A Study of the Vowels of the Tibetan Amdo Dialect Based on Ultrasound Imaging
In this study,physiological speech data of Tibetan Amdo dialect vowels were collected with the aid of an ultrasonic instrument,and the dynamic tongue position and static tongue position of the stabilization segment,as well as the acoustic resonance peak data of the Amdo dialect vowels were systematically analyzed.The experimental results show that there is indeed a stabilization stage during tongue movement,and the differ-ences between the data of all frames in this stage are relatively small.Comparing the tongue characteristics of this stage with those of ancient Tibetan,it is found that the vowel system of the Amdo dialect has already pro-duced certain changes,i.e.,the vowels'tongue position is/a/,/i,u,o/,/e/from low to high,and the tongue position is/e/,/a,i,u/,/o/from front to back,respectively,in which the vowels/i/and/o/are in the same order from low to high.The vowels/i/and/u/have been centralized and produced new phonemic variants.Finally,we provide a general description of the tongue-body postures of vowels in the Amdo dialect from a spatial domain perspective.It is clarified that vowels have unity in physiological manifestation and acous-tic features,which is of theoretical significance and reference value for the study of both pronunciation differ-ences and commonalities among different dialects of Tibetan.
万方数据
维普
