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This paper takes the affricate of Tibetan Yushu dialect as the research object, and uses the acoustic experimental method to extract, analyze and summarize the acoustic parameters such as duration, center of gravity and dispersion, so as to describe the acoustic characteristics of the affricate of Yushu dialect. Firstly, the experiment uses the recording software Audition3.0 single channel adopts voice signal; Secondly, Matlab voice cutting program is used to generate a voice signal corresponding to a single name and voice; Then Praat is used to extract and analyze the parameters. It is concluded that the mean value of voice onset time can clearly distinguish the aspirated and unaspirated affricate of Yushu dialect; The more backward the pronunciation position is, the smaller the voice onset time duration is; The voice onset time value range of voiced affricate is larger than that of unvoiced affricate, and the voice onset time value range decreases with the back of the pronunciation part; The farther back the pronunciation part is, the longer the affricate time is; Compared with the unvoiced affricate, the center of gravity and dispersion of the voiced fricative spectrum are larger.
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