พฤติกรรมค่าความถี่มูลฐานของเสียงสระ อันเนื่องมาจากอิทธิพลของเสียงพยัญชนะต้นและพยัญชนะท้าย ในภาษาเอเชียตะวันออกเฉียงใต้ : นัยสำคัญต่อทฤษฎีกำเนิดวรรณยุกต์ / อมร ทวีศักดิ์ = Fundamental frequency behaviour of vowels influenced by initials and finals in southeast asian languages : implications for tonogenesis theories / Amon Thavisak
The study aims at investigating the behavior of the vowel fundamental frequency value in 8 Southeast Asian Languages – 4 non-register languages: Lavue, Pattani Malay, Urak Lawoi’, and Moken: and 4 register languages: Khum, So, Bru, and Mon. A wordlist was constructed for each language consisting consisting of 16-22 words. Five speakers per language were interviewed and each was pronounced 4 times. Analysis results show that voiceless initials yield higher fundamental frequency value than voiced initials. The finding supports the related proposal in the tonogenesis theory theory. As far as finals are concerned, glottal stop causes both falling and rising-falling contour. This contradicts what the tonogenesis theory proposes. Final glottal fricative yields falling and rising-falling contour. The supports the tonogenesis theory. This study confirms that both aspiration and register related to tonogenesis. There is strong evidence in this study showing that the Nan variety of Khmu is in the process of becoming a tone language.