Speech identification based on temporal fine structure cues.
Speech identification based on temporal fine structure cues.
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DOI：
10.1121/1.2918540
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发表时间：
2008-07
期刊：
影响因子：
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通讯作者：
S. Sheft;M. Ardoint;C. Lorenzi
中科院分区：
文献类型：
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作者：
S. Sheft;M. Ardoint;C. Lorenzi
在听力正常的听者中，采用两种旨在去除时间包络（E）线索的语音处理方案，评估了时间精细结构（TFS）线索对辅音识别的贡献。刺激处理元音-辅音-元音语音令牌。从分析信号导出，从一组分析滤波器的输出中提取载波信号。“PM”和“FM”处理方案分别估计每个载波信号的相位调制函数和频率调制函数，并将它们应用于分析滤波器中心频率处的正弦载波。在FM方案中，经处理的信号被进一步限制到分析滤波器带宽。第三个方案只保留每个波段的E线索用于比较。与PM和FM计划处理的刺激被发现是高度可理解的（50-80%正确识别）在各种实验条件下，旨在影响外围听觉过滤后推定的E线索重建。辅音之间的混淆分析表明，TFS线索的贡献是更大的地方比发音方式，而匡威的观察到E线索。两者合计，这些结果表明，TFS线索传达重要的语音信息，这不仅仅是E重建的结果。
The contribution of temporal fine structure (TFS) cues to consonant identification was assessed in normal-hearing listeners with two speech-processing schemes designed to remove temporal envelope (E) cues. Stimuli were processed vowel-consonant-vowel speech tokens. Derived from the analytic signal, carrier signals were extracted from the output of a bank of analysis filters. The "PM" and "FM" processing schemes estimated a phase- and frequency-modulation function, respectively, of each carrier signal and applied them to a sinusoidal carrier at the analysis-filter center frequency. In the FM scheme, processed signals were further restricted to the analysis-filter bandwidth. A third scheme retaining only E cues from each band was used for comparison. Stimuli processed with the PM and FM schemes were found to be highly intelligible (50-80% correct identification) over a variety of experimental conditions designed to affect the putative reconstruction of E cues subsequent to peripheral auditory filtering. Analysis of confusions between consonants showed that the contribution of TFS cues was greater for place than manner of articulation, whereas the converse was observed for E cues. Taken together, these results indicate that TFS cues convey important phonetic information that is not solely a consequence of E reconstruction.