使用半波整流和正弦幅度调制刺激在人工耳蜗使用者中进行调制率辨别。
Modulation rate discrimination using half-wave rectified and sinusoidally amplitude modulated stimuli in cochlear-implant users.
机构信息
Department of Otolaryngology, Clinical Psychoacoustics Laboratory, University of Minnesota, Rm 8-323 Phillips-Wangensteen Building, 420 Delaware Street Southeast, Minneapolis, Minnesota 55455, USA.
出版信息
J Acoust Soc Am. 2010 Feb;127(2):656-9. doi: 10.1121/1.3282947.
Abstract
Detection and modulation rate discrimination were measured in cochlear-implant users for pulse-trains that were either sinusoidally amplitude modulated or were modulated with half-wave rectified sinusoids, which in acoustic hearing have been used to simulate the response to low-frequency temporal fine structure. In contrast to comparable results from acoustic hearing, modulation rate discrimination was not statistically different for the two stimulus types. The results suggest that, in contrast to binaural perception, pitch perception in cochlear-implant users does not benefit from using stimuli designed to more closely simulate the cochlear response to low-frequency pure tones.
摘要
检测和调制速率辨别能力在接受人工耳蜗植入的患者中进行了测量，所使用的刺激脉冲序列为正弦波调幅或半波整流正弦波调制，这两种刺激在听觉中被用来模拟低频时程精细结构的反应。与听觉结果相比，两种刺激类型的调制速率辨别能力没有统计学差异。研究结果表明，与双耳感知不同，人工耳蜗植入患者的音调感知并不能受益于使用设计来更紧密地模拟低频纯音对耳蜗反应的刺激。
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