Voice disorders are medical conditions involving abnormal pitch, loudness or quality of the sound produced by the larynx and thereby affecting speech production. These include: * Puberphonia * Chorditis * Vocal fold nodules * Vocal fold cysts * Vocal cord paresis * Reinke's edema * Spasmodic dysphonia * Foreign accent syndrome * Bogart–Bacall syndrome * Laryngeal papillomatosis * Laryngitis