PATCH NEAR-FIELD ACOUSTIC HOLOGRAPHY BASED ON PRESSURE ACOUSTIC RADIATION MODES

摘要

To improve the reconstruction accuracy and resolution in Near-field acoustic holography with small aperture, a patch NAH based onpressure acoustic radiation modes is put forward. Firstly, the filter property of acoustic radiation mode is utilized to extrapolate hologram with small number of measurement points. Then, information is reconstructed with the extrapolated data. The numerical simulation results indicate that reconstruction accuracy and resolution can be improved effectively by using the presented method.