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      Rounding
      發布時間:2018年12月27日     發布人:nanyuzi  
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      Rounding

      圓唇

       

      A term used in the classification of lip position in phonetics, referring to the visual appearance of the lips when they assume a rounded shape. Each of the vowel position on the cardinal vowel diagram has both a rounded and an unrounded form. Lip position is of particular phonological significance in the analysis of vowel and semi-vowel qualities. The opposition rounded/non-rounded has special status in Chomsky and Halle’s distinctive feature theory of phonology, where it handles variations in place of articulation, specifying lip position. ‘Rounded’ sounds are defined articulatorily, as those produced with a narrowing of the lips, as in [w], [u], etc. Its opposite is non-rounded, referring to sounds produced without any such narrowing, as in English front vowels.

       

      語音學用來給唇位分類,指雙唇呈圓唇的外觀?;驹魣D上每個元音位置都有圓唇和不圓唇兩個形式。事實上在分析元音和半元音的音質時,唇位在音系學上有特別重要的意義。圓唇/非圓唇對立在喬姆斯基和哈勒的音系學區別特征理論中有特殊地位,用來描寫發音部位的變異(腔特征),具體是唇位變化?!皥A唇”音從發音上定義為雙唇的間隙收窄,如[w] 、[u]等。相對立的是非圓唇音,指雙唇不這么收窄發出的音,如英語的前元音。

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      在线精品国产一区二区三区,欧美最猛性XXXXX大叫,亚欧美日韩香蕉在线播放视频