
Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
NBN EN ISO 3744:2010 - Identical
NEN EN ISO 3744:2010 - Identical
SS EN ISO 3744 Ed. 3 (2010) - Identical
NF EN ISO 3744:2009 - Identical
UNE EN ISO 3744:2010 - Identical