Análise fonético-acústica das vogais orais e nasais do português: Brasil e Portugal
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2013-11-05
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Universidade Federal de Goiás
Resumo
This Thesis presents an acoustic-phonetic analysis of the oral and nasal vowels of Brazilian
Portuguese, specifically those of the speech community of Fortaleza dos Nogueiras,
Maranhão and European Portuguese, in some speech data from the region of Lisbon, Portugal.
The theoretical foundation is sustained on the postulates of Camara Jr. (1970 ), Mateus
(1982), de Morais Barbosa (1994) and Moraes and Wetzels (1992), concerning nasality in
Portuguese, especially in Brazilian Portuguese. The theoretical framework of Acoustic
Phonetics is composed mainly by the work of Ladefoged (2003, 2006 and 2007), Ladefoged,
Johnson (2008), Mateus et al. (2005), Delgado-Martins (1988), Morais Barbosa (1994),
Malmberg (1998), Medeiros (2007), Medeiros et al. (2008) and Sousa, E. (1994). The
informants used as subjects in this research, both Brazilian and Portuguese, are people with
low education, low turnover, 50 years of age or older. The Brazilian informants were born and
lived most of their lives in rural Fortaleza dos Nogueiras; the Portuguese live in the outskirts
of Lisbon. The speech data in Brazil are a result of our field research conducted in 2011. The
data from Portugal were provided by the Instituto de Linguística da Universidade de Lisboa
and form part of the speech collection of ALEPG (Linguistic and Ethnographic Atlas of
Portugal and Galicia). The acoustic-phonetic analysis of the data is made through the program
of Speech Station by Sensimetrics for visualization of expectograms and to extract
measurements of F1 and F2. We present the values of formants 1 and 2 of the oral and nasal
vowels and these are compared in order to show what happens with the nasal vowel in
relation to the corresponding oral; we highlight the acoustical characteristics of oral and nasal
vowels; we show the articulatory triangle of vowels of the informants of the research
highlighting the contours the vowels assume in articulation and the frequency bands in which
each vowel stands. Finally, we carry out a comparative investigation of oral and nasal vowels
in these two varieties of Portuguese.
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SANTOS, Gisélia Brito dos. Análise fonético-acústica das vogais orais e nasais do português: Brasil e Portugal. 2013. 199 f. Tese (Doutorado em Letras e Linguística) - Universidade Federal de Goiás, Goiânia, 2013.