声全息分析噪声场的空间频域重建算法

Spacial frequency domain reconstruction method for acoustic holography analysis of noise fields

声全息方法是分析噪声场的一种有效手段。该文在基于空间面积分的声全息重建公式的基础上利用二维快速Fourier变换进行了快速的声场空间频域重建。在理论推导的基础上 ,进行了模拟实验和现场实验 ,两种实验均证明了空间频域重建算法的有效性。

Acoustic holography is an effective method to analysis noise fields. This article presents a spacial frequency domain reconstruction method based on the reconstruction formulation of acoustic holography using a plane integral. This method utilizes the 2 dimensional fast Fourier transform (FFT) technic to efficiently reconstruct the sound field. Simulations and automobile tests demonstrate the effectiveness of this reconstruction method.