
TELEPHONY FOR HEARING IMPAIRED PEOPLE. INDUCTIVE COUPLING OF TELEPHONE EARPHONES TO HEARING AIDS.
STANDARD published on 28.6.1999
Designation standards: UNE-ETS 300381:1999
Publication date standards: 28.6.1999
The number of pages: 23
Approximate weight : 69 g (0.15 lbs)
Country: Spanish technical standard
Category: Technical standards UNE