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The Vocal Tract Visualization Lab maintains a diverse collection of
physiological instruments for measuring speech production. |
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| Ultrasound | Ultra high frequency sound waves are used to create image sequences of tongue motion in real-time. These 2D sequences can be reconstructed into 3D tongue surfaces. |
| Cine-Magnetic Resonance Imaging (Cine-MRI) | Vocal tract image sequences are recorded at up to 25 Hz, by summing individual time phases of multiple repetition sequence during short speech utterances. |
| High Resolution MRI (hMRI) | Static images define muscles and depict crisp edges within the vocal tract. |
| Tagged Cine-Magnetic Resonance Imaging (tMRI) | Tags are applied to tissue, and image sequences are recorded as the tissue and tags deform. tMRI allows tracking of tissue points in oral structures, and calcualtion of deformation parameters. |
| Diffusion Tensor MRI (DTI) | Tissue orientation is quantified by imaging the orientation-dependent diffusion processes that are associated with fibers. |
| Acoustical Analysis | The speech wave is recorded simultaneously with the physiological measures and analysed using spectral and waveform analysis packages. |
| Pressure Palatography (PPG) | Acrylic palates, custom made to fit each subject's palate record tongue-palate pressure in real-time. Sensors are embedded strain gauges. |
