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Use of reflectedwavefronts for acoustic source localization with a line array

机译:使用反射波前通过线阵列定位声源

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This paper addresses the problem of acoustic source localization with a line microphone array. Although the device has a onedimensional geometry, in presence of reflected wavefronts within an enclosure it is possible to obtain good localization performance (even in terms of 3D coordinates) if the information provided by mutual delays between the arrivals of direct and reflected waves is exploited. Acoustic maps of a room with known reflecting surfaces are produced by matching the phase information measured by means of the array with a sound propagation model based on the image method. The here proposed method, MultiPath Global Coherence Field (MP-GCF), can be interpreted as a generalization of GCF.With MP-GCF the assumption that direct wavefronts dominate over reflections is not required anymore. Experiments performed with real data acquired in a reverberant room show that, using a line array, the proposed method largely outperforms the results obtained with GCF. Simulations were also carried out to investigate how performance changes under different environmental conditions.
机译:本文解决了使用线性麦克风阵列进行声源定位的问题。尽管该设备具有一维几何形状,但是如果利用了直接波和反射波到达之间相互延迟提供的信息,则在外壳内存在反射波前的情况下,可以获得良好的定位性能(即使在3D坐标方面)。通过将借助阵列测量的相位信息与基于图像方法的声音传播模型进行匹配,可以生成具有已知反射面的房间的声学图。此处提出的方法多路径全局相干场(MP-GCF)可以解释为GCF的概括。有了MP-GCF,就不再需要直接波前在反射中占主导地位的假设。对在混响室中获取的真实数据进行的实验表明,使用线阵列,所提出的方法在很大程度上优于使用GCF获得的结果。还进行了模拟,以研究在不同环境条件下性能如何变化。

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