High Speed Observation Of Spatiotemporal Chaos In A Voice Production System

The spatial-temporal chaos has recently become the subject of intensive experimental and theoretical investigations. Studying vibratory dynamics of the vocal folds is important for natural voice productions. Disordered voices are usually observed in laryngeal pathologies, such as laryngeal paralysis and vocal polyps. In this study, we report spatiotemporal chaotic vibratory behavior in a biomedical vocal fold system. Spatiotemporal chaos in excised larynx vibrations is recorded using high-speed digital imaging. Spatiotemporal analyses effectively describe the spatiotemporal dynamics of the vocal fold vibrations and investigate the effects of subglottal pressure. With the increase of subglottal pressures, correlation dimension and glottal entropy are increased. Spatiotemporal chaos plays an important role in understanding irregular dynamics of disordered voice production.