PROPERTIES OF I-BOUNDARY LENGTHENING OF VOWELS IN ENGLISH AND SERBIAN
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Abstract
Phonological features which signal the right IP edge include boundary tones and pre-boundary lengthening. However, languages differ in the prominence of these features. While in English final information focus has significant F0 prominence on PWd immediately preceding I-boundary, Serbian primarily relies on durational cues to signal final information focus and, thus, the right IP edge. This research aims at analyzing the degree and scope of I-boundary lengthening in English and Serbian as well as examining whether there is a compensatory relation between F0 prominence and pre-boundary lengthening in these languages. The research is part of a larger-scale corpus study involving approximately one hour of read speech per language. Both English and Serbian speakers were professional newsreaders and the recordings were comparable in terms of articulation rate and recording quality. The acoustic analysis involved measuring the degree and scope of lengthening in trisyllabic PWds, which was done in the Praat programme (version 6.0.52). The results of the measurements were statistically analyzed. The results of the analysis primarily point to the differences in the scope of I-boundary lengthening in English and Serbian. While the scope of lengthening in Serbian affects the stressed vowel of IP-final PWd as well as all the vowels following it, English post-accented non-final unstressed vowels are skipped by this process. Accordingly, wider scope of lengthening might suggest slightly higher significance of this process in Serbian, which can further be interpreted as a compensation for low F0 prominence at the right IP edge in this language.
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