Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:2019)
NORM herausgegeben am 1.3.2020
Designation standards: STN EN ISO 389-7
Classification mark: 011630
Catalog number: 130380
Publication date standards: 1.3.2020
Approximate weight : 30 g (0.07 lbs)
Country: Slovak technical standard
Kategorie: Technische Normen STN