中古牙喉音开合口在《等子》一系韵图中的演变

On the Evolution of the Medium Ancient Teeth- guttural Sound Open- Closed Mouth in the Series of Rhyming Pictures《Dengzi》

中古以来,牙喉音及其开合口发生了很多变化,《四声等子》和《经史正音切韵指南》,是前期韵图《韵镜》、《七音略》等的进一步发展,从它们所反映出的音系性质来看,它们在韵图中表现出了不同于《切韵》音系的特点,说明已突破了《切韵》音系的范围,真正反映了当时的实际语音,反映了语音的历史变化。本文具体分析了这些变化,找出其中对应的规律,并分析了变化的主要原因。

Since the medium and ancient times, the teeth-guttural sound and its open-closed mouth have changed a lot, 《Four-sound Dengzi》and 《The guide of Orthoepy 》are the further development of the previous rhyming picture 《Rhyming Mirror》,《Seven-sound Scheme》. From the perspective of the nature of sound system reflected, they showed different characteristics with 《Keeping Rhythm》in the rhyming picture, which indicated that they had broken through the scope of the sound system《Keeping Rhythm》, really reflected the practical phonetics at that time, and reflected the historical change of the phonetics. This paper analyzes these changes in details, finds out its regulations, and analyzes the main causes of the changes.