Dataset and supplementary material - Doctoral Dissertation: Secuencias de vocales en frontera de palabra

This doctoral dissertation focuses on a study of vowel sequences across word boundaries in semi-spontaneous data from Peninsular Spanish, Mexican Spanish, and Brazilian Portuguese. Through an analysis of sandhi versus hiatus based on variables such as vowel type, stress, sequence position, coarticulation with adjacent segments, articulation rate, and word type, it is found that some of these variables can affect the behavior of sequences at the boundary more than others. It is observed that the effect of word stress, speech stress, and sequence position influences the behavior of sequences more than vowel type, word type, and coarticulation with adjacent segments. Articulation rates also influence sandhi/hiatus production, with higher articulation rates leading to more sandhi being produced. Furthermore, the effects that sandhi can have on the duration and coarticulation of vowels are analyzed. Duration tends to decrease when sandhi is applied in both languages. Regarding coarticulation, monophthongs by elision stand out, as they generally tend to eliminate the first vowel and not maintain acoustic features of that vowel in production. On the other hand, diphthong trajectories have a more gradual curvature and show significant differences in most sequences when compared to hiatuses.