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- W2010756903 abstract "The scattering of sound by reflecting surfaces is an important feature in room acoustics. The boundary element method has been shown in the past to be an accurate method to calculate the scattering pattern of complex surfaces. However, this numerical method is expensive to use on large surfaces where a large number of elements is required. This paper proposes a method of reducing the number of boundary elements required to model large, but periodic, structures. The method is based on a consideration of the relationship between the field variables at two points exactly one period apart. The problem is reduced to the modeling of just one period of the structure. In cases of plane-wave incidence, the prediction using this method agrees very well with the prediction obtained by modeling the complete structure. With the point source in the near field of the surface, the incidence field is no longer periodic and the assumption of a constant periodic factor does not hold. In this case, it is shown that the method can still be used with a simple modification to the periodic formulation, and produces good agreements with the full structure predictions and with measurements." @default.
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- W2010756903 date "1999-02-01" @default.
- W2010756903 modified "2023-09-26" @default.
- W2010756903 title "A boundary integral formulation for the prediction of acoustic scattering from periodic structures" @default.
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- W2010756903 doi "https://doi.org/10.1121/1.426267" @default.
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