Generation of multiple sound zones by spatial filtering in wavenumber domain using a linear array of loudspeakers
Generation of multiple sound zones by spatial filtering in wavenumber domain using a linear array of loudspeakers
复制标题
使用扬声器线性阵列在波数域中通过空间滤波生成多个声音区域
DOI：
10.1109/icassp.2014.6854500
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Okamoto
中科院分区：
文献类型：
--
作者：
T. Okamoto
提出了一种新颖的信号处理方法，用于使用扬声器的线性阵列在任意水平位置产生声学上的亮区和暗区。大多数传统的方法都是基于控制点和扬声器位置之间的空间相关矩阵的逆的数值计算。然而，这种方法很不稳定，因为声学反问题是非常病态的。另一方面，在所提出的方法中，通过引入谱划分方法并将控制线上的声压建模为对应于亮区和暗区的矩形窗口来解析地推导出波数域的空间滤波器。计算机仿真结果表明，与传统的声能差最大化方法相比，该方法能更准确地生成声学明暗区域。
Novel signal processing is proposed for generating acoustically bright and dark zones at arbitrary horizontal positions using a linear array of loudspeakers. Most conventional methods are based on the numerical calculation of the inverse of the spatial correlation matrix between control points and the positions of the loudspeakers. However, such methods are quite unstable because the acoustic inverse problem is very ill-conditioned. On the other hand, in the proposed method, spatial filters in the wavenumber domain are analytically derived by introducing the spectral division method and modeling sound pressures at the control line as a rectangular window corresponding to bright and dark zones. Computer simulation results show that the proposed method can generate acoustically bright and dark zones more accurately than the conventional acoustic energy difference maximization method.
DOI：
--
发表时间：
2018
期刊：
影响因子：
--
作者：
Akira Omoto;Hiroshi Kashiwazaki
通讯作者：
Hiroshi Kashiwazaki