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)
NORMA vydaná dňa 20.1.2021
Designation standards: UNE-EN ISO 389-7:2021
Publication date standards: 20.1.2021
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE