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NBN EN ISO 7235:2009現行

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

出版：Belgian Standards

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基本信息

標準編號： NBN EN ISO 7235:2009

發布時間：2009/12/1 0:00:00

標準類別：Standard

出版單位：Belgian Standards

標準頁數：29

標準簡介

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.

標準備注

Supersedes NBN ISO 7235 (11/2003)

本標準替代的舊標準

NBN EN ISO 7235:2003

NBN ISO 7235 : 1992

等同采用的國際標準

BS EN ISO 7235:2009 - Identical

I.S. EN ISO 7235:2009 - Identical

NEN EN ISO 7235:2009 - Identical

UNI EN ISO 7235:2009 - Identical

NF EN ISO 7235:2009 - Identical

DIN EN ISO 7235 (2010-01) - Identical