Kim Yunjung
Department of Communication Sciences and Disorders, Louisiana State University, Baton Rouge, LA, USA.
Clin Arch Commun Disord. 2017;2(1):7-14. doi: 10.21849/cacd.2016.00080. Epub 2017 Apr 30.
This study investigated acoustic characteristics of fricatives produced in a repeated syllables task by speakers with Parkinson's disease (PD), focusing on temporal, intensity, and spectral moment analyses.
Ten participants with PD and nine neurologically-healthy participants were asked to repeat the two words, and , ten times in a row and at a comfortable rate. Acoustic measurements were made for of spectral moments for the fricatives.
Results indicated a varying effect of duration difference between group, with marginally shorter duration of fricatives but much shorter duration of vowels in speakers with PD, as compared to controls; comparable vowel-fricative intensity differences for the two groups; and for the group with PD relatively intact coarticulation throughout fricative.
The findings suggest considering the complex effect of overall speech rate on different kinds of segments in PD. The findings also have implications for speech stimuli in research on coarticulation.
本研究调查了帕金森病（PD）患者在重复音节任务中产生的擦音的声学特征，重点是时间、强度和频谱矩分析。
10名PD患者和9名神经健康的参与者被要求以舒适的语速连续重复两个单词“ ”和“ ”各10次。对擦音的频谱矩进行声学测量。
结果表明，组间持续时间差异有不同影响，与对照组相比，PD患者擦音持续时间略短，但元音持续时间短得多；两组的元音-擦音强度差异相当；PD组在整个擦音过程中协同发音相对完整。
研究结果表明，需要考虑整体语速对PD患者不同类型音段的复杂影响。这些发现对协同发音研究中的语音刺激也有启示。
