This study is an acoustic phonetic analysis of Brazilian Portuguese English (BPE) vowels produced by seven Brazilian students. The research was carried out in the Spring of 2016 when the participants, mostly exchange students, were in their last semester of study in the United States after an average length of residency (LOR) of 19.71 months at St. Cloud State University. They were recorded producing the 11 vowel phonemes of American English. The main findings are that four vowels in particular – [ ɪ, æ, ʌ, ʊ] – interfere with intelligibility the most. The participants’ inability to produce these vowels intelligibly has a cascading masking effect on their entire L2 English vowel system, thereby affecting the intelligibility of other vowels. The corpus on which the findings are based consists of 1,386 tokens. Even though six acoustic correlates –F0, F1, F2, F3, Intensity, Duration –were investigated, only F1 and F2 were used to assess intelligibility and to build comparative acoustic vowel spaces.
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Koffi, Ettien and Ribeiro, Lillian Duarte
"The Acoustic Correlates of Brazilian Portuguese-Accented English Vowels,"
Linguistic Portfolios: Vol. 7
, Article 10.
Available at: http://repository.stcloudstate.edu/stcloud_ling/vol7/iss1/10