My research is primarily concerned with the basic mechanisms of speech production and perception in connected discourse, especially in terms of how multiple layers of communicative meanings can be encoded through a common process of articulation. In particular, I am interested in the production, perception, typology, and modelling and synthesis of speech prosody, as well as the basic mechanisms of coarticulation. I am also concerned with computational modeling of the neural process of speech acquisition. More recently, I have developed an interest in the understanding of emotional expressions in speech from an evolutionary perspective. For more information, please see my Research page.
Xu, Y. and Prom-on, S. (2014). Toward invariant functional representations of variable surface fundamental frequency contours: Synthesizing speech melody via model-based stochastic learning. Speech Communication 57, 181-208. On-line access
Cheng, C. and Xu, Y. (2013). Articulatory limit and extreme segmental reduction in Taiwan Mandarin. Journal of the Acoustical Society of America 134: 4481-4495.
Prom-on, S. and Xu, Y. (in press). Discovering underlying tonal representations by computational modeling: a case study of Thai. Journal of Chinese Linguistics. Request author version
Liu, F., Xu, Y., Prom-on, S. and Yu, A. C. L. (2013). Morpheme-like prosodic functions: Evidence from acoustic analysis and computational modeling. Journal of Speech Sciences 3: 85-140.
Xu, Y., Lee, A., Wu, W.-L., Liu, X. and Birkholz, P. (2013). Human vocal attractiveness as signaled by body size projection PLoS ONE 8(4): e62397.
Continued: Call for international collaborations: Cross-linguistic distribution of Post-Focus Compression (PFC) and its hisotircal origin.
- Xu, Y., Kelly, A. and Smillie, C. (2013). Emotional expressions as communicative signals. In S. Hancil and D. Hirst (eds.) Prosody and Iconicity, John Benjamins Publishing Co, pp. 33-60.
- Liu, F., Jiang, C., Pfordresher, P. Q., Mantell, J. T., Xu, Y., Yang, Y. and Stewart, L. (2013). Individuals with congenital amusia imitate pitches more accurately in singing than in speaking: Implications for music and language processing. Attention, Perception, & Psychophysics 75(8): 1783-1798.
- Wang, B., Qadir, T. and Xu, Y. (2013). 维吾尔语焦点的韵律实现及感知 [Prosodic encoding and perception of focus in Uygur]. Acta Acoutica Sinica 38: 92-98.
- Lin, C. Y., Wang, M., Idsardi, W. J. and Xu, Y. (2013). Stress processing in Mandarin and Korean second language learners of English. Bilingualism: Language and Cognition.
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