Binaural sound localizer for azimuthal movement detection based on diffraction.
Binaural sound localizer for azimuthal movement detection based on diffraction.
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DOI：
10.3390/s120810584
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Choi A
中科院分区：
文献类型：
--
作者：
Kim K;Choi A
声定位可以通过各种方法利用声学物理来实现。本文提出了一种基于两个接收器之间的耳间水平差（ILD）的声源方位运动检测结构。系统中的麦克风之一被各种高度的障碍物包围，以便投射入射信号的方向相关衍射。结构化和非结构化麦克风之间的ILD的梯度分析表明，声源的旋转方向为顺时针、逆时针和无旋转。对不同类型声源在大范围目标运动情况下的声学实验表明，该方法的平均真阳性率和假阳性率分别为67%和16%。频谱分析表明，低频率降低了真阳性率和假阳性率，而高频率总体上提高了这两种率。
Sound localization can be realized by utilizing the physics of acoustics in various methods. This paper investigates a novel detection architecture for the azimuthal movement of sound source based on the interaural level difference (ILD) between two receivers. One of the microphones in the system is surrounded by barriers of various heights in order to cast the direction dependent diffraction of the incoming signal. The gradient analysis of the ILD between the structured and unstructured microphone demonstrates the rotation directions as clockwise, counter clockwise, and no rotation of the sound source. Acoustic experiments with different types of sound source over a wide range of target movements show that the average true positive and false positive rates are 67% and 16%, respectively. Spectral analysis demonstrates that the low frequency delivers decreased true and false positive rates and the high frequency presents increases of both rates, overall.
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