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IEC 60118-8-ed.2.0
Electroacoustics - Hearing aids - Part 8: Methods of measurement of performance characteristics of hearing aids under simulated [in situ] working conditions
STANDARD published on 19.10.2005
The information about the standard:
Designation standards: IEC 60118-8-ed.2.0
Publication date standards: 19.10.2005
SKU: NS-408911
The number of pages: 63
Approximate weight : 189 g (0.42 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60118-8-ed.2.0 :
Describes methods for a test which simulates the acoustical effects of a median adult wearer on the performance of a hearing aid. Establishes certain guidelines for simulated in situ measurements of hearing aids; it describes a simplified method for simulated in situ measurements of hearing aids and a description for determination of the directivity index (DI) of directional microphones in hearing aids in the horizontal plane. In addition this second edition now specifies tolerances. Conformance to the specifications in this International Standard is demonstrated only when the result of a measurement, extended by the actual expanded uncertainty of measurement of the testing laboratory, lies fully within the tolerances specified in this International Standard extended by the values for Umax Decrit les methodes pour un essai qui simule les effets acoustiques dun adulte moyen, porteur dun appareil de correction auditive, sur les caracteristiques de lappareil. Etablit un certain nombre de directives pour la mesure des appareils de correction auditive dans des conditions simulees de fonctionnement in situ; elle decrit une methode simplifiee pour la mesure des appareils de correction auditive, dans des conditions simulees de fonctionnement in situ, et une methode permettant de determiner lindice de directivite (ID) des microphones directionnels utilises dans les appareils de correction auditive, dans le plan horizontal. De plus, cette deuxieme edition de la presente partie de la CEI 60118 specifie desormais les tolerances. Dans la presente Norme Internationale, la conformite aux specifications nest demontree que lorsque les resultats de mesure, augmentes de lincertitude etendue reelle de mesure du laboratoire dessai, sont entierement compris dans les tolerances specifiees dans la presente Norme Internationale etendues aux valeurs Umax.
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