Acoustics - Reference zero for the calibration of audiometric equipment - Part 9: Preferred test conditions for the determination of reference hearing threshold levels (ISO 389-9:2009)
STANDARD published on 1.1.2010
Designation standards: STN EN ISO 389-9
Classification mark: 011630
Catalog number: 110050
Publication date standards: 1.1.2010
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: Slovak technical standard
Category: Technical standards STN