This book is a compendium arising from a conference of international scientists held at the State University of New York, Upstate Medical Center, in May 1961 to review phonatory physiology; to discuss neuromuscular mechanisms of hearing and speech; to explore the use of new research tools; and to identify unsolved problems in phonation. Besides chapters on basic anatomy, neurophysiology, and physics, there are chapters on electromyography of the laryngeal muscles of man and high speed photography and stroboscopy. Of special interest to the otolaryngologist are the sections on Relations With Hearing and Speech and on Pathology, Medical and Surgical Aspects.