The aim of this project was to determine, for bimodal cochlear implant (CI) patients, i.e., patients with low-frequency hearing in the ear contralateral to the implant, how speech understanding varies as a function of the difference in level between the CI signal and the acoustic signal. The data suggest that (i) acoustic signals perceived as significantly softer than a CI signal can contribute to speech understanding in the bimodal condition, (ii) acoustic signals that are slightly softer than, or balanced with, a CI signal provide the largest benefit to speech understanding and (iii) acoustic signals presented at MCL provide nearly as much benefit as signals that have been balanced with a CI signal.
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