The vocal tract is the cavity in human beings and in animals where sound that is produced at the sound source (larynx in mammals; syrinx in birds) is filtered.
In birds it consists of the trachea, the syrinx, the oral cavity, the upper part of the esophagus, and the beak. In mammals it consists of the laryngeal cavity, the pharynx, the oral cavity, and the nasal cavity.
The estimated average length of the vocal tract in adult male humans is 16.9 cm and 14.1 cm in adult females.
Famous quotes containing the words vocal and/or tract:
“With sweet May dews my wings were wet,
And Phoebus fir’d my vocal rage;
He caught me in his silken net,
And shut me in his golden cage.
He loves to sit and hear me sing,
Then, laughing, sports and plays with me;
Then stretches out my golden wing,
And mocks my loss of liberty.”
—William Blake (1757–1827)
“If a theme or idea is too near the surface, the novel becomes simply a tract illustrating an idea.”
—Elizabeth Bowen (1899–1973)