Inscrição na biblioteca: Guest
TSFP DL Home Arquivos Comitê executivo

EFFECTS OF THREE-DIMENSIONAL FLOW INDUCED BY A UNILATERAL POLYP ON ENERGY TRANSFER AND VOCAL FOLD MOTION IN VOICED SPEECH

Byron D. Erath
School of Mechanical Engineering, Purdue University 585 Purdue Mall, West Lafayette, IN, 47907; Department of Mechanical and Aerospace Engineering The George Washington University 205 Staughton Hall, 707 22nd St. NW, Washington, DC

Michael W. Plesniak
Maurice J. Zucrow Laboratories (formerly Thermal Sciences and Propulsion Center), School of Mechanical Engineering, Purdue University, West Lafayette, Indiana, USA; Department of Mechanical and Aerospace Engineering The George Washington University

Resumo

The evolution of three-dimensional glottal flow patterns arising from the presence of a unilateral polyp is presented. The polyp is modeled by a hemi-spheroid-like protuberance placed on the medial surface of 7.5 time scaled-up, driven vocal fold model. Particle image velocimetry measurements in both the streamwise and cross-stream directions identify the development of hairpin and horseshoe vortices during the closing phases of the phonatory cycle. These flow structures induce significant three-dimensional flow effects that are otherwise absent during normal vocal fold motion. Three-dimensional flow behavior is correlated to the energy exchange process that drives vocal fold motion.