基于高阶谱的声压梯度声源定向

DETERMINATION OF BEARINGS OF SOUND SOURCE WITH SOUND PRESSURE GRADIENT BASED ON HIGHER ORDER SPECTRA

声压梯度法用于声源的定向是一种新方法。该法对声源定向既存在系统误差 (确定性误差 ) ,又存在随机误差。本文研究了在高斯随机干扰噪声下 ,非高斯信号声源的基于高阶谱的随机误差消除方法 ,应用高阶谱对高斯噪声的不敏感性 ,由此可以消除高斯噪声的影响。

Determination of the bearings of sound source with the sound pressure gradient is a new method put forward by the authors. The method has system errors (determinate errors) and random errors. A method based on higher order spectra is proposed to reduce the random error when the interfering noise is Gaussian while the source signal is non-Gaussian. As a result of the non-sensitivity of higher order spectra to the Gaussian noise, the detrimental effects of interfering noise can be suppressed. Simulation results show the effectiveness of the new method.