Chen J, Van Veen B D, Hecox K E
Department of Electrical and Computer Engineering, University of Wisconsin-Madison 53706.
J Acoust Soc Am. 1992 Oct;92(4 Pt 1):1933-44. doi: 10.1121/1.405241.
In this article, a beamformer is proposed as a functional model for the spatial and temporal filtering characteristics of the external ear. The output of a beamformer is a weighted combination of the data received at an array of spatially distributed sensors. The beamformer weights and array geometry determine its spatial and temporal filtering characteristics. A procedure is described for choosing the weights to minimize the mean-squared error between the beamformer response and the measured response of the external ear. The effectiveness of the model is demonstrated by designing a beamformer of several hundred weights that duplicates and interpolates the measured external ear response of a cat over broad ranges of frequency and direction. A limited investigation of modeling performance as a function of array geometry is reported.
在本文中，提出了一种波束形成器作为外耳空间和时间滤波特性的功能模型。波束形成器的输出是在空间分布的传感器阵列处接收到的数据的加权组合。波束形成器的权重和阵列几何形状决定了其空间和时间滤波特性。描述了一种选择权重的过程，以使波束形成器响应与外耳测量响应之间的均方误差最小化。通过设计一个具有数百个权重的波束形成器来证明该模型的有效性，该波束形成器在很宽的频率和方向范围内复制并内插了猫的外耳测量响应。报告了对阵列几何形状函数的建模性能的有限研究。
