NOISE PROBLEMS IN SEAGOING SHIPS

After mentioning some early work on noise reduction in ships, and the greater need for such reduction with today's propulsion machinery, the Author, of the See-Berufsgenossenschaft (the SBG), gives some general information on the effects of noise on the human ear and the significance of the dB(A) value in this respect. This is followed by a short list of noise regulations and recommendations issued by several different authorities in and outside Germany, together with a table of maximum dB(A) values for the different areas in a ship as stipulated by various countries. The sources of noise (main engines, propellers, auxiliary engines, gearing, hydraulic pumps and motors, compressors, etc.) and a number of alleviating measures are listed, and these measures in particular those which attack the course of the noise, are then discussed in more detail under the headings: Diesel Engines--Noise Generation and Protective Measures; Design Measures for Reduced Noise from Diesel Engines; Turbochargers and Scavenge-Air Ducting; Noise-Protection Measures near the Machinery; Measures for Reducing Structure-Borne Noise due to Diesel Engines; Exhaust Noise Dampers; Flexible Mounting of Exhaust Noise-Dampers and piping; Gearing; Auxiliary Machinery; Propellers and Stern Design; Noise-Reduction Measures for Accommodation Areas. Risk of accident through alarms not being heard in a noisy environment is briefly discussed. The results are included of a number of engine-room noise measurements carried out by the SBG; these results, which allow some comparisons to be made between different ships and between different engines, are discussed, together with a summary of accommodation noise measurements that show some progress in noise reduction during the period 1970--77. The need for further efforts to reduce shipboard noise, and the outlook for the future, are briefly examined. Order from: BSRA as No. 47,987.

  • Corporate Authors:

    Schroedter (C) and Company

    Stubbenhuk 10
    Hamburg 11,   Germany 
  • Authors:
    • Wragge, F
  • Publication Date: 1977-11

Language

  • German

Media Info

  • Features: References;
  • Pagination: 7 p.
  • Serial:
    • HANSA
    • Volume: 114
    • Issue Number: 22
    • Publisher: Deutsche Bahn AG

Subject/Index Terms

Filing Info

  • Accession Number: 00174266
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: May 31 1978 12:00AM