Acoustics - Reference zero for the calibration of audiometric equipment - Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones (ISO 389-1:2017)
STANDARD published on 1.7.2018
Designation standards: STN EN ISO 389-1
Classification mark: 011630
Catalog number: 126804
Publication date standards: 1.7.2018
Approximate weight : 30 g (0.07 lbs)
Country: Slovak technical standard
Category: Technical standards STN