论文标题
使用瞬时光谱研究元音鼻腔化的研究
A study of vowel nasalization using instantaneous spectra
论文作者
论文摘要
元音的鼻腔化是一种现象，口头和鼻腔同时参与语音的产生。口腔和鼻腔的声学耦合导致复杂的生产系统，该系统经历了持续的变化，这归因于震颤活性。鉴定元音中的鼻腔化持续时间以及口头和鼻腔耦合的程度是一项艰巨的任务。本研究的重点是瞬时声道系统的响应变化，以研究鼻腔对元音的co-明显负载的影响。源自光谱的显性共振频率（DRF）轮廓说明了鼻腔化过程中口服和鼻共振的贡献。耦合的程度决定了在闭合开放和封闭相期间这些共振的主导地位。更高的范围会导致口服共振的能量衰减，因此元音光谱表现出主要的鼻共振。与先前建议的度量进行了比较。在男性和女性英语的英语鼻音辅音中，元音辅音的几个示例用于说明拟议的分析方法的不同方面。
Nasalization of vowels is a phenomenon where oral and nasal tracts participate simultaneously for the production of speech. Acoustic coupling of oral and nasal tracts results in a complex production system, which is subjected to a continuous changes owing to glottal activity. Identification of the duration of nasalization in vowels, and the extent of coupling of oral and nasal tracts, is a challenging task. The present research focuses on the changes in instantaneous vocal tract system response to study the effects of co--articulatory load of nasals on vowels. The dominant resonance frequency (DRF) contour derived from the spectra illustrates the contribution of oral and nasal resonances during nasalization. The extent of coupling determines the dominance of these resonances during glottal open and closed phases. A higher extent leads to more decay of energy for the oral resonances, and hence the vowel spectra exhibits a dominant nasal resonance. A comparison of the proposed parameters is made with the previously suggested measures. Several examples of segments of vowels in the context of nasal consonants for English language for both male and female speakers of English are used to illustrate different aspects of the proposed analysis method.
