Effects of spectral resolution on spectral contrast effects in cochlear-implant users
Effects of spectral resolution on spectral contrast effects in cochlear-implant users
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DOI：
10.1121/1.5042082
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发表时间：
2018-06-01
影响因子：
2.4
通讯作者：
Oxenham, Andrew J.
中科院分区：
文献类型：
--
作者：
Feng, Lei;Oxenham, Andrew J.
语音的特性可能会受到先前刺激的长期频谱的影响。人工耳蜗(CI)较差的光谱分辨率可能会影响这种上下文效应。在这篇论文中，我们研究了CI使用者和听力正常(NH)听者在音素类别边界上的光谱对比效应。令人惊讶的是，在CI用户中观察到的对比度效应比在NH听众中观察到的更大，即使当NH听众的光谱分辨率通过声码器处理而受到限制时。结果可能反映了CI用户基于较低的光谱分辨率对光谱提示的不同权重，这反过来可能会增强一些光谱对比度效果。(C)2018年美国声学学会
The identity of a speech sound can be affected by the long-term spectrum of a preceding stimulus. Poor spectral resolution of cochlear implants (CIs) may affect such context effects. Here, spectral contrast effects on a phoneme category boundary were investigated in CI users and normal-hearing (NH) listeners. Surprisingly, larger contrast effects were observed in CI users than in NH listeners, even when spectral resolution in NH listeners was limited via vocoder processing. The results may reflect a different weighting of spectral cues by CI users, based on poorer spectral resolution, which in turn may enhance some spectral contrast effects. (C) 2018 Acoustical Society of America