The resolution of complex spectral patterns by cochlear implant and normal-hearing listeners
The resolution of complex spectral patterns by cochlear implant and normal-hearing listeners
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DOI：
10.1121/1.1561900
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发表时间：
2003-05-01
影响因子：
2.4
通讯作者：
Turner, CW
中科院分区：
文献类型：
--
作者：
Henry, BA;Turner, CW
研究了在相同通道数(12个)下，人工耳蜗(CI)听者与听力正常(NH)听者在频谱形状分辨能力上的差异。此外，还考察了通道数对光谱形状分辨率的影响。刺激是具有不同纹波频率间隔的纹波噪声信号。使用自适应4IFC程序来确定可分辨波纹间隔的阈值，可分辨波纹间隔是可以区分峰和谷位置的互换的间隔。结果表明，CI的频谱形状分辨率低于NH听者(平均阈值分别约为3000和400赫兹)，并且CI听者之间的差异很大(范围约为800至8006赫兹)。频谱形状分辨率与元音识别之间存在显著的相关性。NH听者的频谱形状分辨阈值随着声道数从1增加到16而增加，而CI听者在4~6声道表现出平台期，这与使用语音识别测量的结果是一致的。这些结果表明，这项测试可以提供一种省时且非语言的CI表现测量，因此，如果得到验证，可能会为使用CI的成人和儿童的言语感知预测提供有用的贡献。(C)2003年美国声学学会。
The differences in spectral shape resolution abilities among cochlear implant (CI) listeners, and between CI and normal-hearing (NH) listeners; when listening with the same number of channels (12), was investigated. In addition, the effect of the number of channels on spectral shape resolution was examined. The stimuli were rippled noise signals with various ripple frequency-spacings. An adaptive 4IFC procedure was used to determine the threshold for resolvable ripple spacing, which was the spacing at which an interchange in peak and valley positions could be discriminated. The results showed poorer spectral shape resolution in CI compared to NH listeners (average thresholds of approximately 3000 and 400 Hz, respectively), and wide variability among CI listeners (range of approximately 800 to 8006 Hz). There was a significant relationship between spectral shape resolution and vowel recognition. The spectral shape resolution thresholds of NH listeners increased as the number of channels increased from 1 to 16, while the CI listeners showed a performance plateau at 4-6 channels, which is consistent with previous results using speech recognition measures. These results indicate that this test may provide a measure of CI performance which is time efficient and non-linguistic, and therefore, if verified, may provide a useful contribution to the prediction of speech perception in adults and children who use CIs. (C) 2003 Acoustical Society of America.