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Physiology - Phon.

Physiology of phonation

nonspeech laryngeal function protection/ prohibition of foreign objects into the lungs
coughing reflux response by tissue of the respiratory passageway to an irritant or foreign object; creates (+) subglottal pressure
abdominal (thoracic) fixation process of capturing air within the thorax to provide muscles with a structure on which to push or pull
larynx a cartilaginous structure housing two bands of tissue called vocal folds
vocal folds bands of tissue that are visible from a point immediently behind the tongue, looking down towards the lungs
Bernoulli effect given a constant volume flow of air or fluid, at a point of constriction, there will be a decrease in air pressure (P) perpendicular to flow & an increase in velocity of flow
minimum subglottal pressure amount of pressure needed to blow open the vocal folds in order to sustain phonation; 3-5 cm of water
voicing the product of repeated opening and closing of the vocal folds
vibration of VFs the product of airflow interacting with tissue in the absence of repetitive muscular contraction
vocal attack used to start phonation; voice onset; adduct vocal folds, moving them into the air stream
termination of phonation abduct vocal folds; voice offset
sustained phonation hold vocal folds in fixed position in the air stream
vocal fold nodules a callous-like, protective layer of epithelium on the vocal folds as a result of vocal abuse
vocal fundamental frequency one primary frequency of vibration (for a speech sound)
minimum driving pressure see minimum subglottal pressure
portable manometer gives the client feedback about their respiratory ability, provides clinician with a measurable function
pitch the perceptual correlate of frequency; what you perceive frequency as
optimal pitch (frequency) the pitch of vocal fold vibration that is optimal for an individual; most efficient frequency of vibration for a given pair of vocal fodls
habitual pitch the frequency of vibration of VFs that is normally used in conversation; ideally the same as the optimal
Created by: terriers16



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