The perception of lexical stress in Spanish. Llisterri, J., Machuca, M. J., de la Mota, C., Riera, M., & Ríos, A. In Solé, M. J., Recasens, D., & Romero, J., editors, ICPhS 2003. Proceedings of the 15th International Congress of Phonetic Sciences, pages 2023-2026, Barcelona, Spain. 3-9 August, 2003, 2003.
The perception of lexical stress in Spanish [pdf]Paper  abstract   bibtex   
As in other languages, stress in Spanish is signaled by three simultaneous acoustic cues: fundamental frequency (F0), duration and intensity. In this experiment, the role of these parameters in the perception of lexical stress in isolated words has been studied using natural resynthesized speech. Results show that the F0 contour alone is not enough to allow the identification of the stressed syllable of a word. However, in combination with duration, intensity or both duration and intensity, F0 is a relevant acoustic cue for the perception of lexical stress. On the other hand, intensity and duration, either combined or in isolation, are not sufficient for the identification of the stressed syllable within a word.

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