通过自蒸散和同心圆麦克风阵列实现仰角和方位角的频率不变波束成形
摘要
平面和同心圆麦克风阵列在波束成形中的应用日益受到关注，因为它们能够优化仰角和方位角，使其成为声源定位和噪声抑制等空间音频任务的理想选择。与线性阵列不同，后者将驾驶限制在单个轴上，2D 阵列提供双轴优化，尽管仰角控制仍具有挑战性。本研究探索了将自蒸散工具与同心圆阵列集成，以施加波束宽度和频率不变约束。这使得能够在保持宽频范围性能的同时，对两个角度进行连续优化。我们通过仿真评估了波束宽度、白噪声增益和波束成形性能在多个频率上的情况。 presented a comparative analysis against standard and advanced beamformers, including delay-and-sum, modified delay-and-sum, a Jacobi-Anger expansion-based method, and a Gaussian window-based gradient descent approach. Our method achieves superior spatial selectivity and narrower mainlobes, particularly in the elevation axis at lower frequencies. These results underscore the effectiveness of our approach in enhancing beamforming performance for acoustic sensing and spatial audio applications requiring precise dual-axis control.
引用
@article{arxiv.2511.19403,
title = {Frequency-Invariant Beamforming in Elevation and Azimuth via Autograd and Concentric Circular Microphone Arrays},
author = {Jorge Ortigoso-Narro and Jose A. Belloch and Maximo Morales-Cespedes and Maximo Cobos},
journal= {arXiv preprint arXiv:2511.19403},
year = {2025}
}