Acoustics. Reference zero for the calibration of audiometric equipment. Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones.
NORMA vydaná dňa 15.5.2000
Designation standards: BS EN ISO 389-1:2000
Note: NEPLATNÁ
Publication date standards: 15.5.2000
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: British technical standard
Kategória: Technické normy BS