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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.
Spasmodic dysphonia, also called laryngeal dystonia, is a voice disorder. It is characterized by involuntary spasms or movements in the muscles of the larynx (voice box) that cause the voice to break, and have a tight, strained, or strangled sound.Difficulties that result from spasmodic dysphonia range from occasional problems with saying a word or two to complete inability to communicate.dductor spasmodic dysphonia. This is the most common type and is characterized by sudden involuntary spasms that cause the vocal cords to slam together and stiffen. The spasms interfere with vibration of the vocal cords and production of sound is difficult.