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Electro-tactile stimulation (ETS) enhances cochlear-implant Mandarin tone recognition

World Journal of Otorhinolaryngology-Head and Neck Surgery 2017年第4期3卷 219-223页

作者： Juan Huang janice chang Fan-Gang Zeng Mind and Brain Institute Department of Biomedical Engineering Johns Hopkins UniversityBaltimore MD 21218 USA Department of Otorhinolaryngology Head and Neck Surgery University of California Los Angeles CA90095 USA Department of Anatomy and Neurobiology Center for Hearing Research 110 Medical Science EUniversity of California Irvine CA 92697-5320 USA Biomedical Engineering Center for Hearing Research 110 Medical Science E University of CaliforniaIrvine CA 92697-5320 USA Cognitive Sciences Center for Hearing Research 110 Medical Science E University of CaliforniaIrvine CA 92697-5320 USA Otorhinolaryngology Head and Neck Surgery Center for Hearing Research 110 Medical Science EUniversity of California Irvine CA 92697-5320 USA

Objective:Electro-acoustic stimulation (EAS) is an effective method to enhance cochlear-implant performance in individuals who have residual low-frequency acoustic *** help the majority of cochlear implant users who do not have any functional residual acoustic hearing,electro-tactile stimulation (ETS) may be used because tactile sensation has a frequency range and perceptual capabilities similar to that produced by acoustic stimulation in the EAS ***:Following up the first ETS study showing enhanced English sentence recognition in noise,1 the present study evaluated the effect of ETS on Mandarin tone recognition in noise in two groups of adult Mandarin-speaking *** first group included 11 normalhearing individuals who listened to a 4-channel,noise-vocoded,cochlear-implant *** second group included 1 unilateral cochlear-implant user and 2 bilateral users with each of their devices being tested *** groups participated in a 4-alternative,forced-choice task,in which they had to identify a tone that was presented in noise at a 0-dB signal-to-noise ratio via electric stimulation (actual or simulated cochlear implants),tactile stimulation or the combined ***:While electric or tactile stimulation alone produced similar tone recognition (～40％ correct),the ETS enhanced the cochlear-implant tone recognition by 17-18 percentage *** size of the present ETS enhancement effect was similar to that of the previously reported EAS effect on Mandarin tone *** analysis on tactile sensation showed an important role of frequency discrimination in the ETS ***:Tactile stimulation can potentially enhance Mandarin tone recognition in cochlear-implant users who do not have usable residual acoustic *** optimize this potential,high fundamental frequencies need to be transposed to a 100-200 Hz range.