Acoustics. Reference zero for the calibration of audiometric equipment. Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones. (ISO 389-1:1998)
NORMA vydaná dňa 30.4.2001
Designation standards: UNE-EN ISO 389-1:2001
Note: NEPLATNÁ
Publication date standards: 30.4.2001
The number of pages: 17
Approximate weight : 51 g (0.11 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE