NA 023
DIN-Normenausschuss Ergonomie (NAErg)
Technische Regel
[AKTUELL]
ETSI ES 200381-2 V 1.1.1
ETSI ES 200381-2 V 1.1.1
Telephony for hearing impaired people - Inductive coupling of telephone earphones to hearing aids - Part 2: Cellular speech terminals
Titel (englisch)
Telephony for hearing impaired people - Inductive coupling of telephone earphones to hearing aids - Part 2: Cellular speech terminals