Averaging of sound levels.
NORM herausgegeben am 1.6.1990
Designation standards: DIN 45641:1990-06
Publication date standards: 1.6.1990
The number of pages: 11
Approximate weight : 33 g (0.07 lbs)
Country: German technical standard
Kategorie: Technische Normen DIN
Mittelung von Schallpegeln.