研究发现发音方式影响元音动态，揭示了语音个性的生理机制。
Articulatory strategy as a source of variation in acoustic vowel dynamics
- 通过超声舌像分析36名说话者发/i/时的舌位策略。
- 舌根或舌背移动越大，元音过渡越早越陡，且与共振峰变化相关。
- 适合语音学、语音识别及个性化声纹研究者阅读。
语音中的元音动态具有一定的说话人特异性，传统观点认为这源于个体独特的发音策略：共振峰过渡的特定形态是由于说话人以特定且熟练的方式移动发音器官所致。然而，现有证据尚不足以证明不同发音策略会系统性地影响共振峰动态。本研究验证了二者间的关联。利用36名北部盎格鲁英语说话者的超声舌像数据，识别出发腭化元音/i/时的不同发音策略。结果表明，/i/中的舌形是带有腭化尾音的双元音共振峰动态的重要预测因子。观察到的关系可由声道形状所制约的发音运动特征解释：舌根和/或舌背的更大位移会导致腭化元音中舌形偏离平均状态更显著，同时需要更高的发音速度，从而引发相对更早、更陡峭的共振峰过渡。该结果深化了对语音个体性中规律性与个体性并存机制的理解。
原文摘要 · Abstract (English)
Acoustic vowel dynamics have some speaker-identifying characteristics, which have been ascribed to individual properties of articulatory strategies: formant transitions have a particular shape because speakers move their articulators, using specific and practised movements. However, there is little existing evidence that different articulatory strategies systematically affect formant dynamics. The present study corroborates the link between the two. Ultrasound tongue imaging data from 36 speakers of Northern-Anglo English are used to identify distinct articulatory strategies for the production of palatal vowel /i/. Tongue shape in /i/ is found to be a significant predictor of formant dynamics in diphthongs with a palatal offglide. The observed relationships can be explained by the characteristics of articulatory movement conditioned by vocal tract shape. Greater articulatory displacement of tongue root and/or dorsum produces greater distortion from the mean tongue shape in palatal vowels, and it also requires higher articulatory velocities, resulting in relatively earlier and steeper formant transitions. The results contribute to the conceptual understanding of individuality in speech, by illuminating the regularising and individual aspects of articulatory compensation.
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