An Inverse Microphone Array Method for the Estimation of a Rotating Source Directivity
An Inverse Microphone Array Method for the Estimation of a Rotating Source Directivity
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DOI：
10.3390/acoustics3030030
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发表时间：
2021-06
期刊：
影响因子：
2.1
通讯作者：
Simon Jekosch;E. Sarradj
中科院分区：
文献类型：
--
作者：
Simon Jekosch;E. Sarradj
麦克风阵列方法对于确定旋转声源的位置和大小是有用的。本文提出了一种利用反向传声器阵列方法计算旋转声源的离散指向性图的方法。所提出的方法分为三个连续的步骤。首先，采用虚拟旋转阵列方法补偿源的运动，以计算互谱矩阵。其次，通过协方差矩阵拟合方法确定源位置。最后，声源指向性的计算使用的逆方法SODIX上减少焦点网格。实验验证和模拟合成数据用于验证的方法。为此，设计了一种具有可控转向方向图的旋转参量扬声器阵列。比较了五种不同的旋转源指向性图。所提出的方法补偿源运动，并能够重建的位置以及旋转波束源的方向性图案。
Microphone arrays methods are useful for determining the location and magnitude of rotating acoustic sources. This work presents an approach to calculating a discrete directivity pattern of a rotating sound source using inverse microphone array methods. The proposed method is divided into three consecutive steps. Firstly, a virtual rotating array method that compensates for motion of the source is employed in order to calculate the cross-spectral matrix. Secondly, the source locations are determined by a covariance matrix fitting approach. Finally, the sound source directivity is calculated using the inverse method SODIX on a reduced focus grid. Experimental validation and synthetic data from a simulation are used for the verification of the method. For this purpose, a rotating parametric loudspeaker array with a controllable steering pattern is designed. Five different directivity patterns of the rotating source are compared. The proposed method compensates for source motion and is able to reconstruct the location as well the directivity pattern of the rotating beam source.