In order to improve the sound field synthesis quality of the sound source in the region of interest

a non-uniform secondary source distribution method for sound field analysis and synthesis is proposed. First

the sampling of the continuous secondary source is divided into two different sampling regions. With a certain number of loudspeakers

the number of samples in the region of interest is increased and the number of samples outside the region of interest is reduced. Then

using the Hermitian characteristic of the sampling aliasing matrix

Rayleigh entropy is used to estimate the maximum error of different non-uniform sampling schemes to guide the selection of non-uniform sampling schemes. Finally

the frequency domain calculation method of the driving signal for the non-uniform secondary source distribution is obtained. The experimental results show that the proposed non-uniform distribution method improves the aliasing-free radius by 12.9%~22.6% for the sound sources from the region of interest under the 2.5D circular boundary condition

compared with the optimal modal bandwidth of the uniform distribution. The effectiveness of the proposed method is verified.