I am working on Vietnamese tonal variations and the mismatch between production and perception. In addition, I am interested in variations in articulatory production and perception of speech sound and its implements in speech recognition, as well as dialectal variations of Vietnamese tones and vowels system.

Current Research

In this research, I investigated the vowel space of three different dialects of Vietnamese: Hanoi, Hue and Saigon. The vowel space was mapped based on F1 and F2 values extracted from the total of 2268 tokens of 11 vowels.

The research shows that 7 out of 11 vowels in all three dialects are not overlapped in their vowel space, but the two pairs /a/-/ɐ/ and /ə/-/ʌ/ are overlapped in all three dialects.

Vietnamese Vowel Systems of Hanoi, Hue, & Saigon Dialects

 

This is just a further analysis of the Vietnamese vowel data from my previous project. In this analysis, I looked more closely at two pairs /a/-/ɐ/ and /ə/-/ʌ/ across three dialects, paying attention to their duration differences. The results show that as the distance in formant values of  a/-/ɐ/ and /ə/-/ʌ/ reduces in the direction of Hanoi > Hue-Saigon dialects, the length differences between them increase in the same direction Hanoi > Hue-Saigon.

Duration as a contrastive feature in Vietnamese vowels