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EVS-EN 60118-4:2007

Electroacoustics - Hearing aids -- Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength

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Kehtetu alates 04.03.2015
Alusdokumendid
IEC 60118-4:2006; EN 60118-4:2006
Tegevusala (ICS grupid)
17.140.50 Elektroakustika
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Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
04.03.2015
Põhitekst
06.02.2007
Põhitekst
Põhitekst
EVS-EN 60118-4:2002
This international standard is applicable to audio-frequency induction loop systems producing an alternating magnetic field at audio frequencies and intended to provide an input signal for hearing aids operating with an induction pick-up coil. The standard specifies requirements for the field strength in audio-frequency induction loops for hearing aid purposes, which will give adequate signal-to-noise ratio without overloading the hearing aid. The standard also specifies the minimum frequency response requirements for acceptable intelligibility. Methods for measuring the magnetic field strength are specified, and information is given on appropriate measuring equipment (see Annex B), information that should be provided to the operator and users of the system (see Annex C), and other important considerations.

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