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Noise Reduction in Naval Machinery * 620505

To achieve satisfactory noise reduction of machinery used for military and industrial use, the problem ideally should be attacked at the source of noise production. However, in many cases it may not be possible to reduce effectively the source noise because of design and (or) economic considerations, and techniques such as transmission path control must be utilized.
This paper identifies noise source characteristics of mechanical and electrical equipment such as gas turbines, diesel engine, generators, motors, and their components. Reduction of vibration through balancing techniques is emphasized.


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