 3741:2010 Identical
SN EN ISO 3741:2011 Identical

NF ISO 13347-2 : 2004 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 2: REVERBERANT ROOM METHOD
NF EN 60034-9 : 2005 AMD 1 2007 ROTATING ELECTRICAL MACHINES - PART 9: NOISE LIMITS
NF ISO 13347-1 : 2004 AMD 1 2011 INDUSTRIAL FANS - DETERMINATION OF FAN SOUND POWER LEVELS UNDER STANDARDIZED LABORATORY CONDITIONS - PART 1: GENERAL OVERVIEW
NF EN ISO 5135 : 1999 ACOUSTICS - DETERMINATION OF SOUND POWER LEVELS OF NOISE FROM AIR-TERMINAL DEVICES, AIR-TERMINAL UNITS, DAMPERS AND VALVES BY MEASUREMENT IN REVERBERATION ROOM
NF EN 12012-1 : 2007 + A1 2008 PLASTICS AND RUBBER MACHINES - SIZE REDUCTION MACHINES - PART 1: SAFETY REQUIREMENTS FOR BLADE GRANULATORS

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