Implementation and testing of novel current steering strategy for cochlear implant systems
碩士 === 國立交通大學 === 生醫工程研究所 === 99 === The number of electrodes of traditional cochlear implant determines the number of channels that users could perceive. Intermediate channels, also called virtual channels, between two neighboring electrodes can be created by simultaneous electrical stimulation in...
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| Format: | Others |
| Language: | en_US |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/09344242864358805724 |
| Summary: | 碩士 === 國立交通大學 === 生醫工程研究所 === 99 === The number of electrodes of traditional cochlear implant determines the number of channels that users could perceive. Intermediate channels, also called virtual channels, between two neighboring electrodes can be created by simultaneous electrical stimulation in cochlear implant systems through controlled channel interaction, called current steering. Since current steering allows more precise electrical stimulation to the auditory nerves, it is assumed that it can improve the pitch perception of cochlear implant recipients. We conducted the first pitch ranking and pitch discrimination clinical experiment on cochlear implant patients using current steering technology in Taiwan to evaluate the number of virtual channels created by current steering could be perceived by CI users. It is found that the hearing and current steering performance of CI users vary from patient to patient. A patient specific cochlear implant model is needed to design an optimzed current steering strategy and this model would allow us to simulate the electrical stimulation more precisely for a particular CI user This patient specific CI model is constructed based on the electrophysiological property measured from real CI users and has been studied on two CI users.
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