
Acoustics--Reference zero for the calibration of audiometric equipment--Part1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
NORM herausgegeben am 13.5.2004
Designation standards: GB/T 4854.1-2004
Publication date standards: 13.5.2004
Country: Chinese technical standard
Kategorie: Technische Normen GB