Realistic cochlear implant simulations to capture sound quality

Abstract

Cochlear implants (CIs) are inner ear prostheses that enable people with profound hearing loss to perceive acoustic stimuli. In this thesis German-language CI simulations for CI users at different stages of rehabilitation were created. These simulations were used to determine perceived sound quality and investigate potential influencing factors. A software sound tool developed specifically for this thesis was programmed to create CI simulations matching individual CI perception. 20 German-speaking CI users rated the similarity of simulations to their CI hearing using a 10-point scale. Substantial interindividual variability was found. Psychoacoustic and objective tests quantified variability in CI sound quality. The sound quality saturates to excellent sound quality for large CI experiences (> 6 years). The results highlight the role of neuronal plasticity and the value of CI simulations for research and education.