NOISE REDUCTION WITH CONSTRAINED VISCO-ELASTIC LAYERS: A CASE HISTORY

An experiment of applying visco-elastic layers as a noise reduction means at a late stage of ship construction is described. The ship to which these layers were applied has a sister ship on which high noise levels had been measured in the after cabins during trials. In the most unfavourably located cabin a noise level of 74 dB(A) had been measured. For this reason, the experiments with visco-elastic layers were performed in a similar location on the partially-completed ship. It was found that the sound level was reduced 4-5 dB(A) following the application of a 1 mm visco-elastic layer. Order from: BSRA as No. 48,244.

• Supplemental Notes:
  • Proceedings of the International Symposium on Shipboard Acoustics, held at Noordwijkerhout, September 6-10, 1976.
• Corporate Authors:

  Technisch Physische Dienst TNO-TH

  Stieltjesweg 1, Postbus 155
  Delft 2208,   Netherlands 
• Authors:
  • KIHLMAN, T
• Publication Date: 1976

Media Info

• Pagination: 3 p.

Subject/Index Terms

• TRT Terms: Damping (Physics); Measurement; Noise; Noise control; Ships
• Uncontrolled Terms: Noise measurement; Noise reduction; Ship noise
• Subject Areas: Environment; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00177223
• Record Type: Publication
• Source Agency: British Ship Research Association
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jun 28 1978 12:00AM