Implantation of the HiRes90K™ Advantage Cochlear Implant With HiFocus™ Mid-Scala and Development of a Combined Electric and Acoustic Stimulation Technology in Adults With Partial Deafness

Exclusion Criteria

• •Preoperative audiometric conductive overlay of 15 dB or greater at two frequencies or more in range of 500-1000 Hz in the ear to be implanted
• •Congenital hearing loss (for purpose of this study, onset prior to age 2 years\*). \*Based on critical period for speech and language development
• •Duration greater than 30 years of severe-to-profound high-frequency hearing loss
• •Cochlear malformation or obstruction that would preclude full insertion of electrode array in the ear to be implanted
• •Medical or psychological conditions that contraindicate surgery or impact the ability to manage an implanted device or the study related procedures as determined by the investigator
• •Deafness due to central auditory lesion or cochlear nerve deficiency, diagnosis of auditory neuropathy/dys-synchrony in either the ear to be implanted or the contralateral ear
• •Active middle-ear disease/infection in the ear to be implanted
• •Unrealistic expectations regarding potential benefits, risks and limitations inherent to implant surgical procedures as determined by the investigator
• •Unwillingness or inability of subject to comply with all investigational requirements as determined by the investigator
• •Unilaterally implanted with HiRes 90K™ Advantage cochlear implant with HiFocus™ Helix® and HiFocus™ 1j electrode
• •Exclusive use of a body worn external sound processor
• •Deafness due to central auditory lesion or cochlear nerve deficiency, diagnosis of auditory neuropathy/dys-synchrony in either the implanted or the contralateral ear
• •Postoperative unaided low frequency audiometric hearing thresholds in the treated ear exceeding 80 dB HL at each frequency from 125 - 1000 Hz Unwillingness or inability of subject to comply with all investigational requirements as determined by the investigator