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http://dx.doi.org/10.5050/KSNVE.2011.21.9.842

Characteristics of Sound Response in Ear Canal of Human and Reproduction of Acoustical Space  

Ahn, Tae-Soo (동의대학교 대학원 기계공학과)
Lee, Doo-Ho (동의대학교 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.21, no.9, 2011 , pp. 842-849 More about this Journal
Abstract
The human ear canal amplifies the sound pressure level at specific frequency bands. The characteristics of the ear canal are very similar to those of curved cylindrical tube. In this study, the characteristics of sound transfer in human ear canal were measured and the acoustical space of ear canal was reproduced from the canal cavity geometry. For the measurement of sound transfer function in ear canal, a probe microphone and a reference microphone were used. The sound transfer functions were measured for 5 human subjects. To reproduce the acoustical space of the ear canal, two kinds of ear simulator were designed. The first one is a straight cylindrical tube type and the other is a real-shape ear of which geometry was taken from a micro-CT scanning of a human ear. The characteristics of the reproduced apparatus were compared with those of the human and a commercial ear simulator, RA0045 of G.R.A.S. Inc. The comparison results show that the developed apparatus well represent the ear canal characteristics in the low frequency, but have limited coincidence in level over high frequency range.
Keywords
Human Ear Canal; Sound Transfer Function; Ear Simulator;
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Times Cited By KSCI : 3  (Citation Analysis)
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