NF ISO 13347-4

NF ISO 13347-4

November 2004
Standard Cancelled

Industrial fans - Determination of fan sound power levels under standardized laboratory conditions - Part 4 : sound intensity method

ISO 13347-4:2004 applies to industrial fans as defined in ISO 5801 and ISO 13349. It is limited to the determination of airborne sound emission for the specified set-ups. Vibration is not measured, nor is the sensitivity of airborne sound emission to vibration effects determined.The sizes of the fan, which can be tested in accordance with ISO 13347-4:2004, are limited only by the practical aspects of the test installations.ISO 13347-4:2004 determines sound power by using sound intensity measurements on a measurement surface which encloses the sound source. It provides guidelines on the acoustical environment, ambient noise, measurement surface, and number of measurements. The test set-ups are generally designed to represent the physical orientation of a fan installed in accordance with ISO 5801 and also used in ISO 13347-2.

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Main informations

Collections

National standards and national normative documents

Publication date

November 2004

Number of pages

34 p.

Reference

NF ISO 13347-4

ICS Codes

17.140.20   Noise emitted by machines and equipment
23.120   Ventilators. Fans. Air-conditioners

Classification index

E51-006-4

Print number

2 - 01/01/2007

International kinship

ISO 13347-4:2004
Sumary
Industrial fans - Determination of fan sound power levels under standardized laboratory conditions - Part 4 : sound intensity method

ISO 13347-4:2004 applies to industrial fans as defined in ISO 5801 and ISO 13349. It is limited to the determination of airborne sound emission for the specified set-ups. Vibration is not measured, nor is the sensitivity of airborne sound emission to vibration effects determined.

The sizes of the fan, which can be tested in accordance with ISO 13347-4:2004, are limited only by the practical aspects of the test installations.

ISO 13347-4:2004 determines sound power by using sound intensity measurements on a measurement surface which encloses the sound source. It provides guidelines on the acoustical environment, ambient noise, measurement surface, and number of measurements. The test set-ups are generally designed to represent the physical orientation of a fan installed in accordance with ISO 5801 and also used in ISO 13347-2.

Standard replaced by (1)
NF ISO 13347-4
August 2025
Standard Current
Industrial fans - Determination of fan sound power levels under standardized laboratory conditions - Part 4 : sound intensity method

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Instruments et méthodes d'essai
    2
  • 4 Équipement et installations d'essai
    4
  • 5 Méthode d'essai
    12
  • 6 Calculs
    16
  • 7 Rapport et résultats
    19
  • Annexe A (normative) Indicateurs à utiliser en cas de problème
    21
  • Annexe B (normative) Mode opératoire de remplacement pour l'essai de systèmes de ventilateurs de grande taille
    22
  • Annexe C (normative) Son rayonné par l'enveloppe du ventilateur
    24
  • Bibliographie
    26
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