Upper level: b3 Voice and speech functions
Functions of the production of various sounds by the passage of air through the larynx.
(additional explanation: It is a production life function according to the air that passes the larynx as for various sounds. )
Inclusions: functions of production and quality of voice; functions of phonation, pitch, loudness and other qualities of voice; impairments such as aphonia, dysphonia, hoarseness, hypernasality and hyponasality
Exclusions: mental functions of language (b167); articulation functions (b320)
Lower livel: