Study on the holography reconstruction of the radiated acoustic field of the structure sound source with large scale

In order to achieve the holography reconstruction of the radiated acoustic field of the structure sound source with large-scale and local aperture measurements, Patch NAH based on the fast Fourier transformation method was systematically studied. To verify the accuracy of the algorithm, the infinite baffle plate is selected, under harmonic excitation. The effect of the length of the zero padding and the iterative numbers on the sound field reconstruction were analyzed; In order to obtain the amplitude of the entire sound field, the method of the combination measurement and the space matching were proposed, and the simply supported plate was divided into four regions, the sound pressure within each area was reconstructed by the method of the Patch NAH; According to the positional relationship of the sound field, a more accurate sound field distribution of the entire simply supported plate was reconstructed. The simulation and experimental results showed that the radiated acoustic field of the structure sound source with large scale could be reconstructed accurately and effectively by the Patch NAH and the space matching with local aperture measurement.