IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Implantable microphone with acoustic tube for fully implantable hearing devices
Eui Sung JungKi Woong SeongHyung Gyu LimJyung Hyun LeeJin Ho Cho
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JOURNAL FREE ACCESS

2011 Volume 8 Issue 4 Pages 215-219

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Abstract

Fully Implantable hearing devices consist of a microphone that is implanted under the human skin. However after the implantation, the gain characteristics of the microphone are attenuated at the high frequencies because of the sound filtering effect of the skin and tissue. To solve this problems, we proposed an implantable microphone with an acoustic tube, which generates a resonance effect between the diaphragm and the acoustic transducer inside a case. By performing several experiments in water, it has been confirmed that the frequency response of the implantable microphone at high frequencies can be improved by use of the acoustic tube.

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© 2011 by The Institute of Electronics, Information and Communication Engineers
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