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      Tier
      發布時間:2019年06月04日     發布人:nanyuzi  
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      Tier

      音層

       

      A term in hierarchical models of phonology for a level of phonological representation. For example, in autosegmental phonology, parallel tiers of phonological segments are proposed, each tier consisting of a string of segments, and representing a sequence of articulatory gestures or acoustic transitions. In a tone language, for instance, tones are represented on one tier, which specifies features of tone and nothing else; other (non-tonal) features are represented on a separate tier. Features cannot appear on more than one tier, and thus tiers can be defined by the features found in them, as in the case of the phonemic tier, the skeletal tier and the X-tier. The number of tiers varies between models. In particle phonology, for example, there are five: syllabic, nucleus, timing, root and particle tiers. Terminology varies greatly among different models, as in the case of the tier handling information about articulation, which has been called a ‘featural’, ‘gestural’, ‘melodic’, ‘segmental’ and ‘articulatory’ tier.

       

      音系學的各種層級模型用來指一個音系表征層面。例如自主音段音系學建立兩個平行的音系音段層,每個音層為若干音段組成的語符列并代表一些發音音姿或聲學音渡組成的序列。例如,對于聲調語言,聲調在一個音層上表征,這個音層只標明聲調特征不標明其他特征;其他(非聲調)特征在另一個音層上表征。特征不能在一個以上的音層上出現,因此音層可以用出現在其上的特征來定義,例如音位層、骨架層、X-音層。不同的模型音層的數目不同。例如在粒子音系學中有五個音層:音節層、核心層、時標層、根層、粒子層。不同的模型所用的術語也很不一致,例如處理發音信息的音層有“特征層”、“音姿層”、“節律層”、“音段層”、“發音層”等各種名稱。

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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