Auditory Nerve Monitoring Using Intra-cochlear Stimulation in Subjects With Acoustic Neuroma

Inclusion Criteria: * Must be 18 years or older * Patient with an acoustic neuroma already surgically removed with associated hearing loss (experimental group), * Patient with an acoustic neuroma programmed to be surgically removed and candidates for an implantable hearing rehabilitation solution (experimental group), * Patient with an acoustic neuroma that not need to be removed and candidate for an implantable hearing rehabilitation solution (experimental group), or * Typical patient candidate for a cochlear implant (control group) Exclusion Criteria: * Cochlea malformation, cochlea ossification * Vulnerable subject