Development of computer-aided speech evaluation system modified by the technology of speech recognition

本研究的目的是利用语音识别系统的技术，开发一个计算机辅助语音评价系统。为此目的，有必要确定失真声音的客观分类。在此声学分析之前，必须分析异常声音产生期间的发音运动。在此期间，我们对正常人和头颈癌术后发音障碍者进行了研究，得到以下结果：1-1。MRI三维测量声带形态：（1）参数在正常范围内：（1）变化稳定; (2)手术造成患者声带明显宽而不对称。三维声道模型的有限元分析本文给出了用有限元法估计三维声道模型的声音传递函数。结果表明，该方法比一维模型更实用.下颌舌运动的同步分析采用颌动分析系统和腭电图同步记录。结果表明，中度舌系带过短的成年人在某些语音的清晰度上与正常成年人不同. 1.横向错音的感知及其物理相关性通过对横向错音的声学特性与感知结果的相关性研究，发现利用计算机进行机器自动识别是可行的。

The purpose of this research is to develope the computer-aided speech evaluation system which is modified by the technology of the speech recognition sysytem. For this purpose objective categorization of the distorted sound is neccesary to determine. Prior to this acoustical analysis, articulatory movement during abnormal sound production have to be analysed. During this period normal subjects and articulation disorders after head and neck cancer surgery are investigated.Following results were obtained :1-1. Three dimentional measurements of vocal tract shape using MRI(1) Parameter in the normal range exibited 1) stable change 2) the narrowest portion was centrally located on the palate.(2) The patlents vocal tract have markedwide and asymmetry caused by the surgery.1-2. FEM analyses of Three-Dimentional vocal tract modelsVocal transfer functions of three-dimensional vocal tract models estimated by a finite element method was shown. As a results, this method is more useful than one-dimentional models.2. Simultaneous analysis of mandibular and tongue movementA sirognathograph analysing system and an electropalatograph were used to record simultaneously. As a result, in the adults with moderate ankyloglossla, articulation of some sounds differed from that in the normal adults.3. Perception of Lateral Misarticulation (LM) and its physical correlatesAcoustical characteristics of LM were correlated to perceptional results.From these series of research, it was found that automatic machine recognition by computer is available in future.