INVESTIGATIONS OF ROAD TRAFFIC NOISE BASED ON AN EXPONENTIALLY DISTRIBUTED VEHICLES MODEL - SINGLE LINE FLOW OF VEHICLES WITH SAME ACOUSTIC POWER

A simplified model of traffic flow was assumed in which vehicles regarded as point sources of equal acoustic power are distributed on an infinite line in such a way that the spacing between successive vehicles has a probability density function (pdf) of an exponential type. Based on the model, approximate expressions for the pdf, mean, and variance of the sound pressure level (spl) at an observation point were obtained semi-empirically. They are shown in equations as functions of the average spacing (s) of successive vehicles and distance (D) from an observation point to the line. Simulated calculations by means of the Monte Carlo method were also carried out in order to obtain the histogram, mean, and variance of the spl distribution for various values of s and D. There is good agreement between the results derived and those of the simulated calculations

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    Academic Press Incorporated

    Berkeley Square House, Berkeley Square
    London W1,   England 
  • Authors:
    • Takagi, K
    • Hiramatsu, K
    • Yamamoto, T
    • Hashimoto, K
  • Publication Date: 1974-10-8

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Filing Info

  • Accession Number: 00083258
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: May 29 1975 12:00AM