The invention aims at providing a
sound field rebuilding method. The
sound field rebuilding method comprises the following steps that firstly, a
sound pressure value of a measuring face in a measuring
sound field is measured; secondly, different
sound sources are endowed with a certain weight through the
centroid method according to the actual positions of the
sound sources and the
sound intensity, the positions and number of multi-ball
virtual source intensities and the position coordinates of each virtual ball are calculated; thirdly,
zero filling expanding is carried out on the measured
sound pressure value of the measuring face to obtain the
sound pressure value of an expanding face of the measuring face; fourthly, a
transfer matrix between the sound pressure value of the expanding face of the measuring face and the virtual ball sound pressure is calculated; fifthly, a
transfer matrix between the sound pressure value of a rebuilding face and the sound pressure value of the multi-ball virtual equivalent source intensities is built; sixthly, the
transfer matrix obtained in the fourth step and the transfer matrix obtained in the fifth step are combined, and the sound pressure value of the rebuilding face is obtained. According to the sound field rebuilding method, multi-ball region two-dimensional fast Fourier conversion
algorithm is introduced, a
virtual source intensities configuration and the measuring face do not need to be conformal, and the calculation efficiency and calculation precision are very high.