From the information theory viewpoint, the combined neural and motor mechanisms of speech production serve as the primary information source in oral communication. While extensive studies of motor mechanisms in human physiology have been made during the past decade, there has been little advance in understanding the physiological processes of speech and in the development of instrumental techniques for the study of the physiology of speech. There is at present much opportunity for the development of basic physical theory of speech sound formation and for experimental research with modern electro‐acoustical instrumentation on speech generation. The research opportunities apply to all aspects of speech production, including respiration, phonation, articulation, and nasalization. In such studies, fundamental consideration must be given to the interactions of the mechanical and the acoustical aspects of speech sound production.