Voice and Resonance Laboratory


Lab Director
Tim Bressmann, PhD
Tim Bressmann is an Associate Professor in the Department of Speech-Language Pathology. He teaches the courses SLP 1525 Structurally Related Speech Disorders and SLP 1530 Voice Disorders.  Current research in the Voice and Resonance Lab focuses on ultrasound imaging of tongue movement of speakers with articulation disorders. We are particularly interested in speech disorders associated with cleft palate or tongue cancer. Another focus of research is on oral-nasal balance in the speech of people with cleft palate.

Post Doctoral Fellow
Larissa Berti, PhD
Dr. Larissa Berti is a professor of Fonoaudiologia at the UNESP Marilia in Sao Paulo, Brazil. She has joined the Voice and Resonance Lab with a postdoctoral fellowship granted by the Brazilian research foundation FAPESP. Her research focuses on ultrasound imaging of articulation and phonological disorders in Brazilian Portuguese.

Doctoral Student
Gillian de Boer, MA, MSc
Gillian de Boer is a PhD student who conducts research on the assessment of oral-nasal balance disorders, such as hypernasal speech. She uses both nasometry and acoustic analysis to develop predictive algorithms for the diagnosis of oral-nasal balance disorders.


De Boer G, Bressmann T. Application of linear discriminant analysis to the Long Term Averaged Spectra of simulated disorders of oral-nasal balance. Cleft Palate-Craniofacial Journal, (accepted).

Koch S, Bressmann T, Ratner A, Seigel J, Binkofski F. Ultrasonographic measurement of tongue movement in lingual hemiparalysis. Journal of Stroke and Cerebrovascular Diseases (in press).

De Boer G, Bressmann T. Application of linear discriminant analysis to the nasometric assessment of resonance disorders: A pilot study. Cleft Palate-Craniofacial Journal (in press).

Awan SN, Bressmann T, Poburka B, Roy N, Sharp H, Watts C. Dialectical Effects on Nasalance: A Multicenter, Cross-Continental Study. Journal of Speech, Language, Hearing Research, 2015; 58: 69-77.

Bressmann T, Foltz A, Zimmermann J, Irish JC. Production of tongue twisters by speakers with partial glossectomy: A pilot study. Clinical Linguistics and Phonetics, 2014; 28: 951-964.

Ayliffe BW, Bressmann T, Al-Mardini M, Jokstad A. Evaluation of a modular palatal lift prosthesis with a silicone velar lamina for hypernasal patients. Journal of Prosthetic Dentistry. 2014, 11: 663-671.

Bressmann T, Sell D. Plus ça change: Selected papers on speech research from the 1964 issue of the Cleft Palate Journal. Cleft Palate-Craniofacial Journal 2014; 51: 124-128.

De Boer G, Bressmann T. Comparison of nasalance scores obtained with the Nasometers 6200 and 6450. Cleft Palate-Craniofacial Journal 2014; 51: 90-97.

Tang YW, Harmaneh G, Bressmann T. Tongue contour tracking in dynamic ultrasound via higher-order MRFs and efficient fusion moves. Medical Image Analysis, 2012; 16: 1503-1520.

Bressmann T. An ultrasonographic study of lingual contortion speech. Journal of Phonetics, 2012; 40: 830-836.

Bressmann T, Anderson JD, Carmichael RP, Mellies C. Prosthodontic management of hypernasality: Two very different cases. Canadian Journal of Speech-Language Pathology and Audiology, 2012; 36: 50-57.

Bressmann T, Eriks-Brophy A. Use of simulated patients for a student learning experience on managing difficult patients in speech-language pathology contexts. International Journal of Speech-Language Pathology, 2012; 14: 165-173.

Steele CM, Sasse C, Bressmann T. Tongue pressure and hyoid movement timing in healthy liquid swallowing. International Journal of Communication Disorders, 2012; 47: 77-83.

Bressmann T, Radovanovic B, Kulkarni GV, Klaiman P, Fisher D. An ultrasonographic investigation of cleft-type compensatory articulations of voiceless velar stops. Clinical Linguistics and Phonetics. 2011; 25: 1028-1033.

Stevens K, Bressmann T, Gong SG, Tompson B. The impact of a rapid palatal expander on speech articulation. American Journal of Orthodontics and Dentofacial Orthopedics, 2011; 140: e67-e75.