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The myoelastic theory states that when the vocal cords are brought together and breath pressure is applied to them, the cords remain closed until the pressure beneath them, the subglottic pressure, is sufficient to push them apart, allowing air to escape and reducing the pressure enough for the muscle tension recoil to pull the folds back together again.
The vocal folds are commonly referred to as vocal cords, and less commonly as vocal flaps or vocal bands. The term vocal cords was coined by the French anatomist Antoine Ferrein in 1741. In his violin analogy of the human voice , he postulated that the moving air acted like a bow on cordes vocales . [ 43 ]
The lungs, the "pump" must produce adequate airflow and air pressure to vibrate vocal folds. The vocal folds (vocal cords) then vibrate to use airflow from the lungs to create audible pulses that form the laryngeal sound source. [1] The muscles of the larynx adjust the length and tension of the vocal folds to 'fine-tune' pitch and tone.
Vocal fold paresis describes the weakness of the PCA and an impairment to its functioning. [22] Unilateral vocal fold paresis is the term used when there is damage to the RLN on one side of the body. [7] In unilateral vocal fold paresis, there is a lack of nerve supply to one side of the vocal fold's PCA muscle.
Because the vocal folds are the source of phonation and below the oro-nasal vocal tract, a number of glottal consonants are impossible such as a voiced glottal stop. Three glottal consonants are possible, a voiceless glottal stop and two glottal fricatives, and all are attested in natural languages. [13] Glottal stops, produced by closing the ...
The production of speech is a highly complex motor task that involves approximately 100 orofacial, laryngeal, pharyngeal, and respiratory muscles. [2] [3] Precise and expeditious timing of these muscles is essential for the production of temporally complex speech sounds, which are characterized by transitions as short as 10 ms between frequency bands [4] and an average speaking rate of ...
When the vocal cords come apart, the voice sounds breathy. At any time, the voice can go from a soft, breathy whisper to a strained hoarse sound, shaking or even breaking, as certain sounds are ...
The vocal timbres created by physical changes in the vocal fold vibrations and muscular changes in the laryngeal muscles are known as glottal configurations. [11] These configurations happen as a result of adduction and abduction of the glottis. A glottal configuration is the area in which the vocal folds come together when phonating.