Analysis of the oral disfunction caused by jaw facial deformity and development of the inspection system for oral function

1.对手术III级患者和正常受试者的发音(/ASA/)进行FFT分析，计算两帧间的相干系数。作为结果，a)在辅音的情况下，在高频范围内观察到高连贯部分，在元音的情况下，在低频率范围内观察到高连贯部分。2)在声母向韵母的滑行阶段，正常受试者的高连贯性成分由低频平稳地向高频方向转移。但在外科III级患者中，其转移并不顺利。这一次，采取了改进，以扩大测量范围和评估患者的纵向数据。结果表明，该系统的测量范围前后、上下扩展到50 mm，横向扩展到12 mm。经三维变形校正后的测量误差为1.01 mm。-.[)0.89。结果表明，该测量系统能够准确观测舌体运动，并将舌体运动的纵向数据叠加到腭部。选择3例正常人和3例外科III类错牙合患者，观察摩擦音/S/(AsA/、/USU/、/ESE/、/OSO/)发音过程中舌运动的变化。2)患者舌位比正常人低，发声持续时间长。

1. The voice (/asa/) pronounced by the surgical class III patients and normal subjects were analyzed according to FFT method and the coherence between 2 frames were calculated. As a recult, a)the high coherency part was observed in high frequency range in case of the consonant and in low frequency range in case of the vowel. b)at the glide of consonant to vowel, the patr of high coherency was transferring smoothly from low frequency range to high frequency range in normal subjects. But it was not transferring smoothly in the surgical class III patients.2. This time, the improvements were undertaken to magnify the measuring range and to evaluate the patients' longitudinal data. The results have shown that the measuring range of the system expanded up to 50mm antero-posteriorly and superio-inferiorly and up to12mm transversely. The measurement error after correcting for three dimensional distortion was 1.01mm(]SY.+-。[)0.89. The results suggested that the measuring system could observe accurate tongue movement and superimpose the longitudinal data of tongue movement at palatal region.3. Therr normal subjects and three patients who are diagnosed as surgical class III malocclusion were selected to investigate tongue movements during articulation of the fricative /s/ (asa/, /usu/, /ese/, /oso/).From the results of the measuring data, a)faster tongus movements were observed in the parts of glide. b)the patients showed jower tongue position and longer duration to produce the sound source than normal subjects.