Part I - Communicative functions of the voice: an introduction. The larynx and upper respiratory tract. The lower respiratory tract. Normal voice and phonation. Voice mutation: infancy to senescence. Part II - Voice disorders. Presentation and classification. Hyperfunctional dysphonia. Psychogenic voice disorders. Vocal tract structural abnormalities: congenital and acquired. Neurogenic voice disorders. Laryngeal disease, inflammatory conditions and diseases affecting the vocal tract. Part III - Voice therapy: the process. Analysis and evaluation: perceptual and instrumental. Management and treatment: principles and techniques. Specific techniques. Specific intervention: children, the elderly, singers. Laryngeal carcinoma: presentation and management.