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• W4387573405 abstract "Sidelobe suppression is a major challenge in wideband beamforming for acoustic research, especially in high noise and reverberation environments. In this paper, we propose a multi-objective NSGA-II wideband beamforming method based on a spherical harmonic domain for spherical microphone arrays topology. The method takes white noise gain, directional index and maximum sidelobe level as the optimization objectives of broadband beamforming, adopts the NSGA-II optimization strategy with constraints to estimate the Pareto optimal solution, and provides three-dimensional broadband beamforming capability. Our method provides superior sidelobe suppression across different spherical harmonic orders compared to commonly used multi-constrained single-objective optimal beamforming methods. We also validate the effectiveness of our proposed method in a conference room setting. The proposed method achieves a white noise gain of 8.28 dB and a maximum sidelobe level of −23.42 dB at low frequency, while at high frequency it yields comparable directivity index results to both DolphChebyshev and SOCP methods, but outperforms them in terms of white noise gain and maximum sidelobe level, measuring 16.14 dB and −25.18 dB, respectively." @default.
• W4387573405 created "2023-10-13" @default.
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• W4387573405 date "2023-10-12" @default.
• W4387573405 modified "2023-10-13" @default.
• W4387573405 title "Multi-Objective NSGA-II Optimization for Broadband Beamforming with Spherical Harmonic Domain Assistance" @default.
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• W4387573405 doi "https://doi.org/10.3390/s23208403" @default.
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