Stream segregation on a single electrode as a function of pulse rate in cochlear implant listeners
Stream segregation on a single electrode as a function of pulse rate in cochlear implant listeners
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DOI：
10.1121/1.4764875
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发表时间：
2012-12-01
影响因子：
2.4
通讯作者：
Throckmorton, Chandra S.
中科院分区：
文献类型：
--
作者：
Duran, Sara I.;Collins, Leslie M.;Throckmorton, Chandra S.
虽然人工耳蜗（CI）通常在安静的环境中提供高水平的语音识别，但在噪声中的语音识别仍然具有挑战性。为了克服这些困难，重要的是要了解植入的监听器是如何将目标信号与干扰信号分离的。在正常听力和电听力中，流分离作为刺激位置的函数已被广泛研究。然而，脉冲频率的影响，独立的地方，在电听觉的顺序声音的感知分组尚未被调查。节奏检测任务被用来测量流分离。这项研究的结果表明，虽然CI听众可以隔离流的基础上的脉冲率的差异单独，流隔离观察到的基础脉冲率的增加而减少。进一步调查的感知维度编码的脉冲率和不同的刺激率的顺序呈现对感知的影响可能是有益的未来发展的语音处理策略CI。(C)2012年美国声学学会。[http：//dx.doi.org/10.1121/1.4764875]
While cochlear implants (CIs) usually provide high levels of speech recognition in quiet, speech recognition in noise remains challenging. To overcome these difficulties, it is important to understand how implanted listeners separate a target signal from interferers. Stream segregation has been studied extensively in both normal and electric hearing, as a function of place of stimulation. However, the effects of pulse rate, independent of place, on the perceptual grouping of sequential sounds in electric hearing have not yet been investigated. A rhythm detection task was used to measure stream segregation. The results of this study suggest that while CI listeners can segregate streams based on differences in pulse rate alone, the amount of stream segregation observed decreases as the base pulse rate increases. Further investigation of the perceptual dimensions encoded by the pulse rate and the effect of sequential presentation of different stimulation rates on perception could be beneficial for the future development of speech processing strategies for CIs. (C) 2012 Acoustical Society of America. [http://dx.doi.org/10.1121/1.4764875]