Design of a Signal Processing Module with Various Filters Characteristics for Fully Implantable Middle Ear Hearing Devices

Young-Ho YOON  Hyung-Gyu LIM  Jyung-Hyun LEE  Hee-Joon PARK  Il-Yong PARK  Min-Kyu KIM  Chul-Ho WON  Byung-Seop SONG  Jin-Ho CHO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E89-A   No.6   pp.1695-1698
Publication Date: 2006/06/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e89-a.6.1695
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Papers Selected from 2005 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC2005))
fully implantable middle ear hearing device,  FIR filter,  Remez algorithm,  time-delay,  

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In this paper, the voice signal processing module has been designed using the micro processor for the use of fully implantable middle ear devices (F-IMEHD). The voice signal processing module for F-IMEHD should be designed to compensate for the hearing loss of hearing impaired person and have the flexibility for compensating various hearing threshold level. So, the voice signal processing module has been designed and implemented to present the various frequency characteristics using the low-power micro processor, MSP430F169. The different voice signal path to the inner ear entrance was considered so that two voice signal would be combined in-phase using an all pass filter with a constant time-delay to improve the vibration of the ossicles.