Jiayu Song, Chaoyi Wang, Huawei Liu, Baoqing Li, Xiaobing Yuan. An Adaptive Correction Method for Channel Inconsistency of Microphone Array[J]. Laser & Optoelectronics Progress, 2022, 59(17): 1707001
- Laser & Optoelectronics Progress
- Vol. 59, Issue 17, 1707001 (2022)
Fig. 1. Microphone array signal model
Fig. 2. Flow chart of simulated annealing algorithm
Fig. 3. Effect of inconsistent array channels. (a) Comparison chart; (b) signal spectrum with inconsistent array channels; (c) signal spectrum with consistent array channels
Fig. 4. Corrected signal spatial spectrum. (a) Correction result when the threshold is 0.001; (b) correction result when the threshold is 0.0001
Fig. 5. Uncorrected and directly corrected DOA estimation signal spectrum. (a) Uncorrected signal spectrum; (b) directly corrected signal spectrum
Fig. 6. Signal acquisition module block diagram
Fig. 7. Signal acquisition device
Fig. 8. Wheeled car signal spectrum
Fig. 9. Correction results of actual 4-element microphone array. (a) Signal spectrum before correction; (b) signal spectrum after correction
Fig. 10. Signal spectrum when channels are inconsistent
Fig. 11. Spectrogram of DOA estimation before and after correction
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Table 1. Comparison of actual direction and DOA results before and after correction
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