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


  • 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