EN 60318-3:2015 Electroacoustics - Simulators of human head and ear - Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry
European Committee for Electrotechnical Standardization（CENELEC）
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EN 60318-3:2015
Scope
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 person's 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
EN 60318-3:2015 history
2015EN 60318-3:2015 Electroacoustics - Simulators of human head and ear - Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry
1998EN 60318-3:1998 Electroacoustics - Simulators of Human Head and Ear Part 3: Acoustic Coupler for the Calibration of Supra-Aural Earphones Used in Audiometry