Análise acústica dos correlatos prosódicos do acento lexical do Português Brasileiro

Regina Fernandes Cruz, Benedita do Socorro Pinto Borges, Albert Rilliard, Jany Eric Queiros Ferreira, Emanuel Fontel

Abstract


The current work revisits the prosodic characteristics of the Brazilian Portuguese (PB) lexical stress, matching an acoustic approach and sociolinguistic corpus. We analyze here speech samples of 6 native speakers of the PB, stratified into sex and having a high educational level. The corpus is composed of 1134 totems (3 kinds of lexical stress x 7 words x 3 syllables x 3 repetitions x 6 speakers). The mean fundamental frequency (F0) was calculated in semitone and the intensity (dB) taken in the nuclear element of each syllable. For the duration (ms) it was considered the whole syllable. The data demonstrate that duration is the most robust physical parameter in the distinction between stressed and unstressed syllables. The pre-tonic syllables, in the case of the paroxytones and oxytones, register the greatest number of F0 variations. The intensity was not a robust parameter in the characterization of lexical stress in BP.

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