相位共轭方法可实现声波的反向传播和自适应聚焦，可用于声源定位。本文基于有限阵元平面阵列和球面阵列使用数值方法对相位共轭方法的定位分辨率进行了研究，研究了相位共轭阵列的形式及阵列与声源间距和声源定位分辨率的关系，还研究了在声源处设置声汇对噪声源定位分辨率的影响。数值结果表明：只有在近场测量声压梯度并使用偶极子源的相位共轭才能突破声波衍射极限分辨率；平面阵列距离点声源的距离越远分辨率越低，闭合球面阵列的分辨率不随阵列距离点声源距离的改变而改变；使用声汇后基于非近场测量也能突破声波衍射极限分辨率。



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Phase conjugation (PC) arrays could be used to build the image of a noise source. The discrete plane and spherical surface arrays are used to study the spatial resolution of acoustic phase conjugation. The spatial resolutions of various PC arrays with different distances between array and source are studied numerically. The effect of an acoustic sink on the spatial resolution is discussed. The numerical simulation shows that only the dipole array at near field produces a focal volume much smaller than half a wavelength. The field magnitude and the resolution generated by the plane arrays decrease with increasing distance between the source and the array. The field magnitude and the resolution generated by the closed spherical surface arrays do not change with the radius of the arrays. The arrays with an acoustic sink produce a subwavelength focusing wave even not at the near field