Blaney B E, Hewlett N
School of Health Sciences, University of Ulster, Newtownabbey, UK.
Clin Linguist Phon. 2007 Oct;21(10):759-69. doi: 10.1080/02699200701497131.
In a previous study, the authors identified final plosive voicing contrast as the highest single error source in dysarthria associated with Friedreich's Ataxia in a group of Irish English-speaking participants. This study aimed to determine the acoustic features underlying misperceptions of voicing status and implications for clinical management. Words with final plosives were extracted from recordings of ten speakers with Friedreich's Ataxia. Various measures of the syllable rhyme were compared with intelligibility scores. Vowel duration, voicing in the closure, F1 frequency at mid-vowel and a drop in F1 at vowel termination accounted for 58% of the variance in the relevant intelligibility scores, with vowel duration being most heavily implicated. While inappropriate vowel duration is the factor most likely to lead to misperceptions of final plosive voicing status, other factors may overcome its effect. Therapeutic intervention with this population should be based on a comparison of intelligibility assessment with acoustic measurement.
在之前的一项研究中，作者们发现在一组讲爱尔兰英语的参与者中，与弗里德赖希共济失调相关的构音障碍中，词尾爆破音的浊音对比是最高的单一错误来源。本研究旨在确定导致浊音状态误判的声学特征及其对临床管理的影响。从十名患有弗里德赖希共济失调的 speakers 的录音中提取了词尾有爆破音的单词。将音节押韵的各种指标与可懂度分数进行了比较。元音时长、闭塞音中的浊音、元音中部的 F1 频率以及元音结束时 F1 的下降，占相关可懂度分数方差的 58%，其中元音时长的影响最大。虽然不适当的元音时长是最有可能导致词尾爆破音浊音状态误判的因素，但其他因素可能会克服其影响。对这一人群的治疗干预应基于可懂度评估与声学测量的比较。
