CSD-2361 Lecture Notes - Lecture 3: Thoracic Cavity, Vocal Folds, Abdominal Cavity
26 Feb 2018
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Document Summary
Velum (soft palate), oral & nasal cavities, articulators. Process of speech production begins with the lungs. A preparatory breath is taken good breath support is needed for speech. During inhalation the thoracic cavity (chest cavity) expands, accomplished partly by lowering the diaphragm which contracts. The diaphragm separates the abdominal cavity from the thoracic cavity. Consists of the larynx which is composed mainly of muscle and cartilage. The larynx is attached inferiorly to the trachea and superiorly to the hyoid bone. The larynx houses the vocal cords or vocal folds which are responsible for phonation, as well as the epiglottis which protects the trachea from food and is important in maintaining air pressure during strenuous activities. Sounds are produced with a flow of air that moves outward from the lungs. When air stream enters the larynx exerts pressure on the vc from below this pressure is actually applied to the glottis.
