Deang Language Widely Card Initials, Finals Mother Acoustic

Based on the De' ang Vocaburary Corpus from the Endangered Languages Corpus of Chinese ethnic minorities, the author uses acoustic expreiment to discuss the consonants of the Guangka language and the material includs 410 monosyllabic words, 611 bisyllabic words, 17 trisyllabic words and 6 quadric-syllabic words.In the first part of this paper, the author introduces the phonetic characterics of De' ang language, the division of its dialects and the consonant characterictics of Guangka language. The author treats the Guangka language as an individual of the Mon-Khme language, by comparing and contrasting its consonants with other Mon-Khme languages, the author wants to make a scientific description of its characteristics and get a general idea of its similarities and differences with other languages. The reference Mon-Khme languages includes 4 regional variations of 3 dialect districts of De ' ang language, 6 regional variations of Wa language, 5 regional variations of Bulang language and 4 regional variations of Kemu language.Then, based on the manners of articulation, the author divides the consonants of Guangka language into plosive, affricate, nasal, lateral and tremolo. The author tags them in the corpus and does acoustic analysis on them respectively.The acoustic analysis of the plosive is mainly from two aspects, the VOT and the GAP. The first part is the VOT of the plosive. According to the difference of voiceless and voiced, aspirated and unaspirated, the author divides the consonant of Guangka language into three types, named them voiceless aspirated plosive, voiceless unaspirated plosive and voiced plosive. Combining the numbers of the consonant, the author does analysis on each type respectively and the results are as followings: in Guangka language, the VOT of the voiceless unaspirated plosive is the biggest, the VOT of the voiceless aspirated plosive is the smallest and the VOT of the voiced plosive is minus. So the author suggests the VOT be an important factor in distinguishing different types of plosive and the manner and the place of articulation are the main reasons affecting the length of the VOT. The second part is the GAP of plosive and the findings are as followings:the GAP of the voiceless aspirated plosive is the longest, the second one is the voiceless unaspirated plosive and the voiced plosive is the shortest and this phenomenon can be attributed to the intensity of plosive. The acoustic analysis of the affricate is from the VOT and the GAP as well. By comparing and contrasting the means of the VOT and the length of the GAP between the plosive and the affricative,it shows no difference.The acoustic analysis of the nasal, lateral and tremolo is mainly from the voiceless(or unaspirated) and the unvoiceless(or aspirated). In this paper, the author describes these two types of consonants mentioned above and finds the intensity and lengthes of these consonants in different places in a syllable. From the statistics got from the acoustic experiment and the phonetic map, the author thinks the voiceless( or unaspirated) of nasal and lateral are two different articulation manners.Last, the author discussess two starnge phenomenons in Guangka language, "unvoiced voiced" and "one and a half syllable" . The author finds the plosive and affricate of the Guangka language represented as absolutely voiced, absolutely voiceless, voiced nasal and voiceless nasal and the author thinks the reasons for these four types are not only the artichulation habit and the articulation environment, but also the change of language. To the "one and a half syllable" , the author discusses its formation, percentage and its acoustic characteristics.