| Citation: | LI Mengxuan, YANG Mingsui, MA Wei. Influence of different interpolation methods on sound source localization of incomplete microphone array[J]. Journal of Aerospace Power, 2023, 38（2）：394-407 doi: 10.13224/j.cnki.jasp.20210431
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The sound source localization algorithm using incomplete microphone arrays was studied, and the sound source localization algorithm was obtained through interpolation compensation of the cross spectral matrix of the incomplete microphone array by modified Fourier interpolation, B-spline interpolation and cubic spline interpolation. The sound source localization algorithm was verified by numerical simulation, and it was found that the maximum deviation of the Fourier interpolation simulation result was 5.21 dB, the B-spline interpolation was 1.17 dB, and the cubic spline interpolation was 0.80 dB on the beamforming sound source intensity; in the sound source position deviation, the Fourier interpolation value was 0.04 m, the B-spline interpolation value was 0.01 m, and the cubic spline interpolation value was 0.01 m. The results showed that the intensity, position accuracy and dynamic performance of the sound source localization calculated by Fourier interpolation were the worst, the cubic spline interpolation was the best, and the B-spline interpolation had the average performance. Experimental verification has also reached a similar conclusion, so it is best to use cubic spline interpolation to calculate the cross spectral matrix of an incomplete microphone array.
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