13th Annual Conference of the International Speech Communication Association

Portland, OR, USA
September 9-13, 2012

Articulatory Differences Between Oral and Nasal Vowels Based on the Simulation of a Speaker-adaptive Articulatory Model

Panying Rong (1), Ryan K. Shosted (2), David Kuehn (1)

(1) Department of Speech and Hearing Science, University of Illinois, Champaign, IL, USA
(2) Department of Linguistics, University of Illinois, Urbana, IL, USA

In this study, a speaker-adaptive articulatory model was constructed by fitting point-wise articulatory positions measured by Electromagnetic Articulography (EMA) to the framework of Childerfs vocal tract model (2000) to customize the standard vocal tract model with speaker-dependent articulatory features. With the speaker-adaptive articulatory model, the area functions of oral and nasal vowel pairs (/a/, /i/, /u/) were simulated. The differences of area functions between oral and nasal vowels were decomposed into orthogonal modes (Story et al., 1998) to account for the primary articulatory changes related to nasalization. The relationship between the principal articulatory modes and the lowest two formant frequencies (F1, F2) was examined to indicate the effect of oropharyngeal articulatory alterations on the acoustics of nasal vowels.

Index Terms: articulatory modeling, nasalization, electromagnetic articulography

Full Paper

Bibliographic reference.  Rong, Panying / Shosted, Ryan K. / Kuehn, David (2012): "Articulatory differences between oral and nasal vowels based on the simulation of a speaker-adaptive articulatory model", In INTERSPEECH-2012, 2698-2701.