Diphthongal phones found in the Balinese language in Tabanan Regency

The study aimed to investigate the diphthongal phones in the Balinese Language, particularly in Tabanan Regency. Phonological rules related to changes of vowel phones into diphthongal phones were uncovered and have explained factors that induce the changes. Data of this research were in the form of utterances produced by female informants in 10 sub-districts in Tabanan Regency. The data were collected through two kinds of methods, which were the interview method and the observation method. In analyzing the data, the researcher used an extra lingual matching method to analyze factors that induce the changes from vowel phones into diphthongal phones. Based on the result, these changes were induced by both linguistic and nonlinguistic factors. The linguistic factors were acoustic factors, namely frequency and duration, and phonological factors, namely diphthongization and vowel shift. Meanwhile, the nonlinguistic factor was the geographical elevation in which the participants lived.