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Voice Disorders. A voice disorder is when the voice has a problem with pitch, volume, tone, and other qualities. These problems occur when the vocal cords don't vibrate normally. Your voice is the sound that air makes when it is forced out of your lungs and passes over your vocal cords.
Causes of a voice disorder. Voice disorders can be caused by many factors. In some cases, the cause of a voice disorder is not known. Possible causes can include: Growths. In some cases, extra tissue may form on the vocal cords.