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NF EN ISO 7235:2009现行

Acoustics - Laboratory Measurement Procedures For Ducted Silencers And Air-terminal Units - Insertion Loss, Flow Noise And Total Pressure Loss

出版：Association Francaise de Normalisation

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基本信息

标准编号： NF EN ISO 7235:2009

发布时间：2009/11/1 0:00:00

标准类别：Standard

出版单位：Association Francaise de Normalisation

标准页数：60

标准简介

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.

标准备注

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) 2004 version is still active. (11/2009)

本标准替代的旧标准

NF ISO 7235 : 1991

NF EN ISO 7235:2004

等同采用的国际标准

NBN EN ISO 7235:2003 - Identical

UNE EN ISO 7235:2004 - Identical

NEN EN ISO 7235:2009 - Identical

I.S. EN ISO 7235:2009 - Identical

SN EN ISO 7235:2003 - Identical

SS EN ISO 7235 Ed. 3 (2009) - Identical

NBN EN ISO 7235:2009 - Identical

BS EN ISO 7235:2009 - Identical