Speech recognition for standard Chinese-speaking bimodal cochlear implant users in competitive noise
Objective To investigate the utilization of competitive speech by standard Chinese bimodal cochlear implant(BIM)users under talker sex and spatial.Methods The speech reception thresholds(SRT)of 11 standard Chinese BIM users were tested under 4 different spatial competitive speech noises.The four spatial competitive speech noise environments were recorded as middle male voice,middle female voice,two sides male voice and two sides female voice according to the gender and orientation of the masked noise.Subjects were assessed with BIM and cochlear implantation(CI)alone hearing assistance.The target sound is one male voice directly in front(0°),and the masking sound is two male or two female voices,coming from separately directly in front(0°)or from both sides(±90°).Results There was no significant difference in SRT between the two groups(P＞0.05).The BIM group obtained masking release(MR)under talker sex cues,spatial cues,and talker sex+spatial cues,while the CI group obtained MR under talker sex,but masking inhibition under spatial cues and talker sex+spatial cues.There were no significant differences in MR between the three cues.There was no significant difference in MR between BIM group and CI group under talker sex cues and spatial cues,but there was difference between BIM group and CI group under talker sex+spatial cue(P=0.013).Conclusions Standard Chinese BIM users can use talker sex cues and spatial cues to separate competitive noise,but there is no significant difference in the ability to use talker sex and spatial cues between BIM and CI alone hearing aid,and the ability to use talker sex+spatial cues under BIM is better than that of cochlear alone hearing aid.
cochlear implantationbimodal cochlear implantationspeech recognitionspeech recognition in noise
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