Prediction of post-operative profits in cochlear implanted patients using the electricostimulation procedure

The presented research is devoted to the problem of evaluation of the auditory nerve electrical sensitivity in deaf people. In the case of profound hearing impairments the assessment of the degree of hearing loss by using standard acoustic tests such as tonal or vocal audiometry, ABR testing, impedance audiometry, etc. would often conclude in a complete lack of response to an acoustic stimulus in the patient. That is why other diagnostic methods that would enable evaluation of the auditory nerve electrical sensitivity have been designed and introduced to the clinical practice. The method of speech signal transmission to the auditory nerve before cochlear implantation was conceived and tested. This method uses spectral transposition of signals delivered to the external electrode allowing to stimulate the auditory nerve