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IEC 60318-3-ed.2.0
Electroacoustics - Simulators of human head and ear - Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry
STANDARD published on 11.12.2014
The information about the standard:
Designation standards: IEC 60318-3-ed.2.0
Publication date standards: 11.12.2014
SKU: NS-409547
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60318-3-ed.2.0 :
IEC 60318-3:2014 specifies an acoustic coupler for the measurement of supra-aural audiometric earphones in the frequency range from 125 Hz to 8 000 Hz. The sound pressure developed by an earphone is not, in general, the same in the coupler as in a persons ear. However, the acoustic coupler can be used as an objective and reproducible means of measuring the output of supra-aural earphones. It can be used for specifying reference equivalent threshold sound pressure levels for the calibration of audiometers. This second edition cancels and replaces the first edition published in 1998 and constitutes a technical revision which includes the following significant technical changes with respect to the previous edition: - adjustment of terms and wording to the other parts of IEC 60318; - introduction of maximum permitted uncertainties; - and revised requirements for static pressure equalization. Keywords: electroacoustics, deafness, hearing aids LIEC 60318-3:2014 specifie un coupleur acoustique destine a la mesure des ecouteurs audiometriques supra-auraux, dans la plage de frequences comprise entre 125 Hz et 8 000 Hz. La pression acoustique produite par un ecouteur nest pas, en general, la meme dans ce coupleur et dans une oreille humaine. Toutefois, le coupleur acoustique peut etre utilise en tant que moyen objectif et reproductible de mesurer la valeur de sortie des casques supra-auraux. Il peut etre utilise pour preciser les niveaux de reference equivalents au seuil de pression acoustique pour letalonnage des audiometres. Cette deuxieme edition annule et remplace la premiere edition parue en 1998. Cette edition constitue une revision technique qui inclut les modifications techniques majeures suivantes par rapport a ledition precedente: - reajustement des termes et formulation par rapport aux autres parties de lIEC 60318; - introduction des incertitudes maximales permises; - et exigences revisees pour legalisation de la pression statique. Mots cle: electroacourtique, surdite, sonotone
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