Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
NORM herausgegeben am 1.6.2020
Designation standards: ČSN EN ISO 389-7
Classification mark: 011630
Catalog number: 509683
Note: UNGÜLTIG
Publication date standards: 1.6.2020
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Czech technical standard
Kategorie: Technische Normen ČSN