Articulatory Characteristics of Speakers with Motor Speech Disorder

本研究试图发展的发音特征的扬声器与言语失用症（以下简称AOS），运动性言语障碍，使用X射线微束数据从X射线微束语音生产数据库（以下简称XRMB-SPD）和扬声器与AOS的描述。本研究的特点是多扬声器的规范性数据，使正常的清晰度范围的估计和使用三种不同的说话速率，提供了描述的影响，说话速率对清晰度和比较两组之间的可比语音速率。由于基于咬合架速度的参数与坐标无关，因此采用了基于咬合架速度的参数。对下唇和下颌，计算每次重复的速度峰值数、平均峰值速度、主要速度峰值数、平均主要峰值速度和总移动距离，观察到速度峰值数和平均峰值速度受语速的影响，而主要速度峰值数和平均主要峰值速度似乎与语速无关，这表明后两个参数可能与发音的语音内容有关。我们的初步分析表明，主要的速度峰值出现在特定的时间位置的话语，开放的可能性，描述发音时间使用这些峰值。AOS扬声器的性能被认为是与正常扬声器说话缓慢，大多数的参数检查，突出占语音速率的影响，在描述发音特征的语音紊乱的重要性。

The present study attempted to develop descriptions of articulatory characteristics of speakers with apraxia of speech (hereafter AOS), a motor speech disorder, using X-ray microbeam data from the X-ray microbeam speech production database (hereafter XRMB-SPD) and of speakers with AOS. The present study is characterized by multi-speaker normative data that enabled estimation of range of normal articulation and the use of three different speaking rates that afforded description of the effect of speaking rate on articulation and comparison between the two groups in comparable speech rate. Parameters based on articulator speed were employed because of their coordinate-independent nature. For the lower lip and the jaw, number of speed peaks, mean peak speed, number of major speed peaks, mean major peak speed, and total distance travelled, were calculated for each repetition.Effects of speech rate were observed in the number of speed peaks and mean peak speed, while the number of major speed peaks and mean major peak speed appeared to be independent of speech rate, suggesting that the latter two parameters may be related to the phonetic content of utterance. Our preliminary analysis revealed that major speed peaks appeared in particular temporal locations in the utterance, opening the possibility of describing articulatory timing using these peaks. The performances of the AOS speakers were found to be comparable with those of normal speakers speaking slowly, for most of the parameters examined, highlighting the importance of accounting for the effect of speech rate in the description of articulatory characteristics of disordered speech.