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- W630142527 abstract "Cochlear implants are used by severely deaf people for partial hearing sensation. Behavioral modeling of the external part of the cochlear implant was first performed using the software Matlab. Then the propagation channel was modeled using electrical analogy of the biological tissues. Noise extraction of the propagation channel was performed in order to obtain the specifications for the RF receiver. Two types of diverse modulations are performed in the transmitter each one requiring an oscillator. The theoretical study and the creation of a new model allowing phase noise estimation is also proposed in this document. Jitter estimation from phase noise was performed and significantly impacted the overall chain transmission, suggesting oscillators blocks optimization. The accurate heterogeneous modeling of the various part of the internal ear leading to auditory nerve excitation was developed. Then a new mechanical equivalent of the organ of Corti and stereocilia displacement was developed and confirmed by physical experiments. The synapse between the hair cells and nerve fibers was mathematically modeled, in order to obtain the electrical stimulus of the auditory nerve associated with a random sound stimulus. Furthermore a new analog model of the nerve fiber information propagation was realized in order to obtain a realistic electrical analogy with nerve fiber depolarization propagation. Based on impedance spectroscopy biological tissue characterization, we proposed a new electrical analogy of the system composed of the electrodes inserted inside the cochlea." @default.
- W630142527 created "2016-06-24" @default.
- W630142527 creator A5021888092 @default.
- W630142527 date "2014-09-12" @default.
- W630142527 modified "2023-09-28" @default.
- W630142527 title "Modélisation et optimisation d'un émetteur-récepteur faible bruit pour implants cochléaires" @default.
- W630142527 hasPublicationYear "2014" @default.
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