Hearing loss has a substantial impact on general health and well-being. For individuals with severe to profound hearing loss, cochlear implants (CI) have become a viable treatment option. Nowadays, many recipients of unilateral CIs have usable residual hearing in the non-implanted ear and wear a hearing aid (HA) in the contralateral ear. The combination of a CI in one ear and a HA in the other ear is called bimodal hearing, aiming to restore binaural hearing as much as possible. In this thesis new ways are investigated to improve bimodal auditory functioning.