Erasmus I, van der Merwe A, Groenewald E
Department of Spraakheelkunde en Oudiologie, Universiteit van Pretoria.
S Afr J Commun Disord. 1993;40:85-96.
Speech sound distortion is considered to be a salient feature of neuromotor speech disorders such as cerebellar dysarthria and apraxia of speech. The aim of this study was to compare the temporal and spatial aspects of speech of two persons with acquired cerebellar dysarthria and of one person with acquired apraxia of speech. Voice onset time of [d], duration of articulatory closure of [d], duration of [s] and [l], formants of [l] and the range of acoustic energy of [s] were analysed spectrographically in a number of utterances with various sound structures. The results indicated that spatial and temporal distortion of articulatory movements occurred in all three subjects. However, differences in the nature and degree of speech sound distortion in the two different disorders were observed. The theoretical implications of these differences are discussed with reference to a model of normal speech production.
语音失真被认为是神经运动性言语障碍（如小脑性构音障碍和言语失用症）的一个显著特征。本研究的目的是比较两名后天性小脑性构音障碍患者和一名后天性言语失用症患者言语的时间和空间特征。在一系列具有不同语音结构的话语中，通过频谱分析[d]的语音起始时间、[d]的发音闭合持续时间、[s]和[l]的持续时间、[l]的共振峰以及[s]的声能范围。结果表明，所有三名受试者都出现了发音运动的空间和时间失真。然而，观察到两种不同障碍在语音失真的性质和程度上存在差异。参照正常言语产生模型讨论了这些差异的理论意义。
