Análise fonético-acústica das vogais orais e nasais do português: Brasil e Portugal

• Autor(a) principal: Santos, Gisélia Brito dos
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/0013000000t56
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/3719
• topic: Análise fonético-acústica; Vogais nasais; Vogais orais; Triângulo articulatório; Acoustic-phonetic analysis; Nasal vowels; Oral vowels; Articulatory triangle; LINGUISTICA, LETRAS E ARTES::ARTES

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.