Recent Progress in Cochlear Implant

摘要: In modern cochlear implants, the electrode array has a small volume, is less stiff, and positioned to prevent traumatic contact with fine structure of cochlea. With these improvements, causes trauma, preservation residual inner ear function possible. Newly developed speech coding strategies are based on psychology hearing. The reproduced by mimicking temporal excitatory patterns hair cells. role virtual channel excite spiral ganglion neurons located between two contacts controlling current spread from neighboring electrodes. psychoacoustic masking model also utilized in selection. This considers physiological effect reduces number stimulated channels without deteriorating understanding. Due development atraumatic arrays, hearing at low frequencies can be preserved after implantation. remaining transmit low-frequency sounds, basal turn, which high-frequency electrically (electric acoustic stimulation). Bilateral implantation new trend. use implants improves sound source localization understanding noisy environments.