Abstract
Background Cochlear implant (CI) users have difficulty appreciating music and perceiving lexical tones in Mandarin Chinese. Wearing a hearing aid (HA) in the contralateral ear for bimodal hearing may provide additional benefits. Objectives To measure the bimodal benefits of music perception and tone recognition and to investigate the relationship between the two in Mandarin-speaking bimodal CI subjects. Materials and methods Sixteen Mandarin-speaking bimodal CI subjects (aged between 16 and 49 years) participated in the study. Music perception (pitch discrimination, melody discrimination and instrument identification) and lexical tone recognition were tested with electric stimulation (CI alone) or bimodal stimulation (CI + HA). Results Subjects showed a significant bimodal benefit in tone recognition in quiet and noise, and in all music perception tests. The bimodal benefit for tone recognition in noise was significantly correlated with that of pitch discrimination thresholds and instrument identification scores. Conclusion Mandarin-speaking bimodal CI users achieved better music perception and tone recognition ability with CI + HA than with CI alone. The bimodal benefit of tone recognition was significantly correlated with that of music perception.
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