The aims of the study were to investigate whether sound localization acuity improved when children with 1 cochlear implant use a hearing aid in the contralateral ear (bimodal fitting), and whether this enabled them to benefit from a binaural masking level difference. Four different noise bursts were used as stimuli for a minimal audible angle localization test. On average, localization acuity remained poor with the cochlear implant alone, but also with bimodal fitting. A significant benefit of bimodal fitting was only shown when the most complicated stimulus with roved amplitude and spectrum was presented (minimal audible angle of 151° with bimodal fitting vs. 175° with cochlear implant alone). No significant binaural masking level difference was found between the cochlear implant alone and the bimodal condition.

Keywords:
Cochlear implant, Hearing aid, Bimodal fitting, Children, Binaural hearing, Sound localization, Masking level difference
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2009
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