SHIELDING OF NOISE FROM STATISTICALLY STATIONARY TRAFFIC FLOWS BY SIMPLE OBSTACLES

The effect of neighbouring, smooth obstacles on the sound generated by statistically stationary traffic movements is analysed for simple but realistic practical situations. Dimensions of obstacles like buildings are assumed much larger than the predominant, a-weighted wavelength of traffic noise so that diffraction may be neglected. The sound at any fixed receiver may then be resolved into two components. The direct component propagates unimpeded while the other arrives indirectly through specular reflections off the obstacle surfaces. Theory is compared wherever possible with experiment to estimate its accuracy and assess the importance of effects like diffraction. Typically employed building dimensions and spacings are varied theoretically and extremes of absorption are used to gauge their significance. /Author/TRRL/

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  • Corporate Authors:

    Academic Press Incorporated

    Berkeley Square House, Berkeley Square
    London W1,   England 
  • Authors:
    • Yeow, K W
    • Popplewell, N
    • MacKay, JFW
  • Publication Date: 1978-3-22

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Filing Info

  • Accession Number: 00178664
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM