by non-linearities and the LEE may no longer be the appropriate mathematical model. Pseudospectral A Fourier pseudospectral time-domain method can be applied to wave propagation problems pertinent to computational aeroacoustics. The original algorithm of the Fourier pseudo spectral time domain method works for periodical problems without the interaction with physical boundaries. A slip wall boundary condition, combined with buffer zone technique to solve some non-periodical aeroacoustic problems has been proposed. Compared to other computational methods, pseudospectral method is preferred for its high-order accuracy. EIF Expansion about Incompressible Flow APE Acoustic Perturbation Equations Refer to the paper "Acoustic Perturbation Equations Based on Flow Decomposition via Source Filtering" by R.Ewert and W.Schroder. See also Aeroacoustics Acoustic theory References Sources Lighthill, M. J., "A General Introduction to Aeroacoustics and Atmospheric Sounds", ICASE Report 92-52, NASA Langley Research Centre, Hampton, VA, 1992 External links Examples in Aeroacoustics from NASA Computational Aeroacoustics at the Ecole Centrale de Lyon Computational Aeroacoustics at the University of Leuven Computational Aeroacoustics at Technische Universität Berlin A CAA lecture script of Technische Universität Berlin Computational fluid dynamics Acoustics Aerodynamics Mechanics Computational fields of study