SN EN 60268-4:1999现行

Specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also gives recommendations as to characteristics to be specified.

DIN EN 60268-4 (2004-07) - Identical

BS EN 60268-4:2004 - Identical

SS EN 60268-4 Ed. 2 (2004) - Identical

NF EN 60268-4:2005 - Identical

NBN EN 60268-4:2005 - Identical

I.S. EN 60268-4:2004 - Identical

NBN EN 60268-4:2010 - Identical

BS EN 60268-4:2014 - Identical

EN 60268-4:2014 - Identical

NF EN 60268-4:2012 - Identical

NBN EN 60268-4:2014 - Identical

NF EN 60268-4:2014 - Identical

SS EN 60268-4 Ed. 3 (2011) - Identical

SS EN 60268-4 Ed. 4 (2014) - Identical