NEN 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：Nederlands Normalisatie Instituut
专家解读视频
Defines methods for determining the insertion loss, in frequency bands, of ducted silencers with and without airflow, the sound power level, in frequency bands, of the flow noise (or regenerated sound) generated by ducted silencers, the total pressure loss of silencers with airflow, and the transmission loss, in frequency bands, of air-terminal units.
Supersedes NEN ISO 7235. (07/2003)
UNI EN ISO 7235:2005 - Identical
I.S. EN ISO 7235:2009 - Identical
UNI EN ISO 7235:2009 - Identical
NF EN ISO 7235:2009 - Identical
DIN EN ISO 7235 (2010-01) - Identical
NS EN ISO 7235:2009 - Identical
NBN EN ISO 7235:2003 - Identical
NF EN ISO 7235:2004 - Identical
NS EN ISO 7235 Ed. 2 (2003) - Identical
UNE EN ISO 7235:2004 - Identical
SS EN ISO 7235 Ed. 2 (2004) - Identical
NBN EN ISO 7235:2009 - Identical
BS EN ISO 7235:2009 - 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
SN EN ISO 7235:2003 - Identical
ONORM EN ISO 7235:2003 - Identical
