Research On Acoustic Rhythm Of Tianzhu Tibetan Folk Songs

This study used the method of acoustic analysis, comparative analysis and statistical analysis, on the basis of parameter base of TianZhu Tibetan folk, and analysis three rhyme metrical unit of TianZhu Tibetan folk.This research finds that prosodic features of drinking song, love song, wailing song, religious song, dance songs such as the length of phrases, words and drawl.fundamental frequency of passages and the energy of phrase and passages are different.The main performance are as follows:The length of speech:different folk songs have different performance in length, and this study finds that the whole time is probably not in order; the phrase time are regular but there is little effect on acoustic style of folk songs; the length of phrases, words and drawl of five different folk song in order of most long, it goes:drinking song, love song, wailing song, religious song, dance songs,the length of the word and drawl can illustrate rhythm speed, the change of rhythm and the gurgitation of rhythm.The fundamental frequency:the fundamental frequency of five different folk song in order of most high, it goes:religious song,dance song,drinking song, wailing song, love song. The change of fundamental frequency in dance song is mild compared with drinking song, The fundamental frequency of cheerful folk changes a lot, there can be high-frequency distribution characteristics and tone range is based on high-toned and wide tone range. The fundamental frequency of sad folk changes far less, there can be low-frequency distribution characteristics and tone range is based on low-toned and narrow tone range. The change of phrase and passages is consistent with overall change. The fundamental frequency and pitch can give an index to emotions of folk.The energy:the energy of five different folk song in order of most high, it goes:religious song,dance song.drinking song, wailing song, love song. The genre of folk can be showed by the average and the distribution range of energy, with the study of the energy of five different folk song, it can be find different average and distribution range of energy reflect the style of folk.The innovation points of this study includes:collect five types of folk songs to make corpus information more perfect and comprehensive. This study compares and analyzes folk songs using the method of acoustic analysis and enhance the motivations of result.