• NF EN ISO 3741 : 2012

    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

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    Published date:  12-01-2013

    Publisher:  Association Francaise de Normalisation

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    Table of Contents - (Show below) - (Hide below)

    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

    Abstract - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Development Note 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)
    Document Type Standard
    Publisher Association Francaise de Normalisation
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    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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