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.

翻译：声学元音动态具有一些说话人识别特征，这些特征被归因于发音策略的个体特性：共振峰转换具有特定形状，因为说话人使用特定且熟练的动作移动其发音器官。然而，目前鲜有证据表明不同的发音策略会系统性影响共振峰动态。本研究证实了两者之间的联系。利用来自36位北英英语说话人的超声舌成像数据，识别出膺元音/i/发音的不同发音策略。研究发现，/i/中的舌形是带有膺化滑音的双元音中共振峰动态的重要预测因子。观察到的关系可以通过声道形状制约下的发音运动特性来解释。舌根和/或舌背的发音位移越大，膺元音中舌形与平均舌形的偏差就越大，同时也需要更高的发音速度，从而导致共振峰转换出现得更早且更陡峭。这些结果通过阐明发音补偿的规律性与个体性方面，有助于从概念上理解语音的个体差异。