University of Maryland (USM)

The Vocal Tract Visualization (VTV) Laboratory is located in the Department of Neural and Pain Sciences at the University of Maryland Dental School in Baltimore, MD.

The Vocal Tract Visualization Laboratory has measured tongue and vocal tract function during speech for 30 years, using multiple techniques such as, ultrasound, MRI, acoustics, and electropalatography.

Dr. Stone has been a pioneer in the development of ultrasound as a research tool to measure tongue motions, and the use of tagged Cine-MRI to infer tongue muscle activities. Software developed in her lab is now used around the world to analyze ultrasound images of tongue motion. Her work in tagged MRI, and that of her colleagues, is unique in the field of speech research and is expected to propel the advancement of tongue research methodology as her ultrasound work did.

The laboratory contains 525 sq. ft. of floor space. The Vocal Tract Visualization Lab data collection room is a separate room attached by a door to the main lab. Ultrasound and video based studies are performed here. Data analysis is done in the main room of the VTV lab. The data analysis area consists of desks, computers, storage, and data analysis equipment, as well as electrical outlets, internet connections, etc.

A complete ultrasound data collection room is available to the project. However, it is expected that the data will typically be collected at the ESPCI in Paris at the Sigma Lab, which also has complete ultrasound data collection facilities. If the UMB facility is needed, it can be made available. Both of these facilities contain state of the art ultrasound machines with devices to stabilize the head, the ultrasound transducer, and the video camera during data collection. Data is stored digitally and analyzed off line.