Experimental Study Of Vowel Nasalization Based On Two Analytical Methods

The problem of vowel nasalization is an important subject in phonetics.In the process of pronunciation of any language,there will be "mouth and nose coupling" phenomenon,the cavity coupling on the effect of speech is difficult to predict,reflected in different languages and different individuals,physiological characteristics are not the same,the relevant parameters are also varied.In the related research of experimental phonetics,the attention to vowel nasalization was very high,mainly in English and French.There is relatively little research on the problem of vowel nasalization in modern Chinese,and the research on vowel nasalization in modern Chinese dialects is almost blank.However,the voice resources in dialects are very rich,in many dialects,vowel nasalization has assumed the role of establishing phonetic syllones.With the development of experimental speech technology,the study of dialects has also gone deeper.In the dialect of Dongkou in Hunan Province,there are the phenomenon of the opposite of the not-nasal vowel and nasal vowel.Through the experimental study of Dongkou dialect,we can enrich the research results of vowel nasalization in modern Chinese,and deepen the understanding of the acoustic characteristics of vowel nasalization.In this paper,the young male voice and the old male voice collected in the investigation work of "China Chinese And Words Resource Protection Engineering" are the research object,and F1,F2,F3,A1,H1,H1-H1,A1-H2,H1-H2,B1,COG1000.A total of 11 parameters 10104 data,using random forest and Student’s t test research methods,respectively,the acoustic parameters related to vowel nasalization were analyzed.The recognition rate of the voice characteristics of the random forest algorithm is relatively high,and it has a better accuracy rate for distinguishing nasal vowels and non-nasal vowels.The statistical results show that the changes of the acoustic parameters of F1,COG100,F2,F0,B1,F3,H1-H2,H2,A1 and other related acoustic parameters are more consistent with vowel nasalization.The study also found that the amplitude difference after the harmonics in which A1 and A1 are located also reflects the vowel nasalization to a certain extent.