NOISE EMISSION OF ROAD VEHICLES: RECONSTITUTION OF THE ACOUSTIC SIGNATURE

The paper describes a model that can be used to reconstitute the acoustic signature (sound pressure level) of a moving road vehicle. Account is taken of the Doppler and ground effects and of the directional characteristics of the noise emitted by the vehicle. The variations of the usual noise indices (maximum noise level, equivalent noise level due to the passing by of the vehicle) with the different parameters concerned, as determined by the model, are considered and such variations compared with experimental results. It is shown, on the basis of the assumptions made, how a monopole source provides a good representation of a road vehicle. Finally an evaluation is made of the accuracy with which the apparent acoustic power of a vehicle can be determined. (Author/TRRL)

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  • Corporate Authors:

    Academic Press Incorporated

    24-28 Oval Road
    London NW1 7DX,   England 
  • Authors:
    • Favre, B M
    • Gras, B T
  • Publication Date: 1984-3

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Filing Info

  • Accession Number: 00387990
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Nov 30 1984 12:00AM