S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Journal Papers (저널논문_전기·정보공학부)
Design and Initial Clinical Test Results of a Simplified Cochlear Implant System
- 이중재; 안순관; 박세익; 김성준
- Issue Date
- 제15회 한국 반도체 학술대회, 보광 휘닉스 파크, 2008년 2월 20-22일
- A simplified cochlear implant system would be appropriate for widespread use in developing countries. Such a system has been developed as an academia-industrial project. The system implements 8 channel Continuous Interleaved Sampling (CIS) strategy. A generic Digital Signal Processing (DSP) chip is used for the processing with FFT filtering. Data derived from the processing are transmitted through an inductive link using Pulse Width Modulation (PWM) encoding and Amplitude Shift Keying (ASK) modulation. The same link is used in the reverse direction for backward telemetry of electrode and system information. A custom receiver-stimulator chip has been developed that demodulates incoming data using pulse counting and produces charge balanced biphasic pulses at 1000 pulses/s/channel. This chip is encased in a titanium package. An intra-cochlear electrode array with 16 ball-shaped stimulating contacts was also fabricated.
Speech perception tests with Ineraid patients to evaluate the effectiveness of the system were performed at the Center for Auditory Prosthesis Research at the Research Triangle Institute (RTI) in the United States.