In phonetics, the term

airstream mechanism

refers to the method of air travel by which a sound is produced. There are four types of airstream mechanisms:

pulmonic_egressive - where a sound is articulated by pushing air out of the lungs and through the vocal tract, rather than from the glottis or the mouth.

glottalic_egressive - where a sound is produced by pushing air out of the glottis, rather than from the lungs.

glottalic_ingressive - where a sound is produced by sucking air into the glottis, rather than pushing it out.

velaric_egressive - where a sound iis produced by movement of mouth air by action of the tongue, rather than air from the glottis or the lungs. Most languages use the pulmonic egressive mechanism exclusively.

See also

manner_of_articulation

list_of_phonetics_topics

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