Department of Linguistics, Northwestern University, Evanston, Illinois 60208, USA
JASA Express Lett. 2021 Apr;1(4):045203. doi: 10.1121/10.0003984.
High front vowels have been shown to undergo two competing forms of acoustic (and articulatory) modulation due to prosodic prominence-(1) hyperarticulation: more extreme high/front articulations under prominence and (2) sonority expansion: more open articulations, allowing more energy to radiate from the mouth. This study explores how these effects translate into listeners' perception of the contrast between the vowels /i/ and /ɪ/. Results show that listeners uniformly expect a hyperarticulated vowel (acoustically) under prominence, and adjust categorization of an F1/F2 continuum accordingly. Results are discussed in relation to production findings and possible accounts of why listeners favor hyperarticulation in perception.
高前元音由于韵律重音会经历两种相互竞争的声学（和发音）调制形式-(1)过度发音：在重音下进行更极端的高/前发音和 (2)音响扩张：更开放的发音，允许更多的能量从口腔辐射出来。本研究探讨了这些效果如何转化为听众对元音 /i/ 和 /ɪ/ 之间对比的感知。结果表明，听众一致期望在重音下听到一个过度发音的元音（在听觉上），并相应地调整 F1/F2 连续体的分类。结果与产生发现进行了讨论，并探讨了为什么听众在感知中更喜欢过度发音的可能原因。
