1968-02-01

Methods and Problems in Noise Reduction on High Speed Diesel Engines 680407

This paper describes a newly constructed research facility which was specifically designed for noise reduction work on internal combustion engines.Various approaches for reducing engine noise are discussed, and a method which permits locating individual sources of structure-borne sound is reviewed. A measuring system for airborne sound, radiated from the engine surfaces, is described. Some new findings and new problems encountered in noise reduction work are discussed.

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