Knowra Vocal folds Vocal folds Vocal folds are paired folds of tissue in the larynx that vibrate as air passes between them. Their vibration produces the sound source used in voiced speech and many other vocal sounds.
Phonation : The production of vocal sound through vibration of the vocal folds. Phonation is the process that begins when air sets these folds vibrating.
Larynx : A structure in the neck that houses the vocal folds and connects the pharynx to the trachea. It contains and positions the folds for breathing, protection, and sound production.
Voice quality : The perceptual character of a voice, including qualities such as breathiness, roughness, and strain. Differences in fold vibration contribute to these audible qualities.
Whispering : Speech produced without regular vocal-fold vibration, often with turbulent airflow at the glottis. Whispering uses the larynx while withholding the periodic vibration associated with voiced speech.
Myoelastic-aerodynamic theory : A model explaining vocal-fold vibration through tissue elasticity, muscle tension, and airflow. It explains how airflow sustains vibration without the folds actively opening and closing each cycle.
Vocal fold mucosa : The moist surface lining of a vocal fold, including tissue layers that move during vibration. Its pliable cover supports the wave-like motion needed for efficient vibration.
Fundamental frequency : The repetition rate of a periodic sound, perceived in voiced speech chiefly as pitch. Fold vibration rate sets the fundamental frequency of voiced sound.
Breathing : The movement of air into and out of the lungs through the respiratory system. During ordinary breathing, the folds are generally apart rather than vibrating together.
Glottis : The space between the vocal folds, whose shape changes during breathing and sound production. Its changing opening determines how air passes between the folds.
Lamina propria : A layer of connective tissue beneath an epithelial surface, including within the vocal folds. Its distinct layers contribute to the folds’ flexibility and vibration.
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