Norm

NEN-EN-IEC 60118-4:2015 en

Elektro-akoestiek - Hoortoestellen - Deel 4: Ringleidingen voor de overdracht van audiofrequenties voor hoortoesteldoeleinden - Magnetische veldsterkte

226,42

Over deze norm

Status Definitief
Aantal pagina's 109
Commissie Elektro-akoestiek en ultrageluid
Gepubliceerd op 01-03-2015
Taal Engels
NEN-EN-IEC 60118-4 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 (telecoil). Throughout this standard, it is assumed that the hearing aids used with it conform to all relevant parts of IEC 60118. This 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. This standard does not specify requirements for loop driver amplifiers or associated microphone or audio signal sources, which are dealt with in IEC 62489-1, or for the field strength produced by equipment, such as telephone handsets, within the scope of ITU-T P.370.

Details

ICS-code 17.140.50
Nederlandse titel Elektro-akoestiek - Hoortoestellen - Deel 4: Ringleidingen voor de overdracht van audiofrequenties voor hoortoesteldoeleinden - Magnetische veldsterkte
Engelse titel Electroacoustics - Hearing aids - Part 4: Induction-loop systems for hearing aid purposes - System performance requirements
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