
State system for ensuring the uniformity of measurements. Acoustics. Reference zero for the calibration of audiometric equipment. Part 9. Preferred test conditions for the determination of reference hearing threshold levels
NORMA vydána dne 1.12.2015
Designation standards: GOST R ISO 389-9-2014
Publication date standards: 1.12.2015
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: Russian technical standard
Kategorie: Technické normy GOST