Engineering Design of Cochlear Implants

The cochlear implant is the most successful neural prosthesis developed to date. Approximately 60,000 people have received cochlear implants as of this writing. This number exceeds by orders of magnitude the numbers for any other type of neural prosthesis. According to the recent National Institutes of Health (NIH) Consensus Statement on Cochlear Implants (1995), “A majority of those individuals with the latest speech processors for their implants will score above 80 percent correct on high-context sentences, even without visual cues.” This level of success is truly remarkable, given the relatively crude representations of speech and other sounds provided by present implant systems.

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