Obstruent

In phonetics, articulation may be divided into two large classes, obstruents and sonorants. An obstruent is a consonant sound formed by obstructing outward airflow, causing increased air pressure in the vocal tract.

Obstruents are subdivided into stops, fricatives, and affricates. Obstruents are prototypically voiceless, though voiced obstruents are common. This contrasts with sonorants, which are rarely voiceless.

See also

*list of phonetics topics
*Sonorant