The Impact of Contrastive Stress on Vowel Acoustics and Intelligibility in Dysarthria.
The Impact of Contrastive Stress on Vowel Acoustics and Intelligibility in Dysarthria.
复制标题
对比重音对构音障碍的元音声学和清晰度的影响。
DOI：
10.1044/2016_jslhr-s-15-0291
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发表时间：
2017
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影响因子：
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通讯作者：
Patel,Rupal
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文献类型：
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作者：
Connaghan,KathrynP;Patel,Rupal
目的比较痉挛型失语症患者在对比重音和非对比重音条件下发音时元音的声学特性和可懂度（混合性痉挛）构音障碍继发于脑瘫（DYSCP）和健康对照（HC）。（9例男性，6例女性;年龄M = 42岁），患有DYSCP和15例HC（9名男性，6名女性;年龄M = 36岁）产生的句子含有目标词有和没有对比重音。45名健康的听力者（年龄M = 25岁）完成了DYSCP产品的元音识别任务。使用第一（F1）和第二（F2）共振峰测量，在压力条件和组之间比较元音声学。结果两组受试者的F1和F2在应激条件下均显著增加，但变化程度不同。元音之间的平均欧几里德距离也随着重音的增加而增加。元音落在目标F1 × F2空间的相对概率更大的HC，但没有不同的压力。压力生产导致更大的听众元音识别准确度为扬声器与轻度dysarthria.ConclusionsContrastive压力影响元音共振峰为两组。感知结果表明，一些说话者与构音障碍可能会受益于对比重音策略，以提高元音的可懂度。
PurposeTo compare vowel acoustics and intelligibility in words produced with and without contrastive stress by speakers with spastic (mixed-spastic) dysarthria secondary to cerebral palsy (DYSCP) and healthy controls (HCs).MethodFifteen participants (9 men, 6 women; ageM= 42 years) with DYSCPand 15 HCs (9 men, 6 women; ageM= 36 years) produced sentences containing target words with and without contrastive stress. Forty-five healthy listeners (ageM= 25 years) completed a vowel identification task of DYSCPproductions. Vowel acoustics were compared across stress conditions and groups using 1st (F1) and 2nd (F2) formant measures. Perceptual intelligibility was compared across stress conditions and dysarthria severity.ResultsF1 and F2 significantly increased in stressed words for both groups, although the degree of change differed. Mean Euclidian distance between vowels also increased with stress. The relative probability of vowels falling within the target F1 × F2 space was greater for HCs but did not differ with stress. Stress production resulted in greater listener vowel identification accuracy for speakers with mild dysarthria.ConclusionsContrastive stress affected vowel formants for both groups. Perceptual results suggest that some speakers with dysarthria may benefit from a contrastive stress strategy to improve vowel intelligibility.