Effect of body position on vocal tract acoustics: Acoustic pharyngometry and vowel formants
Effect of body position on vocal tract acoustics: Acoustic pharyngometry and vowel formants
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DOI：
10.1121/1.4926563
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发表时间：
2015-08-01
影响因子：
2.4
通讯作者：
Austin, Diane
中科院分区：
文献类型：
--
作者：
Vorperian, Houri K.;Kurtzweil, Sara L.;Austin, Diane
通常通过影像学研究来研究语音产生的解剖学基础和发音特征，这些影像学研究通常是在仰卧位下获得的。确定身体朝向重力场的变化是否会改变声道尺寸和语音效果是很重要的。本研究的目的是评估体位（直立或仰卧）对(1)声学咽测量的影响，以及(2)声学测量的基频（F0）和四边形点元音的前四个形成峰频率（F1-F4）。获得了27名年龄在17至35岁之间的男性和女性参与者的数据。声学咽测量显示，体位对体积测量的影响具有统计学意义，仰卧位的数值小于直立位，但长度测量没有变化。元音声学分析结果显示，平卧位置的F0、F3变量以及F1-F2-F3空间中质心到每个角元音的欧氏距离均显著大于直立位置。体位的变化影响声道体积的测量，但不影响声道长度。身体位置也影响了上述的声学变量，但主要的元音共振体被保留了下来。(C) 2015年美国声学学会。
The anatomic basis and articulatory features of speech production are often studied with imaging studies that are typically acquired in the supine body position. It is important to determine if changes in body orientation to the gravitational field alter vocal tract dimensions and speech acoustics. The purpose of this study was to assess the effect of body position (upright versus supine) on (1) oral and pharyngeal measurements derived from acoustic pharyngometry and (2) acoustic measurements of fundamental frequency (F0) and the first four formant frequencies (F1-F4) for the quadrilateral point vowels. Data were obtained for 27 male and female participants, aged 17 to 35 yrs. Acoustic pharyngometry showed a statistically significant effect of body position on volumetric measurements, with smaller values in the supine than upright position, but no changes in length measurements. Acoustic analyses of vowels showed significantly larger values in the supine than upright position for the variables of F0, F3, and the Euclidean distance from the centroid to each corner vowel in the F1-F2-F3 space. Changes in body position affected measurements of vocal tract volume but not length. Body position also affected the aforementioned acoustic variables, but the main vowel formants were preserved. (C) 2015 Acoustical Society of America.