Simulation of the acoustics behind a wall due to a moving vehicle

Magnus Åberg, Robert-Zoltán Szász, Laszlo Fuchs

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review


The influence of a barrier on the acoustic field is investigated using an expansion of the compressible Navier-Stokes equations. Large Eddy Simulations (LES) is used to account for the acoustical sources and the equation for the acoustic density fluctuation accounts for the propagation of the acoustics waves. This combined approach enhances numerical efficiency while maintaining good accuracy. The problem under consideration is related to the spreading of noise due to a moving vehicle and the effects of a noise barrier on the Sound Pressure Level (SPL) and spectral composition. These parameters are computed for several configurations of the barrier in terms of height and distance from the vehicle. The main results show that there can be acoustic modes in resonance between the barrier and vehicle and that barrier height has an effect on SPL that is intuitive. Copyright
Original languageEnglish
Title of host publicationCollection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics
ISBN (Print)1563478099
Publication statusPublished - 2006
Event12th AIAA/CEAS Aeroacoustics Conference - Cambridge, MA, United States
Duration: 2006 May 82006 May 10

Publication series



Conference12th AIAA/CEAS Aeroacoustics Conference
Country/TerritoryUnited States
CityCambridge, MA

Subject classification (UKÄ)

  • Fluid Mechanics and Acoustics


  • Sound Pressure Level (SPL)
  • Large Eddy Simulations (LES)
  • Acoustic density fluctuation
  • Noise barrier


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