5/18/2023 0 Comments Praat chartThe alignment between intonation, rhythm and discourse, having the stress groups as attractors, allowed us to propose the insertion of a glottal oscillator into the Dynamic Model of Rhythm. By the inclusion of a new layer for the stress groups segmentation into DaTo system was possible to observe the alignment between stress group segmentation and intonational annotation coinciding with discourse segments boundaries. The speech rhythm is also aligned to the pattern formed between intonation and discourse. Each of these segments is aligned to the speech intonation pattern delimitated by a rising contour (LH or> HL) at the beginning and by a falling contour (LHL), or a boundary level (L), at the end. For each discourse segment classified as spontaneous, according to a criteria proposed in this thesis, the speech is segmented into the DaTo system framework in linguistically structured units, which contains the purposes of communication and attention. These patterns, or intonational cycles, which organize the BP intonation, emerge when related to the spontaneous discourse segmentation. This thesis hypothesis is that in addition to these oscillators, a glottal oscillator can act controlling the intonation patterns of speech. The Dynamic Model of Rhythm suggests that speech rhythm is the result of two oscillators action – accentual and syllabic - which receive linguistic and gestural information as input, and give the gestural duration as output. The study of these relationships were based on Barbosa’s (2006) Dynamic Model of Speech Rhythm on DaTo intonational annotation system proposed by Lucente (2008) and on the Computational Model of the Structure of Discourse, proposed by Grosz & Sidner (1986). This thesis explores the relationship between intonational patterns and its relationship with speech rhythm and discourse, according to the dynamic systems research program. The results of the acoustic analysis encompassed in this article, hope to provide quantitative acoustic data on a limited scale regarding the formant structure of the Setswana vowels in order to assess the present perceptual descriptions of these vowels. Choi (1991:4) summarizes the traditional articulatory approach fittingly as follows: ”While such descriptions are valuable, they are nonetheless qualitative, and ideally, should be complemented by instrumental examination. The vowels are positioned on the vowel chart according to their auditory qualities and those of the cardinal vowels. The vowel system of Setswana consists of seven vowels and four raised variants of the mid vowels. The data presented in this article should lead to a more scientific description and presentation of the Setswana vowels. To improve this situation, an acoustic study was carried out. Due to the lack of scientific evidence to support these descriptions, many discrepancies exist that were transferred to the vowel charts as well. Descriptions of the Setswana vowels as found in textbooks and other sources are mainly articulatory in nature and are based on auditive perceptions. This article aims at the presentation of data recovered from an acoustic analysis of the vowels of Setswana (S31), a Bantu language spoken in Botswana, the North Western, Northern Cape and Gauteng provinces of South Africa.
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