Scanning Measurement Based on FISTA Phase Calibration

Scanning measurement is a standard array measurement method in the process of sound reconstruction. This method is widely used because it only requires a small number of microphones but can achieve larger aperture and dense array measurement by scanning. In the actual application of scanning measurement, the phase calibration of the measurement surface complex pressure is a key problem needed to be solved. The commonly used phase calibration method is the single reference transfer function (SRTF) method, but the calibration accuracy cannot meet the requirements under noise interference. In this paper, the fast iterative shrinkage thresholding algorithm (FISTA) based cross-spectrum matrix complement method is used for the phase calibration of the surface complex pressure, which can obtain a better sound reconstruction results under the condition of low signal-to-noise ratio (SNR). The effectiveness of the method is verified by simulation and experiments.