SN EN ISO 3741:2011現(xiàn)行
Acoustics - Determination Of Sound Power Levels And Sound Energy Levels Of Noise Sources Using Sound Pressure - Precision Methods For Reverberation Test Rooms
出版：Swiss Standards
專家解讀視頻
Gives a direct and a comparison method to determine the sound power level that would be produced by a source operating in an environment at standard meterological conditions corresponding to a characteristic impedance of pc = 400 N-s/m3. Specifies test room requirements, source location and general rules for operating conditions. Suitable for steady noise with broad-band, narrow-band and discrete-frequency components. Applies to noise sources with volumes which are preferably not more than 2% of the volumes of the reverberation room which is used for the test.
NF EN ISO 3741:2012 - Identical
UNE EN ISO 3741:2011 - Identical
NS EN ISO 3741:2010 - Identical
ONORM EN ISO 3741:2011 - Identical
NBN EN ISO 3741:2010 - Identical
DIN EN ISO 3741 (2011-01) - Identical
UNI EN ISO 3741:2010 - Identical
SS EN ISO 3741 Ed. 3 (2010) - Identical
NEN EN ISO 3741:2010 - Identical
I.S. EN ISO 3741:2010 - Identical
BS EN ISO 3741:2010 - Identical
UNE EN ISO 3741:2010 - Identical
NF EN ISO 3741:2009 - Identical
