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)
NORM herausgegeben am 1.7.2000
Designation standards: ÖNORM EN ISO 389-1
Note: UNGÜLTIG
Publication date standards: 1.7.2000
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: Austrian technische Norm
Kategorie: Technische Normen ÖNORM