| This article is targeted in tone voice acoustic analysis perception for third tone and third tone sandhi. The experiment subjects are divided into three levels, which are primary, middle and advanced level. The test has two phases. The first phase aims to test the subjects’phonetic perception situation of bias error for Chinese third tone and third tone sandhi changes, which can compare the difference between Thai students and Chinese students on third tone and third tone sandhi. And correction method will be put forward which guides the teaching practice.As the experiment showed, different level students have difference in perception of pronunciation. Furthermore, the difference of accuracy of perception will affect the accuracy of students’Chinese tones learning.Through the analysis of phonetic survey, the problem of learning third tone for Thai students can be found. Mother tongue’s negative transfer is the main reason to lead the bias error on third tone and third tone sandhi for them. The target language interference, mastery degree of Chinese phonetic system, teachers’teaching method and textbook are also the reasons. Finally, the text concludes the teaching advice of Chinese third tone and third tone sandhi and applies in teaching Thai students. |