The importance of word-final vowel duration for non-native portuguese speaker identification by means of support vector machines
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Data
2014
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Resumo
This article studies the acoustic characteristics of some oral vowels in
tonic syllables of Brazilian Portuguese (BP) and which acoustic features are important
for classifying native versus non-native speakers of BP. We recorded native and
non-native speakers of BP for the purpose of the acoustic analysis of the vowels [a],
[i], and [u] in tonic syllables. We analyzed the acoustic parameters of each segment
using the Support Vector Machines algorithm to identify to which group, native
or non-native, a new speaker belongs. When all of the variables were considered, a
precision of 91% was obtained. The two most important acoustic cues to determine
if a speaker is native or non-native were the durations of [i] and [u] in a word-final
position. These findings can contribute to BP speaker identification as well as to
the teaching of the pronunciation of Portuguese as a foreign language.
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Palavras-chave
Phonetics, Acoustic phonetics, Second language acquisition, Brazilian portuguese, Vowels, Support vector machines, Fonética, Fonética acústica, Aquisição de segunda língua, Português brasileiro, Vogais, Máquinas de vetores suporte
Citação
FRANKS, Suzanne; BARBOSA, Rommel. The importance of word-final vowel duration for non-native portuguese speaker identification by means of support vector machines. Revista Brasileira de Linguística Aplicada, Belo Horizonte, v. 14, n. 3, p. 689-712, 2014.