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Summary
The particle velocity across the glottis was measured with simultaneous electroglottography,
photoglottography, and subglottic pressure in an in vivo canine model of phonation.
A constant temperature anemometer measured flow velocity at five midline anterior
to posterior glottal positions. Tracheal input air flow was varied in five steps from
175 to 500 cc/s, while vocal fold approximation was achieved by constant electrical
stimulation of the laryngeal nerves. For all levels of air flow, a decreasing peak
velocity gradient was observed from the anterior commissure to the arytenoids. Time-varying
features of the flow velocity are discussed in relation to glottal vibratory events
and aerodynamics.
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© 1989 Raven Press, Ltd., New York. Published by Elsevier Inc.