The effect of mismatch between electrode assigned frequencies and perceived pitch

A study from an Italian facility found that a "mismatch between frequencies allocated to electrodes and the pitch perceived on stimulation of the same electrodes could partially account for our subjects' difficulties with speech understanding in noisy conditions."

Bilateral and Unilateral Cochlear Implants and Speech Perception in Noise

A recent study found that bilateral cochlear implant users showed significantly better ability to understand speech in noisy environments when compared with unilateral cochlear implant users.

A similar recent study compared bimodal and bilateral cochlear implant users. The conclusion: "This research adds to the existing studies that show no significant difference between bimodal and bilateral cochlear implant users".