Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark, Orsteds Plads 352, 2800 Kongens Lyngby, Denmark. etr@elektro. dtu.dk
J Acoust Soc Am. 2011 Sep;130(3):1095-8. doi: 10.1121/1.3621294.
Beamforming with uniform circular microphone arrays can be used for localizing sound sources over 360°. Typically, the array microphones are suspended in free space or they are mounted on a solid cylinder. However, the cylinder is often considered to be infinitely long because the scattering problem has no exact solution for a finite cylinder. Alternatively one can use a solid sphere. This investigation compares the performance of a circular array mounded on a rigid sphere with that of such an array in free space and mounted on an infinite cylinder, using computer simulations. The examined techniques are delay-and-sum and circular harmonics beamforming, and the results are validated experimentally.
采用均匀圆形麦克风阵列的波束形成可用于定位 360° 以上的声源。通常，阵列麦克风悬浮在自由空间中，或者安装在固体圆柱上。然而，由于有限圆柱的散射问题没有精确解，因此通常认为圆柱是无限长的。或者可以使用实心球体。本研究通过计算机模拟比较了刚性球体上安装的圆形阵列与自由空间中安装的此类阵列以及安装在无限圆柱上的圆形阵列的性能。所研究的技术是延迟和求和以及圆形谐波波束形成，并且实验验证了结果。
