A Study On Acoustic Phonetics Of Mongolian Native Speakers' Japanese Vowel Acquisition

This study has mainly completed two aspects of work.Firstly,the acoustic analysis of the phonological data of the Mongolian native speakers' Japanese vowel acquisition and an acoustic parameter library of Mongolian native speakers' Japanese vowel acquisition is established.The second one is based on the relevant parameters of the database,statistical methods such as acoustic spatial distribution maps,single factor analysis of variance(One-Way ANOVA)are used to investigate and clarify the characteristics of Mongolian native speakers' Japanese vowel acquisition,so as to help and reference interlanguage study of Mongolian speakers and their Japanese phonetic teaching.The paper consists of seven parts,including introduction,chapter one,chapter two and chapter three,summary,references and appendix.The introduction part introduces the theories related to second language acquisition,and overview of previous stuty,purpose and significance of research,research methods are also discussed here.Chapter one observes the distribution characteristics of vowels in Mongolian and Japanese through vowel pattern.Then through the comparative analysis of vowel acoustic spatial map,the similarity of vowels in Mongolian and Japanese is determined.It is found that the Japanese vowels /i//i?/,/a//a?/ are similar to Mongolian vowels /i//i?/,/a/ /a?/,Japanese vowels /u//u?/,/o//o?/,/e//e?/ are low similar to Mongolian vowels /u//u?/,/?//??/,/?//??/,Japanese vowels /o//o?/ are different from Mongolian vowels /?//??/.Chapter two is devoted to the characteristics of Mongolian native speaker's Japanese vowel acquisition,which are observed and analyzed by using the methods of vowel acoustic spatial diagram,monophoneme variance analysis and standard calculation.And the following conclusions are drawn:1.In the process of acquiring the Japanese vowel /a/,two native speakers of Mongolian have not fully mastered the Japanese vowel /a/,and six have not yet mastered it.The difficulty of one speaker in the phenomenon of not fully mastered is the degree of articulation,while the difficulty of another speaker lies in the tongue position.In the process of acquiring the Japanese vowel /a?/,one speaker has mastered,six speakers have not mastered,one speaker has not mastered,and the difficulty of the three speakers in the phenomenon of incomplete mastery is the degree of articulation,while the difficulty of three speakers lies in the tongue position.In the process of acquiring the Japanese vowel/i/,one speaker has mastered,three speakers have not mastered,four speakers have not mastered.In the phenomenon of not mastering,the difficulty of one speaker is the degree of articulation,and the difficulty of two speakers lies in the tongue position.In the process of acquiring the Japanese vowel /i?/,two speakers have mastered,three speakers have not fully mastered.In the phenomenon of not mastering,the difficulty of the five speakers is the degree of articulation,while the difficulty of one speaker lies in the tongue positionIn the process of the acquisition of Japanese vowel /u/,four speakers are not fully mastered,four speakers are not yet mastered,and during the acquisition of Japanese vowel/u?/,three speakers,five speakers have not yet mastered.In the case of haven't master vowels /u//u?/ fully,the difficulty of the speaker mainly lies in the tongue position and the roundness of the lips;two speakers,during the acquisition of Japanese vowel /e/,are not fully mastered,six speakers have not yet mastered;one speaker was not fully mastered during the acquisition of Japanese vowel / e?/,seven speakers were not mastered.The difficulty of the speaker in the phenomenon of /e//e?/ not fully mastered lies in the degree of articulation.In the process of acquisition of Japanese vowel /o/,three speakers did not master it completely,while five speakers did not master it.In this phenomenon,the difficulty of one speaker lies in the degree of mouth opening and roundness of lips,while the difficulty of two speakers lies in the degree of mouth opening and tongue position.During the acquisition of Japanese vowel/o?/,three speakers were not fully mastered and five speakers were not mastered.The difficulty of the two speakers in the phenomenon of incomplete mastery is the degree of opening and roundness,while the difficulty of one speaker lies in the size of the opening and the tongue position.2.In the acquisition of Japanese vowels with low similarity to Mongolian vowels,/u//u?/ were unstable in tongue position and not in roundness compared with Mongolian vowels.The learner's /e//e?/ vowel si are maller in degree of articulation than the Japanese vowels/e//e?/,while the learner's /o//o?/ in the degree of articulation and tongue position is larger than Japanese vowel /o//o?/,or pronounce Japanese vowel /o//o?/ as Mongolian vowel /?//??/.These phenomenon can be understood as negative transfer of mother tongue.3.According to this study,Mongolian native speakers have not yet accurately mastered the phenomenon of unvoiced Japanese vowels.The rate of unvoiced /i//u/ vowels of each Japanese learner is no more than 25%.Chapter three analyzes the acquisition of the length of Japanese vowels by Mongolian native speakers and finds that most speakers have not mastered the length of short vowels and long vowels accurately.According to the research data,the pronunciation of Japanese vowel length is too long or too short.The conclusion part summarizes the above results,and puts forward some suggestions for the teaching of Japanese vowels by Mongolian native speakers.