带支撑物圆阵波达方向估计实验研究

为了验证带支撑物圆阵波达方向估计算法的有效性,在介绍算法原理的基础上,利用设计的镶嵌在刚性球上的12元均匀圆阵,分别在消声室和外场进行了声源定向实验研究.定向结果显示消声室内平均估计误差不大于2°,均方根误差不大于2.2°,外场平均估计误差和均方根误差均不大于3°.实验表明基于带支撑物圆阵所推导的波达方向估计算法是有效的,能正确估计出声源的波达方向,且具有较高的精度,为利用带支撑物圆阵进行波达方向估计的工程应用奠定了基础.

Experimental study on direction of arrive estimation for circular array with baffles

In order to verify the validity of direction of arrive （DOA） estimation algorithms for circular array with baffles,the basic theory of which is introduced and sound sources localization experiments are conducted in anechoic chamber and outdoor environment respectively based on a designed array model of a uniform circular array （UCA） with 12 elements mounted on a rigid sphere.The localization results indicate that the average estimation error is less 2° and the root mean square error （RMSE） is less 2.2° in anechoic chamber,while the error in outdoor environment is less 3°.The experiment results demonstrate that the DOA estimation algorithms for circular arrays with baffles are valid and can estimate the DOA of sound sources with high precision,which provides basis for engineering application of DOA estimation using array with baffles.