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IEC 60118-4-ed.3.0
Electroacoustics - Hearing aids - Part 4: Induction-loop systems for hearing aid purposes - System performance requirements
STANDARD published on 11.12.2014
The information about the standard:
Designation standards: IEC 60118-4-ed.3.0
Publication date standards: 11.12.2014
SKU: NS-408907
The number of pages: 109
Approximate weight : 358 g (0.79 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60118-4-ed.3.0 :
IEC 60118-4:2014 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. This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision which includes the following significant technical changes with respect to the previous edition: Addition of Annexes G, H and I where more information is provided about practical considerations and methods of measurement. LIEC 60118-4:2014 sapplique aux systemes de boucles dinduction audiofrequences qui produisent un champ magnetique alternatif a frequence acoustique et destines a produire un signal dentree aux appareils de correction auditive en exploitation avec une bobine dinduction captrice. Dans toute la presente norme, on suppose que les appareils de correction auditive utilises sont conformes a toutes les parties appropriees de lIEC 60118. Cette norme specifie des exigences concernant lintensite du champ dans les boucles dinduction utilisees a des fins de correction auditive, qui correspond a un rapport signal sur bruit convenable sans surcharge de lappareil de correction auditive. La norme specifie egalement des exigences concernant la reponse en frequence minimale pour une intelligibilite acceptable. Les methodes de mesure de lintensite du champ magnetique et des renseignements sur lequipement de mesure approprie (voir Annexe B), ainsi que les renseignements quil convient de fournir aux operateurs et aux utilisateurs du systeme (voir Annexe C) sont donnes, avec dautres considerations importantes. Par contre, la presente norme ne specifie pas dexigences concernant les amplificateurs qui alimentent la boucle, le microphone associe, les sources du signal acoustique, qui sont decrits dans lIEC 62489-1, ou lintensite du champ produit par des appareillages tels que les appareils telephoniques, dans le domaine dapplication de la norme UIT-T P370. Cette troisieme edition annule et remplace la deuxieme edition parue en 2006. Ledition de cette partie constitue une revision technique qui inclut les modifications techniques majeures suivantes par rapport a ledition precedente: ajout des Annexes G, H et I qui apportent plus dinformation concernant des considerations pratiques et les methodes de mesure.
These changes apply to this standard:
IEC 60118-4-ed.3.0/Amd.1
Change
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Amendment 1 - Electroacoustics - Hearing aids - Part 4: Induction-loop systems for hearing aid purposes - System performance requirements
(Amendement 1 - Electroacoustique - Appareils de correction auditive - Partie 4: Systemes de boucles d´induction utilisees a des fins de correction auditive - Exigences de performances systeme)
Change published on 9.11.2017
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