A DIRECTIONAL FACTOR FROM MOVING VEHICLES

The calculation of the directivity for the sound emission from moving vehicles is important for predicting the traffic noise by means of computer and to improve the protections design for noise reduction. The horizontal directivity of noise from moving vehicles can be calculated by a procedure and it is a function of the following data: vehicle speed, recorded signal and instant of passage from the receiver, relative humidity and atmospheric temperature. Furthermore, relationship between sound level, speed and angle has been analysed plotting polar diagrams from a random sample of light and heavy vehicles. The real problem has many difficulties. For instance the speed of the vehicles was not constant, the simultaneity of the emission with background noise, the micro-meteorological inhomogenities caused by the source when it is passing, and the impossibility of reproducing exactly each event. For the covering abstract see IRRD E104312.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0962207233
• Corporate Authors:

  Institute of Noise Control Engineering

  Iowa State University, 210 Marston Hall
  Ames, IA  United States  50011-2153
• Authors:
  • SOLANA QUIROS, P E
  • PICARD LOPEZ, M A
  • ARIZO SERRULLA, J V
• Conference:
  • PROCEEDINGS OF INTERNOISE 99 - THE 1999 INTERNATIONAL CONGRESS ON NOISE CONTROL ENGINEERING HELD IN FORT LAUDERDALE, FLORIDA, USA, 6-8 DECEMBER 1999, VOLUME 1
• Publication Date: 1999

Language

• English

Media Info

• Features: References;
• Pagination: p. 223-8

Subject/Index Terms

• TRT Terms: Diffusion (Optics); Mathematical analysis; Motion; Noise; Sound
• ITRD Terms: 6471: Analysis (math); 6769: Diffusion; 5483: Movement; 2492: Noise; 6748: Sound
• Subject Areas: Environment;

Filing Info

• Accession Number: 00790186
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-9622072-3-3
• Files: ITRD
• Created Date: Apr 11 2000 12:00AM