NS 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：Norwegian Standards (Norges Standardiseringsforbund)
专家解读视频
Specifies the substitution method for determining the insertion loss of ducted silencers.
NBN EN ISO 7235:2009 - Identical
NBN EN ISO 7235:2003 - Identical
UNE EN ISO 7235:2004 - Identical
NEN EN ISO 7235:2009 - Identical
SN EN ISO 7235:2003 - Identical
SN EN ISO 7235:2010 - Identical
UNE EN ISO 7235:2010 - Identical
SS EN ISO 7235 Ed. 3 (2009) - Identical
ONORM EN ISO 7235:2010 - Identical
NF EN ISO 7235:2009 - Identical
UNI EN ISO 7235:2009 - Identical
