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No. of bitstreams: 1 TESE_ANA PAULA DA SILVA.pdf: 2482788 bytes, checksum: 360c31c647f942a1bfdb12fc302ad3d5 (MD5) Previous issue date: 2018-03-27 / Conselho Nacional de Pesquisa e Desenvolvimento Cient?fico e Tecnol?gico - CNPq / This thesis deals with the production and perception of voiceless sibilant fricatives [s] and [?] in syllable onset and coda in the varieties of Brazilian Portuguese spoken in Porto Alegre/RS and Florian?polis/SC under the perspective of Sociophonetics (FOULKES, DOCHERTY, 2006; FOULKES; SCOBBIE; WATT, 2010; THOMAS, 2011). This research aims: i) to provide the acoustic description of the sibilant fricatives produced in Porto Alegre/RS and Florian?polis/SC in onset and coda; ii) to investigate the effects of the linguistic bias (contrastive and non-contrastive function of sibilant fricatives) on the phonetic perception of sibilant fricatives in onset and coda; and iii) to investigate the effects of the cognitive bias on the perception of phonetic variation of sibilant fricatives in coda. The corpus of this study consists of two samples of production data, one referring to data from 16 informants from Florian?polis and another sample referring to data from 24 informants from Porto Alegre. Regarding the perception data, the sample collected in Florian?polis consists of 30 participants, while the sample collected in Porto Alegre consists of 10 participants. The acoustic analysis of the sibilant fricatives partially confirmed the predicted coarticulatory effects of the surrounding vowel contexts and the effects of syllable stress on the spectral characterization of the sibilant fricatives, except for the vowels [u] and [o] preceding the fricative sibilant in coda and the unstressed pretonic syllable in the case of the alveolar fricative in onset. It seems that the variability of the phonetic production correlates with the gender of the speakers in the two cases indicated. The gender of the speakers also seems to interfere in the production of the alveolar fricative in onset by more educated people from Porto Alegre, with men tending to increase the Centroid, while women tend to reduce it. The temporal parameter examined showed a constant effect, namely the increase of frequencies as a function of the duration of the sibilants in onset and coda. The increase in frequencies due to the monitored speech style has also been confirmed and it is suggested to be an articulatory behavior associated specifically to women. Concerning the analysis of perception data, contrast and noncontrast relations of sibilant fricatives do affect the perception of men and women from Florian?polis and men from Porto Alegre, but not in the perception of women from Porto Alegre. Regarding the perception of phonetic variation, the results suggest that automatic associations between the stereotype of native/local resident and the palatoalveolar fricative in Florian?polis and the association between the stereotype of portoalegrense and the alveolar fricative in Porto Alegre are activated during perception. Moreover, the implicit association tends to become stronger as participants overtly report a greater difference between alveolar and palato-alveolar stimuli. However, the fact that some participants associate this difference to linguistic aspects other than the sibilant fricative in coda shows that the perception of socially structured phonetic variation occurs unconsciously. It is therefore concluded that the production of voiceless sibilant fricatives in Brazilian Portuguese is phonetically gradient and varies according to the gender of the speakers and that the perception of these sounds is mediated by linguistic and cognitive biases. / Esta tese trata da produ??o e percep??o das fricativas sibilantes n?o-vozeadas [s] e [?] em ataque e coda sil?bica nas variedades de portugu?s brasileiro faladas em Porto Alegre/RS e Florian?polis/SC sob a perspectiva da Sociofon?tica (FOULKES; DOCHERTY, 2006; FOULKES; SCOBBIE; WATT, 2010; THOMAS, 2011). A pesquisa teve como objetivos: i) realizar a descri??o ac?stica das fricativas sibilantes produzidas em Porto Alegre/RS e Florian?polis/SC em ataque e coda sil?bica; ii) investigar os efeitos do vi?s lingu?stico (fun??o contrastiva e n?o-contrastiva das fricativas sibilantes) sobre a percep??o fon?tica das fricativas sibilantes em ataque e coda sil?bica; e iii) investigar os efeitos do vi?s cognitivo sobre a percep??o da varia??o fon?tica das fricativas sibilantes em coda sil?bica. O corpus deste estudo contou com duas amostras de dados de produ??o, a saber, uma amostra referente a dados de 16 informantes florianopolitanos e outra amostra referente a dados de 24 informantes porto-alegrenses. Quanto aos dados de percep??o, a amostra florianopolitana ? constitu?da por 30 participantes, ao passo que a amostra portoalegrense conta com 10 participantes. A an?lise ac?stica das fricativas sibilantes confirmou parcialmente os efeitos coarticulat?rios dos contextos voc?licos circundantes e da tonicidade sobre a caracteriza??o espectral das fricativas sibilantes, exceto pelas vogais [u] e [o] em contexto precedente ? sibilante em coda e pela tonicidade pret?nica no caso da fricativa alveolar em ataque. Ao que parece, a produ??o fon?tica vari?vel se correlaciona com o g?nero dos falantes nos dois casos indicados. O g?nero dos falantes tamb?m parece interferir na produ??o da fricativa alveolar em ataque pelos porto-alegrenses que possuem n?vel Superior de escolaridade, sendo que os homens tendem a aumentar o Centroide, enquanto as mulheres tendem a reduzi-lo. O par?metro temporal examinado apresentou um efeito constante, a saber, o aumento das frequ?ncias em fun??o da dura??o das sibilantes em ataque e coda. O aumento das frequ?ncias em fun??o do estilo de fala monitorado tamb?m se confirmou e sugere se tratar de um comportamento articulat?rio associado especificamente ?s mulheres. No que diz respeito ? an?lise dos dados de percep??o, as rela??es de contraste e de n?o-contraste das fricativas sibilantes de fato interferem na percep??o dos homens e mulheres florianopolitanos e dos homens portoalegrenses, mas n?o na percep??o das mulheres porto-alegrenses. Em rela??o ? percep??o da varia??o fon?tica, os resultados sugerem que associa??es autom?ticas entre o estere?tipo de morador nativo e a fricativa palato-alveolar em FLN e entre o estere?tipo de porto-alegrense e a fricativa alveolar em POA s?o ativadas durante a percep??o. Mais do que isso, a associa??o impl?cita tende a se tornar mais forte conforme os participantes reportam explicitamente uma diferen?a maior entre os est?mulos alveolar e palato-alveolar. Todavia, o fato de que alguns participantes relacionam essa diferen?a a outros aspectos lingu?sticos que n?o ? fricativa sibilante em coda evidencia que a percep??o da varia??o fon?tica socialmente estruturada ocorre de modo inconsciente. Conclui-se, portanto, que a produ??o das fricativas sibilantes n?o-vozeadas do portugu?s brasileiro ? foneticamente gradiente e varia em fun??o do g?nero dos falantes e que a percep??o desses sons ? mediada por vieses lingu?sticos e cognitivos.