SOURCE STRENGTH, TRANSMISSION AND ISOLATION OF PROPELLER NOISE

The Authors discuss the results of investigations in which the source strengths of two propellers were measured using a novel technique based on the reciprocity principle. It is shown that this technique has a great potential especially in conjunction with modern signal processing techniques. The results of two types of experiments are presented: 1) Full-scale measurements of the acoustical source strength of cavitating propellers. 2) Model-scale measurements of the insertion loss of various compliant full coating configurations. For the hull coating investigations the variables were the area of the layer, the distance between the sound source and the ship's hull (source clearance) and the receiving position inside the ship. Area and source clearance proved to be the most important factors; the position inside the ship had no significant effect on the insertion loss. Order from: BSRA as No. 48,232.

• Corporate Authors:

  Technisch Physische Dienst TNO-TH

  Stieltjesweg 1, Postbus 155
  Delft 2208,   Netherlands 
• Authors:
  • Bruijn, A D
  • Wolde, T T
• Publication Date: 1976

Media Info

• Features: References;
• Pagination: 23 p.

Subject/Index Terms

• TRT Terms: Cavitation noise; Coatings; Hulls; Measurement; Noise; Noise sources; Propellers; Sound level; Sound transmission
• Uncontrolled Terms: Noise measurement; Ship hulls
• Old TRIS Terms: Cavitating propellers; Coating performance; Noise intensity
• Subject Areas: Environment; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00177061
• Record Type: Publication
• Source Agency: British Ship Research Association
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jun 28 1978 12:00AM