Voice 

Voice is produced when the vocal cords come close together and air from the lungs vibrates the vocal cords

A voice disorder may include:

Inappropriate pitch (e.g. a voice that is too high or too low, considering the client’s age and gender)    

Inappropriate loudness (e.g. too loud or too soft)

Inappropriate quality (e.g. a hoarse voice)

Total voice loss A voice disorder may result from damage to the vocal cords due to misuse (e.g. yelling, talking too much or talking too -loudly)    

Abuse (e.g. excessive throat clearing, coughing, or smoking).

Misuse and abuse causes changes to the vocal cords that may result in vocal nodules, polyps, or contact ulcers.

A voice disorder can also result from diseases including cancer, vocal fold paralysis, or chronic laryngitis. Some conditions that occur at birth such as cleft palate, cerebral palsy or a hearing impairment, can cause voice disorders.