DS/IEC 118-4
Methods of measurement of electroacoustical characteristics of hearing aids - Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes
inactive, Most Current
| Organization: | DS |
| Publication Date: | 1 January 1982 |
| Status: | inactive |
| ICS Code (Aids for deaf and hearing impaired people): | 11.180.15 |
scope:
The standard applies to audio-frequency induction loop systems producing an alternating magnetic field and intended to provide an input signal for hearing aids operating with an induction pick-up coil. Specifies a standard value of magneticfield strength in audio-frequency induction loops for hearing aid purposes,such as will give an adequate signal-to-noise ratio without overloading the haring aid.
Document History
DS/IEC 118-4
January 1, 1982
Methods of measurement of electroacoustical characteristics of hearing aids - Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes
The standard applies to audio-frequency induction loop systems producing an alternating magnetic field and intended to provide an input signal for hearing aids operating with an induction pick-up...
References
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