The Five Main Vowels Acoustic Analysis of Tibetan Lhasa Dialect

This article mainly analyzes the acoustic characteristics of the Tibetan capital Lhasa dialect vowels (a, i, u, e, o) by using the theory and method of the acoustic phonetics, include three aspects of the data, such as vowel formant frequency, acoustic vowel chart, the fundamental frequency time. The study found: (1) compared with the male, the female student´s opening degree of the mouth in pronunciation is bigger, the tongue position is relatively back, and the Round lip degree is relatively high, (2)Judging from the average length, the pronunciation of vowel i is the longest, u is the shortest, this phenomenon is related to the tongue position before and after, (3) Five main vowel is showing a positive correlation with F1, characterized by a is the largest, followed by o, e, i is the least, Each vowel round lip is negatively related to the F2, namely round lip degree increases with the decreasing of F2, round degree of lip with the back of tongue also gradually improve, characterized by a lip of the circle, tongue is the most, I, on the other hand.