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Hydrogen Technologies Standards form the basic framework for market ramp-up
More information
Climate change Standards and specifications support climate targets
More information
Smart Farming Standards and specifications are drivers for the digitalization of agriculture
More information

Standards [CURRENT]

NF Z89-381 ; NF ETS 300381:1997-12-01
Telephony for hearing impaired people. Inductive coupling of telephone earphones to hearing aids

Title (German)

TELEFONIE FUER HOEBEEINTRAECHTIGTE MENSCHEN. INDUKTIVE KOPPLUNG VON TELEFON-HOERKAPSELN AN HOERHILFEN

Edition 1997-12-01

Original language French

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Terminology

Hydrogen Technologies Standards form the basic framework for market ramp-up

Climate change Standards and specifications support climate targets

Smart Farming Standards and specifications are drivers for the digitalization of agriculture

NF Z89-381 ; NF ETS 300381:1997-12-01 Telephony for hearing impaired people. Inductive coupling of telephone earphones to hearing aids

Want to learn more?

NF Z89-381 ; NF ETS 300381:1997-12-01
Telephony for hearing impaired people. Inductive coupling of telephone earphones to hearing aids