Master of Arts (MA)


Communication Sciences and Disorders

Document Type



This study aimed to provide selected acoustic data for vowels of one portion of the southern region (Southern LA) in recognition that a variety of Southern dialects have not been recognized on the American English dialect map. To examine dialectical variations in vowel acoustics, this study included a relatively greater number of acoustic parameters including: vowel duration, F1 and F2 from the temporal midpoint of the vowel, trajectory length, and F2 slope. Ten participants between the ages of 18 to 24 were selected from the Southern Louisiana dialect region. Speech stimuli, which have been used in prior research regarding dialect, included words containing 16 American English vowels in /hVd/ context (Hillenbrand, 1995). Each stimulus was produced five times in a row, which results in analysis of a total of 800 vowels (10 speakers, 16 vowels, and 5 repetitions). Based on a general comparison between data from Southern Louisiana dialect speakers and previously reported data from Upper Mid-Western dialect speakers, it can be inferred that there are differences in temporal and spectral measures between these two dialects. This provides a basis for direct comparison of Southern Louisiana dialects to other dialects to determine which parameters are most sensitive to dialect and how these might impact vowel production and perception.



Document Availability at the Time of Submission

Release the entire work immediately for access worldwide.

Committee Chair

Kim, Yunjung