جستجوی مقالات مرتبط با کلیدواژه "گسترش نواخت" در نشریات گروه "ادبیات و زبان ها"

This research aims to improve speech synthesis in Persian and investigate the pitch contour fall between two H* peaks carried out in the framework of the Autosegmental Metrical (AM) theory of intonational phonology. In this paper, we tested two main hypotheses. Firstly, the F0 falls through phonetic interpolation and, secondly, it involves tone spreading. The present paper argues that the first hypothesis is proven to be correct. The data for the present research includes 45 enclitic phrases that were produced using voiced consonants between the two peaks. It means that in the course of producing each phrase, it was taken into consideration that all of the consonants placed between the two peaks would be deliberately and certainly voiced. This is mainly because if the consonants were not voiced, the data analysis results would be affected in Praat. It has to be noted that the distance between the two H* was increased by adding zero to two unstressed syllables. Totally, we recorded 1350 utterances from 30 native Persian speakers. We employed Praat software so as to analyse the utterances. Besides, we utilized SPSS for further analysis. The results of acoustic and statistical analyses showed that the distance between the first peak and the following F0 valley is increased with the addition of the unstressed syllables, demonstrating the alignment of this valley with the beginning of the stressed syllable. Results of statistical analyses revealed that the distance between the H and the following L target is increased significantly with the addition of the unstressed syllables. Furthermore, the normalized pitch contour was computed for all data. This indicates that the fall of the pitch contour between the two H peaks is realized through phonetic interpolation.