在频谱降级条件下识别中断的句子。
Recognition of interrupted sentences under conditions of spectral degradation.
机构信息
Cochlear Implants and Psychophysics Laboratory, Department of Hearing and Speech Sciences, The University of Maryland, College Park, Maryland 20742, USA.
出版信息
J Acoust Soc Am. 2010 Feb;127(2):EL37-41. doi: 10.1121/1.3284544.
Abstract
Cochlear implant (CI) and normally hearing (NH) listeners' recognition of periodically interrupted sentences was investigated. CI listeners' scores declined drastically when the sentences were interrupted. The NH listeners showed a significant decline in performance with increasing spectral degradation using CI-simulated, noise-band-vocoded speech. It is inferred that the success of top-down processes necessary for the perceptual reconstruction of interrupted speech is limited by even mild degradations of the bottom-up information stream (16 and 24 band processing). A hypothesis that the natural voice-pitch variations in speech would help in the perceptual reconstruction of the sentences was not supported by experimental results.
摘要
研究了人工耳蜗（CI）植入者和正常听力（NH）者对周期性中断句子的识别。当句子中断时，CI 听者的得分急剧下降。使用 CI 模拟的噪声带编码语音，随着频谱退化程度的增加，NH 听者的表现明显下降。可以推断，即使是对自下而上信息流的轻微降级（16 带和 24 带处理），也会限制用于中断语音感知重建的自上而下过程的成功。实验结果不支持这样一种假设，即语音中的自然音高变化有助于句子的感知重建。
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