Pharyngeal articulation in the production of voiced and voiceless fricatives
Pharyngeal articulation in the production of voiced and voiceless fricatives
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DOI：
10.1121/1.3299199
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发表时间：
2010-03-01
影响因子：
2.4
通讯作者：
Iskarous, Khalil
中科院分区：
文献类型：
--
作者：
Proctor, Michael I.;Shadle, Christine H.;Iskarous, Khalil
结构磁共振成像研究表明，在英语摩擦音的产生过程中，咽部清晰度随清音的变化而变化。在一项对四个说美式英语的人的研究中，我们发现在产生持续的浊摩擦音的过程中，咽部的体积通常比无浊摩擦音的大。虽然浊塞音的咽部扩张是意料之中的，但浊擦音的咽部扩张更令人惊讶。对于三个扬声器，所有四个有声的口头摩擦音的生产与更大的咽比，在生产过程中使用的无声摩擦音在同一地方的发音。对于一个扬声器，在生产过程中的无齿唇摩擦音的咽部体积被发现是更大的，和咝咝声咽部的体积变化与声乐的背景，以及发声。咽部扩张主要是通过上咽前壁和侧壁的向前位移实现的，但也观察到咽后壁的一些位移。这些结果表明，浊摩擦音的生产涉及到复杂的相互作用的发音约束从三个独立的目标：形成适当的口腔收缩，控制气流通过收缩，以实现摩擦，和维护声门振荡出席跨声门压力。(C)2010年美国声学学会。[DOI：10.1121/1.3299199]
A structural magnetic resonance imaging study has revealed that pharyngeal articulation varies considerably with voicing during the production of English fricatives. In a study of four speakers of American English, pharyngeal volume was generally found to be greater during the production of sustained voiced fricatives, compared to voiceless equivalents. Though pharyngeal expansion is expected for voiced stops, it is more surprising for voiced fricatives. For three speakers, all four voiced oral fricatives were produced with a larger pharynx than that used during the production of the voiceless fricative at the same place of articulation. For one speaker, pharyngeal volume during the production of voiceless labial fricatives was found to be greater, and sibilant pharyngeal volume varied with vocalic context as well as voicing. Pharyngeal expansion was primarily achieved through forward displacement of the anterior and lateral walls of the upper pharynx, but some displacement of the rear pharyngeal wall was also observed. These results suggest that the production of voiced fricatives involves the complex interaction of articulatory constraints from three separate goals: the formation of the appropriate oral constriction, the control of airflow through the constriction so as to achieve frication, and the maintenance of glottal oscillation by attending to transglottal pressure. (C) 2010 Acoustical Society of America. [DOI: 10.1121/1.3299199]