The main objective is to study and a comparative acoustic characteristics study of the tone in the Khorat dialect and the Northeastern dialect in Nonsung, Nonthai, Phimai and Pakthongchai district, Nakhon Ratchasima province, Thailand. The data of the research was recorded from 2 native speakers per district using the Cool Edit Pro program. 60 wordlist of William J. Gedney’s tonebox. The investigation was carried out in two main stages. In the first step, the pattern of tone splits and merges. In the second step, 1,440 test tokens were used to investigate the acoustic characteristics analysis Praat program. The results indicate that Nonsung, Nonthai and Phimai district using Khorat dialect. Two varieties are spoken in Pakthongchai district. The Khorat district has 4 tones, the Northeastern dialect has 6 tones. The pattern of tone splits and merges in Nonsung, Phimai and some area in Nonthai district is A1-3 = DS1-3, A4, B1-3 = C1 = DL1-3 and B4 = C2-4 = DL4 = DS4. The pattern in other area in Nonthai and Pakthongchai spoken Khorat dialect is A1 = DS1-3, A2-4, B1-3 = C1 = DL 123 and B4 = C2-4 = DL4 = DS4. And the pattern of Pakthongchai spoken Northeastern dialect is A1 = DS1-3, A1-2, A4, B1-4, C1, DL 1-3 and C1-3, DL4, DS4.
Kanitha Putthasatien, Nakhon Ratchasima Rajabhat University, Thailand
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