Development of a diagnostic system and a functional therapy for speech disorders of skelwtal malocclusion patients

1.对骨性III类患者术前发音的摩擦音进行分析，并与正常人的声学特征进行比较，发现/S/摩擦音的高频成分低于正常人。在/*/摩擦的情况下，中频成分的水平低于正常受试者。2.利用这些语音样本对摩擦的自然性进行听力测试，以确定声学特征与自然性之间的关系。声级比越低，/S/擦音的自然度越强。3.根据石膏和硅胶制作的声学模型和正常下颌前突受试者的实验结果，讨论了手术后/*/摩擦音的自然度变化的原因。在/S/的情况下，错(牙合)合点的开放面积和弹性可能会影响患者的言语障碍。4.研制了发声过程中颌舌运动的三维测量系统，在6×6×8 mm和4×4×6 mm的范围内，下颌运动测量系统的平均变形为60微米，在4×4×6 mm的区域内平均变形为30微米；在正中矢状面上，舌动测量系统的平均变形为200微米。

The purpose of present study is to make a objective examination system for speech disorder,and to establish a treatment regimen.1.The fricatives pronounced by patients with skeletal class III were analyzed before surgery and the acoustic characteristics were compared with those of normal subjects.In case of /s/ fricatives,the level of high frequency components were lower than that of normal subjects. And in the case of /*/ fricatives,the level of mid frequency components were lower than that of normal subjects.2.Hearing tests with respect to naturality of fricatives were done using these speech samples to determine the relationship between acoustic characteristics and naturality. The naturality of the /s/ fricatives were found to increase when the rate of sound level decreased. On the other hand,the naturality of the /*/ fricatives were found to increase when the rate of sound level increased.3.The reason why the rate changed after surgery was discussed on the basis of experimental results using a plaster and silicone made acoustic model and normal subjects with protruded mandibule. In case of /s/,open area and elasticity of the malocclusion point was expected to influence the speech disorder of patients. In the case of /*/,deformities of the vocal tracts acording to malocclusion was expected to influence the speech disorder of patients.4.The three dimensional measuring system for jaw and tongue movements during phonation was developed.The average distortion of the jaw movement measuring system were 60 mum in a region of 6X6X8mm and 30mum in a region of 4X4X6mm.The average distortion of the tongue movement measuring system was 200 mum in a region of 28X24mm in the midsagital plane.