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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.
Vocal cord paralysis is a type of voice disorder which occurs when either one vocal cord or both of the vocal cords failed to move, causing the person to experience certain problems of the voice such as swallowing and breathing.