Acoustic Measures of Voice and Physiologic Measures of Autonomic Arousal during Speech as a Function of Cognitive Load.
Acoustic Measures of Voice and Physiologic Measures of Autonomic Arousal during Speech as a Function of Cognitive Load.
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DOI：
10.1016/j.jvoice.2016.10.021
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发表时间：
2017-07
期刊：
影响因子：
--
通讯作者：
Stepp CE
中科院分区：
文献类型：
--
作者：
MacPherson MK;Abur D;Stepp CE
本研究的目的是确定健康成年人的认知负荷状况与自主神经唤醒和发声的测量之间的关系。有远见。16名健康的年轻成年人(8名女性)在两种认知负荷条件下产生了一个包含嵌入Stroop任务的句子：一致和不一致。在这两种情况下，参与者都说出了颜色词的字体颜色，而不是文字。在不一致条件下，字体颜色与单词文本不同，相对于字体颜色与单词文本匹配的一致条件，造成认知负荷的增加。在每个认知负荷条件下，分析了自主神经唤醒的三个生理指标(脉搏体积幅度、脉冲周期和皮肤电导反应幅度)和语音的四个声学指标(声压级、基频、倒谱峰值突显度和低/高谱能量比)。建立Logistic回归模型，以被试为范畴预测变量，三个自主测量和四个声学测量为连续预测变量，对认知负荷状况(一致或不一致)进行预测。研究发现，三个变量与认知负荷状况显著相关：皮肤电导反应幅度、倒谱峰值突度和低/高光谱能量比。在认知负荷增加的语音过程中，健康的年轻人表现出自主神经唤醒增强的生理标志和声音质量的声学指标的变化。未来的工作是必要的，以检查这些措施在老年人和个人的声音障碍。
The purpose of this study was to determine the relationship among cognitive load condition and measures of autonomic arousal and voice production in healthy adults. Prospective. Sixteen healthy young adults (eight females) produced a sentence containing an embedded Stroop task in each of two cognitive load conditions: congruent and incongruent. In both conditions, participants said the font color of the color words instead of the word text. In the incongruent condition, font color differed from the word text, creating an increase in cognitive load relative to the congruent condition in which font color and word text matched. Three physiologic measures of autonomic arousal (pulse volume amplitude, pulse period, and skin conductance response amplitude) and four acoustic measures of voice (sound pressure level, fundamental frequency, cepstral peak prominence, and low-to-high spectral energy ratio) were analyzed for eight sentence productions in each cognitive load condition per participant. A logistic regression model was constructed to predict the cognitive load condition (congruent or incongruent) using subject as a categorical predictor and the three autonomic measures and four acoustic measures as continuous predictors. It revealed that three variables were significantly associated with cognitive load condition: skin conductance response amplitude, cepstral peak prominence, and the low-to-high spectral energy ratio. During speech produced under increased cognitive load, healthy young adults show changes in physiologic markers of heightened autonomic arousal and acoustic measures of voice quality. Future work is necessary to examine these measures in older adults and individuals with voice disorders.
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