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A study of vowel nasalization using instantaneous spectra

机译：瞬时光谱研究元音鼻化研究

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Nasalization of vowels is a phenomenon where the oral and nasal tracts participate simultaneously in the production of speech. Acoustic coupling of the oral and nasal tracts, together with the glottal activity, results in a complex dynamic production system. The extent of coupling determines the degree of nasalization in vowels. Changes in the instantaneous response of the vocal tract system are used to study the effects of co-articulatory load of nasals on vowels. Dominant resonance frequency (DRF) contour is extracted from the instantaneous response of the system to determine the duration of the vowel nasalization. The extent of coupling determines the relative dominance of the oral and nasal resonances during the open and closed phases of a glottal cycle. Larger coupling leads to more decay of the energy of the oral resonances, and hence the vowel spectra exhibit predominantly the nasal resonances characteristics. Comparison with the existing measures show the effectiveness of the proposed measures for determining vowel nasalization. Segments of vowels in the context of nasal consonants from utterances of both male and female speakers of English are used to illustrate different aspects of this study on vowel nasalization.
机译：元音的鼻子化是口腔和鼻道同时参与语音的现象。口腔和鼻腔的声学耦合以及引物活性，导致复杂的动态生产系统。偶联程度决定了元音中的鼻腔化程度。声乐道系统的瞬时反应的变化用于研究鼻腔的共同剖析载荷对元音的影响。从系统的瞬时响应中提取主导共振频率（DRF）轮廓，以确定元音鼻化的持续时间。偶联程度决定了在最小的循环的开放和闭合阶段期间口腔和鼻腔共振的相对优势。较大的耦合导致口腔谐振的能量的更多衰减，因此元音谱主要表现出鼻腔共振特性。与现有措施的比较显示了确定元音鼻化措施的有效性。来自英语男性和女性扬声器的话语的鼻辅音的鼻辅音中的元音分段用于说明本研究的不同方面的元音鼻化。

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