Department of Speech Pathology and Audiology, Western Michigan University, Kalamazoo, MI 49008, USA.
J Speech Lang Hear Res. 2010 Feb;53(1):84-99. doi: 10.1044/1092-4388(2009/08-0124). Epub 2009 Nov 30.
The purpose of this study was to evaluate how speaking clearly influences selected acoustic and orofacial kinematic measures associated with diphthong production.
Forty-nine speakers, drawn from the University of Wisconsin X-Ray Microbeam Speech Production Database (J. R. Westbury, 1994), served as participants. Samples of clear and conversational productions of the word combine were extracted for analysis. Analyses included listener ratings of speech clarity and a number of acoustic and articulatory kinematic measures associated with production of the diphthong /aI/.
Key results indicate that speaking clearly is associated with (a) increased duration of diphthong-related acoustic and kinematic events, (b) larger F1 and F2 excursions and associated tongue and mandible movements, and (c) minimal evidence of change in formant transition rate.
Overall, the results suggest that clarity-related changes in diphthong production are accomplished through larger, longer, but not necessarily faster diphthong-related transitions. The clarity-related adjustments in diphthong production observed in this study conform to a simple model that assumes speech clarity arises out of reduced overlap of articulatory gestures.
本研究旨在评估说话清晰程度如何影响与双元音产生相关的选定声学和口面部运动学测量。
本研究的 49 名参与者来自威斯康星大学 X 射线微束言语产生数据库（J. R. Westbury，1994）。提取清晰和会话式的单词组合样本进行分析。分析包括对语音清晰度的听众评分以及与双元音/aɪ/产生相关的一些声学和发音运动学测量。
主要结果表明，说话清晰程度与以下因素相关：（a）与双元音相关的声学和运动学事件的持续时间增加，（b）F1 和 F2 振辐更大，舌部和下颌运动幅度更大，以及（c）构音转换率变化最小。
总体而言，结果表明，双元音产生过程中的清晰度相关变化是通过更大、更长但不一定更快的双元音相关转换来实现的。本研究中观察到的双元音产生的清晰度相关调整符合一种简单的模型，该模型假设语音清晰度源于发音动作的重叠减少。
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