INTELLIGIBILITY ASSESSMENT IN DYSARTHRIA

许多神经系统疾病导致语言障碍 （构音障碍）。 构音障碍最重要的方面是它的 影响可理解性。 这个项目研究了 与五种神经系统疾病有关的构音障碍 肌萎缩侧索硬化症，帕金森病，上或下 运动神经元损伤由于中风，脑瘫，小脑 退化 这些构音障碍患者的可懂度降低， 通过多种技术的组合进行研究，包括单个单词 可懂度测试，旨在产生声学语音特征， 语音错误模式，选定测试的声学特征分析 单词，句子重复和会话的声学分析 用数字信号校正特定构音障碍误差的样品 处理，通过语音合成模拟构音障碍，以及x- X线微束研究语言清晰度 构音障碍患者 这些研究的首要假设是 不同的构音障碍可以通过 19个语音特征。 的组合 研究技术测试这些特征的证据， 各种水平，包括感知、声音信号和 发音模式 研究还计划在 口腔感觉测试的发展和完善， 静态和动态皮肤敏感性、振动敏感性，以及 唇和颌本体感觉。 这一长期目标 研究包括（1）改善构音障碍的描述，（2） 语言和口腔感觉评估的改进方法 功能;（3）构音障碍的新理论解释 基于感知、声学和发音数据。

Many neurologic disorders result in a speech impairment (dysarthria). The most important dimension of a dysarthria is its effect on intelligibility. This project examines the intelligibility of the dysarthria associated with five neurologic disorders-- amyotrophic lateral sclerosis, Parkinson's disease, upper or lower motoneuron lesion due to stroke, cerebral palsy, and cerebellar degeneration. Intelligibility reduction in these dysarthrias is studied by a combination of techniques, including single-word intelligibility tests designed to yield acoustic-phonetic profiles of speech error patterns, acoustic signature analyses of selected test words, acoustic analyses of sentence repetition and conversational samples, correction of specific dysarthric errors by digital signal processing, simulations of dysarthria by speech synthesis, and x- ray microbeam studies of speech articulation in selected dysarthric patients. An overarching hypothesis for these studies is that different dysarthrias can be distinctively profiled with respect to 19 acoustic-phonetic features. The combination of research techniques tests for evidence of these features at various levels, including perception, acoustic signal and articulatory pattern. Research also is planned on the development and refinement of an oral sensation test based on static and kinetic cutaneous sensitivity, vibratory sensitivity, and lip and jaw proprioception. The long-term objectives of this research include (1) improved descriptions of dysarthria, (2) refined methods for evaluation of speech and oral sensory function, and (3) new theoretical interpretations of dysarthria based on perceptual, acoustic and articulatory data.