14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Toward a Hierarchical Model of Rhythm Production: Evidence from Phrase Stress Domains in Brazilian Portuguese

Plínio A. Barbosa (1), Sandra Madureira (2)

(1) Universidade Estadual de Campinas, Brazil
(2) Pontifícia Univerdade Católica de São Paulo, Brazil

Acoustic final lengthening is addressed in this work by examining segment durations at three different phrase boundaries. Each prosodic boundary strength also orthogonally compares two kinds of Brazilian Portuguese lexical pattern (paroxyton and oxyton). Careful statistical analyses show that overall V#C lengthening distinguishes the two weaker phrase boundaries from each other. It is also shown that postboundary onset consonants are lengthened by the same process stretching the preboundary vowel. At utterance boundary, oxytons and paroxytons do not entrain distinct lengthenings in postboundary consonants, but they do so in the two other prosodic conditions. For them, the stress degree of the last vowel extends to the postboundary consonant. These results indicate that initial lengthening is not the only phenomenon cueing initial strengthening at phrase left edges. Based on these and earlier data, a dynamical, hierarchical model of rhythm production is presented.

Full Paper

Bibliographic reference.  Barbosa, Plínio A. / Madureira, Sandra (1999): "Toward a hierarchical model of rhythm production: evidence from phrase stress domains in Brazilian Portuguese", In ICPhS-14, 297-300.