Vocal tract changes caused by phonation into a tube: A case study using computer tomography and finite-element modeling
Vocal tract changes caused by phonation into a tube: A case study using computer tomography and finite-element modeling
复制标题
DOI：
10.1121/1.3506347
复制
发表时间：
2011-01-01
影响因子：
2.4
通讯作者：
Svec, Jan G.
中科院分区：
文献类型：
--
作者：
Vampola, Tomas;Laukkanen, Anne-Maria;Svec, Jan G.
在玻璃管中发声是一种发声训练和治疗方法，在发声时会产生有益的效果。然而，目前还不知道在发声过程中和发声后声道会发生什么变化。这项初步研究使用计算机断层扫描(CT)检查了一名女性受试者在发声前、发声期间和发声后的声道形状。声道的三维有限元模型(FEMS)是从CT图像中提取的，用于研究声道输入阻抗的变化。在元音[a：]上发声时，数据显示在管状发声过程中和发声后口咽和口腔的横截面积增大，口咽闭合变紧。有限元计算显示，管状发声后，声道的输入惯性增加，从声道辐射出来的声能增加。结果表明，发声进入管子会引起声道的变化，当管子被拔出时，这些变化仍然存在。这些效果可能有助于改善患者和语音专业人士的发声能力。(C)2011年美国声学学会。[DOI：10.1121/1.3506347]
Phonation into a glass tube is a voice training and therapy method that leads to beneficial effects in voice production. It has not been known, however, what changes occur in the vocal tract during and after the phonation into a tube. This pilot study examined the vocal tract shape in a female subject before, during, and after phonation into a tube using computer tomography (CT). Three-dimensional finite-element models (FEMs) of the vocal tract were derived from the CT images and used to study changes in vocal tract input impedance. When phonating on vowel [a:] the data showed tightened velo-pharyngeal closure and enlarged cross-sectional areas of the oropharyngeal and oral cavities during and after the tube-phonation. FEM calculations revealed an increased input inertance of the vocal tract and an increased acoustic energy radiated out of the vocal tract after the tube-phonation. The results indicate that the phonation into a tube causes changes in the vocal tract which remain also when the tube is removed. These effects may help improving voice production in patients and voice professionals. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3506347]