
Specification for an artificial mastoid for the calibration of bone vibrators used in hearing aids and audiometers.
NORM herausgegeben am 22.3.1966
Designation standards: BS 4009:1966
Note: UNGÜLTIG
Publication date standards: 22.3.1966
Approximate weight : 300 g (0.66 lbs)
Country: British technical standard
Kategorie: Technische Normen BS