The fronting of the high-back, /u:/ and /U/, as currently seen in Southern British English, is a rare opportunity to study two similar sound changes at different stages of their phonetic development: /u:/-fronting is a more advanced change than /U/-fronting. Since the fronting in both vowels is restricted from applying before a following final /l/, e.g. in words like fool or pull, we can exploit the difference in the phonetic advance- ment of /u:/ and /U/-fronting to illuminate the nature of `fuzzy contrasts', affecting vowel+/l/ sequences in morphologically complex words. As recent results show that /u:/-fronting is partially limited in fool-ing (but not in monomorphemes like hula), we ask whether similar morphological constraints affect /U/ followed by /l/ (e.g. bully vs. pull-ing). Simultaneously, we consider the question of what phonological generalisation best captures the interaction between vowel fronting, /l/-darkening, and morphological structure. We present ultrasound data from 20 speakers of SBE representing two age groups. The data show that morphologically conditioned contrasts are consistent for /u:/+/l/, but variable and limited in size for /U/+/l/. We relate these findings to the debate on morphology-phonetics interactions and the emergence of phonological abstraction.

中文翻译：

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哪来的暧昧？英国南部英语中相互作用声音变化的形态学效应

目前在英国南部英语中看到的高背的前移，/u:/ 和 /U/，是一个难得的机会，可以研究在其语音发展的不同阶段的两种相似的声音变化：/u:/-fronting 是比 /U/-fronting 更高级的更改。由于两个元音的前置都被限制在后面的最后 /l/ 之前应用，例如在像傻瓜或拉这样的词中，我们可以利用 /u:/ 和 /U/-前置的语音推进的差异来说明“模糊对比”的性质，影响形态复杂单词中的元音+/l/序列。由于最近的结果表明 /u:/-fronting 在愚弄中部分受限（但不是在像 hula 这样的单语素中），我们询问类似的形态约束是否影响 /U/ 之后是 /l/（例如欺负与拉动）。同时地，我们考虑什么音韵概括最好地捕捉元音前移、/l/-变暗和形态结构之间的相互作用的问题。我们展示了来自代表两个年龄组的 20 位 SBE 演讲者的超声数据。数据显示 /u:/+/l/ 的形态条件对比是一致的，但 /U/+/l/ 的大小可变且有限。我们将这些发现与关于形态-语音相互作用的辩论和语音抽象的出现联系起来。