Sound and vibration data measured on a combination diesel gas turbine propulsion system in a 2000-ton antisubmarine warfare ship are presented. The data can be considered representative of the noise levels, both structureborne and airborne, that can be expected in an installation of this or a similar type. Examples of the attenuation of structureborne noise through selected structural joints illustrate the vibration isolation attainable through the use of lightweight aircraft-type structures.

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