NF Z89-381*NF ETS 300381:1997
Telephony for hearing impaired people. Inductive coupling of telephone earphones to hearing aids.

Standard No.

NF Z89-381*NF ETS 300381:1997

Release Date

1997

Published By

Association Francaise de Normalisation

Latest

NF Z89-381*NF ETS 300381:1997

NF Z89-381*NF ETS 300381:1997 history

• 1997 NF Z89-381*NF ETS 300381:1997 Telephony for hearing impaired people. Inductive coupling of telephone earphones to hearing aids.