| Summary: | The world of sounds and the sense of hearing are the subjects of this book. It analyzes the physical nature of sound, describes the way ear and brain translate vibrations into music, information or noise and shows how man's understanding of sound and hearing have enable him to put them to use for both practical and esthetic purposes. In text chapters and picture essays, the book traces the evolution of hearing in the animal kingdom, demonstrating its importance not only to man but to species for which it is the major mechanism of survival. Each text chapter is followed by a picture essay. Although the two can be read independently, each picture essay supplements the chapter it follows. Thus Chapter 2, "The Machinery of Hearing," is followed by an essay picturing in detail the structure of the human ear.
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