Research On The Acoustic Rhythm Of Yushu Zhuowu

Yushu Tibetan Autonomous Prefecture,as the common source of the three rivers(the Yangtze River,the Yellow River,and the Lancang River),has been known as the "Chinese Water Tower".There are lots of rich Tibetan songs and dances culture here.It has a wide and vaious forms,and all-encompassing content.Therefore,the Yushu Tibetan Autonomous Prefecture is famous for the hometown of Tibetan songs and dances.This thesis analyzes the acoustic analysis of the lyrics and melody characteristics of the three Zhuo dances in Yushu area from the perspective of experimental phonetics,mainly from fundamental frequency and energy,duration,etc.acoustic perspects.After analyzing Zhuo dances in Yushu from acoustic perspects,we can safely figure out the the special acoustic feature.From the perspective of the fundamental frequency of rhythm,the fundamental frequency of Yushu "Zhuo" dance is lower than that of Yushu folk songs.The music trend of Xinsaijianaqiu’s "Zhuo" dance basically presents a stepped form.Moreover,there is a drag cavity that lasts about 3-9s in the phrase and at the end.There are short tremolos lasting about 2-4s in the phrase and at the end of the phrase called Duobailong “Zhuo”Dance.Nangqian Drogma’s music and phrase duration are short,the fundamental frequency is low,and the vibrato fluctuates little.From the perspective of energy,the "Zhuo" dance called "Chengduo Bailong" and the "Zhuo" dance of Xinsaijiana,whose energy rises first and then falls,basically show an arching trend.The energy of "Zhuo" dance in Xinsaijia Naqiu is almost in the high frequency band.Except for "Snow Mountain",the rest of the energy averages between 61.72 d B and 66.67 d B.The sound wave energy is stronger,and the sound intensity is greater.The energy of "Snow Mountain" is basically in a low frequency state,and the overall energy is in a balanced state,with an average value of 54.41 d B.The sound wave energy is relatively weak,and the sound intensity is small.Chengduo bailong “Zhuo” dance’s energy average is basically 61 d B to 62 d B.The energy trend of the overall energy reflects the range of sound intensity and volume.It can show the rhythmic changes of the Adagio,the Middle and Allegro,and the musical structure is complete.The energy trend of Nangqian Zhuogema presents an arched trend,the sound wave energy is weak,the energy duration is short,and the average energy is45.90 d B to 50.7d B.With the transformation of rhythmic emotion,the energy moves towards a balanced state,and the volume is crisp.In terms of duration,among the three “Zhuo” dances,the phrase and music duration of the Xin Saijia Na Qiu “Zhuo”Dance is the longest,and the duration of the phrase is basically between 30-2s,and the first phrase of each phrase has the longest duration,and the third to the Forth phrase duration is the shortest,and the duration of the phrase in the middle part is basically stable,with obvious regularity.The duration of the phrase and music of Chengduo Bailong Zhuo Dance is shorter than that of Xinsaijianaqiu “Zhuo”Dance.The duration of the phrase is basically in the middle of27-5s,but the structure of the phrase duration is the same.The phrase duration of Nangqian zhuogema is short,and the phrase duration is basically between 10-2s.