Ryalls J H
Phonetica. 1984;41(2):103-11. doi: 10.1159/000261715.
A set of 9 CVC utterances were elicited five times each from a group of 5 anterior and 7 posterior aphasics. These spoken tokens were acoustically analyzed for the fundamental frequency of phonation and compared to tokens for a group of 7 normal control speakers. Statistical analyses revealed that anterior aphasics produced significantly higher average fundamental frequencies than did normal speakers, and that both groups of aphasics had significantly greater variability (both inter- and intraspeaker) in their fundamental frequency values than did normal speakers. A subset of these data was also analyzed for the period-to-period variation or 'jitter' of the acoustic waveform. Each group was significantly different from each other: posterior aphasics demonstrated the greatest period-to-period variation followed by anterior aphasics and then normal subjects. Some implications of this research are discussed.
从5名前位失语症患者和7名后位失语症患者组成的一组人群中，每次引出一组9个连续语音切分单位（CVC）话语，共进行5次。对这些口语样本进行声学分析，以确定发声的基频，并与7名正常对照说话者的样本进行比较。统计分析表明，前位失语症患者产生的平均基频显著高于正常说话者，并且两组失语症患者在基频值上的变异性（包括说话者之间和说话者内部）均显著大于正常说话者。还对这些数据的一个子集进行了声学波形的逐周期变化或“抖动”分析。每组之间存在显著差异：后位失语症患者表现出最大的逐周期变化，其次是前位失语症患者，然后是正常受试者。本文讨论了这项研究的一些意义。
