Voice is the sound produced by movement of the vocal folds or vocal cords located in the larynx (LAR-inks), commonly called the voice box. Voice is produced when the vocal folds vibrate rapidly as air is exhaled from the lungs. The vocal folds can stretch or shorten to raise or lower the pitch.
A voice disorder occurs when the quality, pitch or loudness calls attention to itself rather than to what the speaker is saying. It is also a problem if the speaker experience pain or discomfort when speaking or singing.