用心形麦克风阵列实现50Hz-20kHz宽带声源定位，精度更高
Broadband Acoustic Intensity Direction Estimation with Tight-Frame Cardioid Arrays
- 采用紧框架心形麦克风对，优化空间布局提升方向估计性能
- 在50Hz至20kHz频段内实现高精度方向估计，24麦克风短间距方案误差更小
- 适用于多干扰源环境下的实时声源跟踪，适合语音增强与沉浸式音频
本研究实验考察了基于成对心形麦克风的声强法进行声源方向估计，重点关注称为紧框架的均衡排列方式。在6个或24个麦克风位置测量脉冲响应，对比两种相反方向的麦克风间距。评估了单声源、来自两个正交方向的相干干扰波，以及多个方向干扰波存在下的方向跟踪性能。结果表明，在50 Hz至20 kHz范围内实现了宽带声强方向估计，24麦克风配置与较短间距通常带来更小的误差。
原文摘要 · Abstract (English)
This study experimentally investigates source-direction estimation from acoustic intensity using paired cardioid microphones, with particular emphasis on well-balanced arrangements known as tight frames. Impulse responses were measured at 6 or 24 microphone positions, and two opposed-pair spacings were examined. The resulting arrays were evaluated for a single source, coherent interference between waves arriving from two orthogonal directions, and directional tracking in the presence of interfering waves from multiple directions. The results demonstrate broadband acoustic-intensity direction estimation from 50 Hz to 20 kHz, with the 24-microphone arrangement and the shorter spacing generally providing smaller errors.
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