INTERNAL NOISE REDUCTION IN HOVERCRAFT

The aim of this paper is to summarize the results of several years work on the internal noise of hovercraft. The basic mechanism of noise production is described and methods for controlling it are put forward. A case history is also described. Internal noise measurements from other forms of transport are compared to those of hovercraft and it is shown that comparatively small overall noise reductions of 4 dBA would make the internal noise the same as that of short-haul jet aircraft. Larger reductions of 10 dBA would be needed to match the noise levels in current public service vehicles. Structure-borne noise is shown to be a major source of noise in at least one current production craft. Low structural damping combined with lightweight and rigidly mounted machinery are found to be the major causes of structure-borne noise, and vibration isolation of major machine elements has produced substantial (10 dBA) reductions in internal noise levels.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0022460X
• Corporate Authors:

  Academic Press Incorporated

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  London NW1 7DX,   England 
• Authors:
  • Anderton, D
• Publication Date: 1972-6-8

Media Info

• Pagination: p. 343-359
• Serial:
  • Journal of Sound and Vibration
  • Volume: 22N3
  • Publisher: Elsevier
  • ISSN: 0022-460X
  • EISSN: 1095-8568
  • Serial URL: http://www.sciencedirect.com/science/journal/0022460X

Subject/Index Terms

• TRT Terms: Air cushion vehicles; Marine transit; Noise; Noise control; Ships; Structural analysis
• Uncontrolled Terms: Noise reduction
• Old TRIS Terms: Hovercraft noise; Shipboard noise; Structure-borne noise
• Subject Areas: Environment; Marine Transportation; Public Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00034915
• Record Type: Publication
• Source Agency: United States Merchant Marine Academy
• Files: TRIS
• Created Date: Oct 27 1978 12:00AM