A model is presented for the scattered acoustic field above a bulky rigid cuboid shape in a rigid plane insonified by an acoustic field. The Kobayashi Potential method and the image sources method were used in order to derive the scattered acoustic field in a modal form. The incident source was then decomposed into plane waves. The total scattered field was determined by summing all the elementary scattered fields. This model was compared to finite element modeling and experimental results for three bulky cuboid shapes in an infinite rigid screen and a rectangular corner insonified by a spherical source. A good agreement between numerical and experimental results was obtained supporting the validity of the model.

提出了一个模型，用于在被声场声穿透的刚性平面中的大体积刚性长方体形状上方的散射声场。使用小林势法和图像源法来导出模态形式的散射声场。然后入射源被分解为平面波。总散射场通过对所有基本散射场求和来确定。该模型与无限刚性屏幕中的三个大体积长方体形状和由球形源声穿透的矩形角的有限元建模和实验结果进行了比较。数值结果和实验结果之间取得了很好的一致性，支持了模型的有效性。