
Acoustics — Reference zero for the calibration of audiometric equipment — Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
NORMA vydaná dňa 13.12.2017
Designation standards: ISO 389-1:2017-ed.2.0
Publication date standards: 13.12.2017
The number of pages: 10
Approximate weight : 30 g (0.07 lbs)
Country: International technical standard
Kategória: Technické normy ISO