SPHHRNG 3320 Lecture Notes - Lecture 3: Vocal Folds, Egressive Sound, Phonation
4 Oct 2016
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Systems for producing sounds: respiration (airstream, phonation, resonation, articulation. Structures: lungs, rib cage, diaphragm, and related muscles. Functions: provides for intake of oxygen and removal of waste gasses, provides air needed for speech production. Outward flow of air = egressive (muscles of. Inward flow of air = ingressive (muscles of thorax contract to draw air into lungs (inspiration)) Rate of vocal fold vibration is the fundamental frequency (f0): f0 men = 125 hz; Women = 250 hz; newborn baby = 500 hz. 1 hertz = one complete cycle of vibration per second. Function: larynx is a protective valve in the aerodigestive track, vocal folds generate sound. Muscles of vocal folds bring them together. The force of the air in the lungs blows them apart. Involves 3 major air cavities (pharynx, oral, nasal), and the velum, jaw, tongue, lips, pharyngeal walls, and related muscles. All are primarily used for controlled passage of food, fluids and air.
