Evaluation of Cochlear (Promontory) Stimulation During Awake Ear Surgery (TONES Study)

Exclusion Criteria

• •1. Individual has had severe-to-profound hearing loss for more than 30 years.
• •2. Individual has congenital hearing loss (for the purpose of this study, onset prior to 2 years of age)
• •3. Ear canal will not accommodate a speculum with minimum outer diameter (OD) of 4.0 mm or other anatomic challenges present as determined by the study investigator
• •4. Hearing loss or auditory processing disorder of neural or central origin
• •5. Active middle ear infection
• •6. History of cholesteatoma treated within the past 2 years
• •7. Ossification of the cochlear or other previously identified cochlear anomaly
• •8. Prior major head trauma (stroke, hemorrhage, traumatic brain injury) within past 2 years
• •9. Contralateral presence of cochlear implant
• •10. Individual is pregnant.
• •11. Individual is unable or unwilling to complete training for qualitative evaluation of promontory electrical stimulation.
• •12. A disability that could interfere with intraoperative evaluations as determined by study investigator.
• •13. Profound tinnitus
• •14. History of vertigo that would interfere with the planned investigation as determined by the principal investigator