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date: 16 February 2020

Abstract and Keywords

This chapter provides a summary of the history of cochlear implants, how a cochlear implant works, and the criteria for candidacy and how that has changed over the years. In addition, this chapter addresses critical issues related to whether profoundly deafened listeners should receive one or two cochlear implants. Speech recognition and localization performance of subjects who wear bilateral cochlear implants (simultaneous or sequentially implanted) will be discussed in comparison to subjects who wear only one cochlear implant or a cochlear implant and a hearing aid. In addition, this chapter will provide a review of the literature analyzing the effects of one versus two cochlear implants, as well as recommendations for who should receive bilateral cochlear implants. This chapter also briefly discusses shortcomings in testing methodology typically used to evaluate the performance of cochlear implants, and surveys future directions.

Keywords: cochlear implants, bilateral cochlear implants, unilateral cochlear implants, bilateral benefit

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