14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Direct and Indirect Measures of Speech Articulator Motions Using Low Power EM Sensors

G. C. Burnett, J. F. Holzrichter, T. J. Gable, L. C. Ng

Lawrence Livermore National Laboratory and University of California, Davis, CA, USA

Low power Electromagnetic (EM) Wave sensors can measure general properties of human speech articulator motions, as speech is produced. See Holzrichter, Burnett, Ng, and Lea, J.Acoust.Soc.Am. 103 (1) 622 (1998). Experiments have demonstrated extremely accurate pitch measurements (<1 Hz per pitch cycle) and accurate onset of voiced speech. Recent measurements of pressure-induced tracheal motions enable very good spectral and amplitude estimates of a voiced excitation function. The use of the measured excitation functions and pitch synchronous processing enable the determination of each pitch cycle of an accurate transfer function and, indirectly, of the corresponding articulator motions. In addition, direct measurements have been made of EM wave reflections from articulator interfaces, including jaw, tongue, and palate, simultaneously with acoustic and glottal open/close signals. While several types of EM sensors are suitable for speech articulator measurements, the homodyne sensor has been found to provide good spatial and temporal resolution for several applications.

Full Paper

Bibliographic reference.  Burnett, G. C. / Holzrichter, J. F. / Gable, T. J. / Ng, L. C. (1999): "Direct and indirect measures of speech articulator motions using low power EM sensors", In ICPhS-14, 2247-2249.