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Separation of radiated sound field components from waves scattered by a source under non-anechoic conditions.

机译:在非消声条件下将辐射声场分量与源散射的波分离。

摘要

A method of estimating the sound field radiated by a source under non-anechoic conditions has been examined. The method uses near field acoustic holography based on a combination of pressure and particle velocity measurements in a plane near the source for separating outgoing and ingoing wave components. The outgoing part of the sound field is composed of both radiated and scattered waves. The method compensates for the scattered components of the outgoing field on the basis of the boundary condition of the problem, exploiting the fact that the sound field is reconstructed very close to the source. Thus the radiated free-field component is estimated simultaneously with solving the inverse problem of reconstructing the sound field near the source. The method is particularly suited to cases in which the overall contribution of reflected sound in the measurement plane is significant.
机译:已经研究了一种在非消声条件下估算声源辐射声场的方法。该方法基于在源附近的平面中压力和粒子速度测量值的组合使用近场声全息术,以分离出出射波分量和入射波分量。声场的输出部分由辐射波和散射波组成。该方法利用问题的边界条件重建声场,使其非常靠近声源,从而根据问题的边界条件补偿了输出场的散射分量。因此,在解决在声源附近重建声场的逆问题的同时,估计了辐射的自由场分量。该方法特别适合于反射声在测量平面中的总体贡献很大的情况。

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