Acoustics. Platform measurement of the noise emitted by ducted fans. Reduced chamber on discharge method.

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Main informations

Collections

National standards and national normative documents

Publication date

October 1982

Number of pages

17 p.

Reference

NF S31-021

ICS Codes

17.140.20 Noise emitted by machines and equipment

23.120 Ventilators. Fans. Air-conditioners

Classification index

S31-021

Print number

1 - septembre 1983

Replaced standards (1)

NF S31-021

April 1977

Standard Cancelled

Acoustics. Platform measurement of the noise emitted by encased fans. Reduced chamber on discharge method.

Standard replaced by (1)

NF ISO 13347-3

November 2004

Standard Cancelled

Industrial fans — Determination of fan sound power levels under standardized laboratory conditions — Part 3: Enveloping surface methods

Table of contents

Avant-propos
2
1 Objet et domaine d'application
2
2 Références
3
3 Définitions
3
4 Incertitude de mesurage
4
5 Généralités concernant la méthode de mesurage
5
6 Mesurage du bruit rayonné par les ouïes d'aspiration
9
7 Mesurage du bruit rayonné par l'enveloppe du ventilateur
13
8 Calcul et présentation des résultats
14
9 Procès-verbal d'essai
15
Annexe
16

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