Abstract
Some common sources of noise in large industrial and marine high-speed gears are described. Several methods, including instrumentation and test procedures, for the identification of such noise sources are discussed. Reduction of noise from gears is usually achieved by one or more of three primary methods, which are, in order of preference: (a) reduction of source mechanisms, (b) alteration of structureborne noise transmission paths, and (c) alteration of airborne noise transmission paths. A case history of a typical investigation from identification of the source through the confirmation of the effectiveness of the control measures adopted is presented in detail.
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