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- W2078410008 abstract "A coupler for earphone calibration has been developed that mimics the acoustic properties of the outer ear and has a simple geometry. It consists of an outer portion corresponding to the auricle, a canal corresponding to the ear canal, and an acoustic network reproducing the acoustic impedance at the eardurm. The sound pressure is measured at the eardrum location by means of a 14-in. condenser microphone. According to comparative measurements, the acoustic impedance at the end of the coupler canal follows the average eardrum impedance with satisfactory accuracy within the frequency limits of 100 and 7000 Hz. The coupler also produces essentially the same pressure transformation between the microphone, midcanal, canal entrance, outer rim, and 1 cm outside the outer rim as the pressure transformation in an average ear between corresponding points. The coupler may be used for supraaural earphones as well as for insert and circumaural earphones. It can be manufactured according to rigorous specifications." @default.
- W2078410008 created "2016-06-24" @default.
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- W2078410008 date "1971-07-01" @default.
- W2078410008 modified "2023-09-24" @default.
- W2078410008 title "An Ear‐Like Coupler for Calibration of Earphones" @default.
- W2078410008 doi "https://doi.org/10.1121/1.1977480" @default.
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