The invention belongs to the technical field of mechanical structure sound
radiation signal processing, and discloses a
sound field reconstruction method based on
planar array scanning, which comprises the following steps of: performing stepping scanning in a spatial two-dimensional direction by using a small
planar array to obtain
sound pressure data of scanning planar arrays at different positions; overlapping measurement is carried out in adjacent areas of the scanning area arrays, and
phase deviation caused by non-simultaneous measurement between
sound pressure values of the adjacent scanning area arrays is calculated; and by averaging the
sound pressure amplitudes at the overlapping positions, the complex sound
pressure data on all the scanning area arrays are combined to the synthetic measurement surface. And the sound pressure value of the synthetic measurement surface is combined with a near-field
acoustical holography method based on
Fourier transform to realize reconstruction of a space
sound field. According to the method, the
sound field measurement and reconstruction in a larger range are completed by using fewer measuring points, the number of required acoustic sensors is small, the
measurement cost is low, the sound field reconstruction precision is high, the calculation speed is high, the window effect problem in a traditional sound field
reconstruction method is effectively avoided, and the size modulation of a synthetic measurement surface is realized.