We have a new NSERC Strategic Project Grant on developing next-generation speech synthesis through simulations of the human voice, so-called articulatory speech synthesis. This project involves a team of investigators at the Universities of Toronto, Saskatchewan, and British Columbia creating new ways to image and measure speech production, new 3D computer simulations of vocal tract biomechanics, and state-of-the-art airflow based sound synthesis. 

Our broader research activities in head & neck modeling are directed towards analysis of upper-airway dysfunctions, such as swallowing disorders (dysphagia), Obstructive Sleep Apnea (OSA) and computer-aided reconstructive head & neck surgery. This work involves advanced 3D biomechanical simulation with the ArtiSynth simulation toolkit. 

We work closely with clinical collaborators across North America and Internationally. My group has recently developed a tracker tool for video fluoroscopy data that is being actively used by a number of clinical research groups. 


  • Raj Natarajan, Ian Stavness, and William Pearson. Semi-automatic tracking of hyolaryngeal coordinates in VF swallowing studies. Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, (in press):1–11, 2015.
  • Negar Harandi, Ian Stavness, Jonghye Woo, et al. Subject-specific biomechanical modelling of the oropharynx. Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, (in press):1–11, 2015.
  • Ian Stavness, Antonio Sanchez, John Lloyd, et al. Unified skinning of rigid and deformable models for anatomical simulations. In SIGGRAPH Asia 2014 Technical Briefs , pages 1–4, 2014.
  • Bryan Gick and Ian Stavness Modularizing speech. Frontiers in Psychology, 4, 2013.
  • Ian Stavness, JE Lloyd, and SS Fels. Automatic Prediction of Tongue Muscle Activations Using a Finite Element Model. Journal of Biomechanics, 45(16):2841-2848, 2012. [ PDF ]
  • Ian Stavness, MA Nazari, P Perrier, D Demolin, and Y Payan. A Biomechanical Modeling Study of the Effects of the Orbicularis Oris Muscle and Jaw Posture. Journal of Speech, Language, and Hearing Research, 56:878–890, 2013.
  • Ian Stavness, B Gick, D Derrick, and SS Fels. Biomechanical Modeling of English /r/ Variants. Journal of the Acoustical Society of America Express Letters, 131(5):355-360, 2012. [ PDF ]
  • Ian Stavness, JE Lloyd, Y Payan, and SS Fels. Towards Speech Articulation Simulation with a Dynamic Coupled Face-Jaw-Tongue Model. International Symposium on Speech Production (ISSP '11), Poster, June 2011.
  • Ian Stavness, JE Lloyd, Y Payan, and SS Fels. Dynamic Hard-Soft Tissue Models for Orofacial Biomechanics.ACM SIGGRAPH Talks, July 2010.
  • Ian Stavness, JE Lloyd, Y Payan, and SS Fels. Coupled Hard-Soft Tissue Simulation with Contact and Constraints Applied to Jaw-Tongue-Hyoid Dynamics. International Journal for Numerical Methods in Biomedical Engineering, 27:367-390, 2011. [ PDF ]
  • Ian Stavness, AG Hannam, JE Lloyd, and SS Fels. Predicting muscle patterns for hemimandibulectomy models. Computer Methods in Biomechanics and Biomedical Engineering, 13(4):483-491, 2010.
  • AG Hannam, Ian Stavness, JE Lloyd, SS Fels, A Miller, and D Curtis. A comparison of simulated jaw dynamics in models of segmental mandibular resection versus resection with alloplastic reconstruction.Journal of Prosthetic Dentistry, 104(3):191-198, 2010.
  • AG Hannam, Ian Stavness, JE Lloyd, and SS Fels. A Dynamic Model of Jaw and Hyoid Biomechanics during Chewing. Journal of Biomechanics, 41(5):1069-1076, 2008.