ES 200 381-1-2012 Telephony for hearing impaired people; Inductive coupling of telephone earphones to hearing aids; Part 1: Fixed-line speech terminals (V1.2.1)
ETSI - European Telecommunications Standards Institute
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ES 200 381-1-2012
Scope
The present document applies to fixed-line telephones having earphones (see ITU-T Recommendation P.57 [4]) which are intended for direct application to the ear (e.g. handsets@ supra-aural headsets) and which are intended to provide@ through the earphone@ a magnetic field for coupling to hearing aids. It specifies the level linearity and frequency dependence of the magnetic field strength produced by the handset and characteristics for the calibrated probe coil. It also specifies provisions for distortion@ noise and signal to noise ratio of the magnetic field. Provisions for DECT terminals@ are within the scope of this part 1 of this multipart deliverable@ even if it is a cordless technology. Handsfree or loudspeaking devices are outside the scope of the present document. The requirements for inductive coupling with wireless terminal earphones are outside the scope of the present document.
ES 200 381-1-2012 history
2012ES 200 381-1-2012 Telephony for hearing impaired people; Inductive coupling of telephone earphones to hearing aids; Part 1: Fixed-line speech terminals (V1.2.1)