Man is a communicating animal"" whose distinction is language, made possible by the existence of minute phenomena called sound waves. Sound ranges from the barely perceptible to the actually painful and is inextricably engaged with hi-fi, intelligence machines, speech, and telephones. Here is a rather technical compendium of all the sciences which deal with sound...electronics, speech therapy, psychophysics, communication theory, organics of sound. This synthesis is called psychoacoustics. Too detailed and specialized for the layman.