人工耳蜗植入后的听觉流分离：初步报告。
Auditory stream segregation with cochlear implants: A preliminary report.
作者信息
Chatterjee Monita, Sarampalis Anastasios, Oba Sandra I
机构信息
Department of Auditory Implants and Perception, House Ear Institute, 2100 W. Third St., Los Angeles, CA 90057, USA.
出版信息
Hear Res. 2006 Dec;222(1-2):100-7. doi: 10.1016/j.heares.2006.09.001. Epub 2006 Oct 27.
Auditory stream segregation was measured in cochlear implant (CI) listeners using a subjective "Yes-No" task in which listeners indicated whether a sequence of stimuli was perceived as two separate streams or not. Stimuli were brief, 50-ms pulse trains A and B, presented in an A_B_A_A_B_A... sequence, with 50 ms in between consecutive stimuli. All stimuli were carefully loudness-balanced prior to the experiments. The cochlear electrode location of A was fixed, while the location of B was varied systematically. Measures of electrode discrimination and subjective perceptual difference were also included for comparison. There was strong intersubject variation in the pattern of results. One of the participants participated in a second series of experiments, the results of which indicated that he was able to perceptually segregate stimuli that were different in cochlear electrode location, as well as stimuli that were different in temporal envelope. Although preliminary, these results suggest that it is possible for some cochlear implant listeners to perceptually segregate stimuli based on differences in cochlear location as well as temporal envelope.
使用主观的“是-否”任务对人工耳蜗（CI）使用者的听觉流分离进行了测量，在该任务中，受试者要指出一系列刺激是否被感知为两个独立的流。刺激为短暂的50毫秒脉冲序列A和B，以A_B_A_A_B_A...的序列呈现，连续刺激之间间隔50毫秒。在实验前，所有刺激都经过了仔细的响度平衡。A的耳蜗电极位置固定，而B的位置则系统地变化。还包括电极辨别和主观感知差异的测量以作比较。结果模式存在很强的个体间差异。其中一名受试者参与了第二系列实验，其结果表明他能够在感知上分离在耳蜗电极位置上不同的刺激，以及在时间包络上不同的刺激。尽管这些结果是初步的，但它们表明一些人工耳蜗使用者有可能基于耳蜗位置以及时间包络的差异在感知上分离刺激。
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