Noise has become an increasingly noticeable and significant symptom of our civilization. Fundamentally an acoustic phenomenon, noise has wider implications. It is the legitimate object of scientific investigations in the fields of psychology and physiology. It can be properly evaluated by its role in music and in general aesthetics. It leads to basic questions of sociology. We shall pursue the implications in these various fields one by one. In this process, as elsewhere, music provides the bridge from facts to commitments (...) . Siegmund Levarie is professor of music at the City University of New York. The author of books on Mozart, Guillaume de Machaut, harmony, and Italian music, he has also collaborated with Ernst Levy on Tone: A Study in Musical Acoustics and the forthcoming A Dictionary of Musical Morphology. (shrink)