Abstract
This paper is an acoustic phonetic study of vowels in Sora, a Munda language of the Austroasiatic language family. Descriptions here illustrate that the Sora vowel system has six vowels and provide evidence that Sora disyllables have prominence on the second syllable. While the acoustic categorization of vowels is based on formant frequencies, the presence of prominence on the second syllable is shown through temporal features of vowels, including duration, intensity, and fundamental frequency. Additionally, this paper demonstrates that acoustic categorization of vowels in Sora is better in the prominent syllable than in the non-prominent syllable, providing evidence that syllable prominence and vowel quality are correlated in Sora. These acoustic properties of Sora vowels are discussed in relation to the existing debates on vowels and patterns of syllable prominence in Munda languages of India. In this regard, it is noteworthy that Munda languages, in general, lack instrumental studies, and therefore this paper presents significant findings that are undocumented in other Munda languages. These acoustic studies are supported by exploratory statistical modeling and statistical classification methods.
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