PREDICTION OF LOW FREQUENCY SOUND PRESSURE DISTRIBUTION INSIDE A VERTICAL PASSENGER COMPARTMENT FROM ITS STRUCTURAL DYNAMIC RESPONSE

This paper describes a study of the mechanism of noise generation by vibrating structures. A theory is developed from the well-established "simple-source" theory for the propagation of sound from a vibrating structure, provided that the vibration profile of the structure is known in detail. Experimental computer-based control and analysis techniques have been developed on an on-line basis to apply the theory developed to vehicle body structures. Some results from a simple box structure and a small sports saloon car structure are presented to illustrate the techniques and demonstrate the level of accuracy achieved by comparing experimental and theoretical results. (Author/TRRL)

• Corporate Authors:

  Modino Press Limited

  50 Pine Grove
  London N2O 8LA,   England 
• Authors:
  • Dunn, J W
  • OLATUNBOSUN, O A
  • Mills, B
• Publication Date: 1980-9

Media Info

• Features: Figures; References;
• Pagination: p. 11-16
• Serial:
  • Society of Environmental Engineers, Journal of
  • Volume: 19-3
  • Issue Number: 86
  • Publisher: Society of Environmental Engineers

Subject/Index Terms

• TRT Terms: Accuracy; Automobiles; Digital computers; Dynamic loads; Evaluation and assessment; Forecasting; Information processing; Low frequency; Mathematical analysis; Motor vehicle bodies; Pressure; Sound; Vehicles; Vibration
• Uncontrolled Terms: Dynamic response; Pressure distribution
• Old TRIS Terms: Automobile bodies
• ITRD Terms: 6471: Analysis (math); 1243: Car; 8673: Digital computer; 9020: Evaluation (assessment); 132: Forecast; 6748: Sound; 1255: Vehicle; 5558: Vibration
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00334082
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Sep 16 1981 12:00AM