%0 Journal Article
%T QUASI-STEADY FLUID FIELD DISTRIBUTIONS IN STATIC LARYNX AND HEMILARYNX MODEL<br>全喉与半喉模型声门区内准稳态流场分布研究
%A LI Sheng
%A WAN Ming-xi
%A WANG Su-pin
%A HU Hai-jun
%A NIU Hai-jun
%A WU Hui-hui
%A <br>李盛
%A 万明习
%A 王素品
%A 胡海军
%A 牛海军
%A 武慧慧
%J 生物物理学报
%D 2004
%I 
%X The research on p honation of asymmetric vocal fold will help to expend the study from normal voice to pathology, which will form the basis of voice rehabi litation. A physical model with embedded and movable glottal structure was used to study the distribution of quasi-steady fluid fields and their relationship with vocal phonation parameter for the transglottal pressure of 100,500,1000 and 1500 Pa in larynx and hemilarynx respecti vely. The minimal glottal diameter was held constant at 0.0402 cm. Thr ee-dimensional finite element method was also adopted to simulate the fluid field distributions under the conditions shown above, the experim ent data were supported well by computational results. Results show th at there are components of asymmetric pressure and velocity in symmetr ic structure, but this portion affect normal phonation little due to its limited ratio (less than 10%). For the asymmetric structure, the ma in reason of reduction in vocal efficiency is the facts caused by ve ry high asymmetric pressure at the entrance of glottal (1.3 times of transglottal), such as emergence of oblique fluid and vortex, lag of their separation point locations, enlargement of separate domain, diminu tion of proportion of transglottal pressures between glottal inlet and outlet in transglottal pressure (average in 30%), weakening of change degree of fluid field, and the wastage of energy caused by them. Th e research suggests that the project of the voice rehabilitation must try to satisfy the principle of symmetric construction.
%K Asymmetric vocal folds
%K Hemilarynx model
%K Fluid field distribution
%K Phonation parameter<br>非对称声带
%K 半喉模型
%K 流场分布
%K 发声参量
%K 病理语音
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=E0C9D9BBED813D6674AC13E942EAC86D&aid=96AF2FEE142043A5&yid=D0E58B75BFD8E51C&vid=A04140E723CB732E&iid=CA4FD0336C81A37A&sid=11B4E5CC8CDD3201&eid=8BD23BD67BF01A5C&journal_id=1000-6737&journal_name=生物物理学报&referenced_num=0&reference_num=31