Abstract: Accurate identification of noise sources is the key to noise control of electromechanical products. Near-field acoustic holography and beamforming are two commonly used acoustic source visualization methods, which are respectively applicable to the reconstruction of near-field low-frequency acoustic source and far-field high-frequency acoustic source. The traditional near-field acoustic holography and beamforming are based on the assumption of free field, that is, they are suitable in the case where the ratio of target sound to interference noise is greater than 10 dB. However, noise testing for many electromechanical products can only be carried out in the workshop where the free field condition is not satisfied. In this paper, the development history of visual reconstruction methods of sound source in strong interference environments is reviewed from the aspects of acoustic propagation and signal processing, and the characteristics and application scope of each method are evaluated. Particularly, the techniques of near-field acoustic holography in strong interference environments, including the sound field separation technique and inverse patch transfer function method, are highlighted. In addition, the sound source reconstruction method in reverberation environment and the signal and noise separation method based on signal processing are introduced. Finally, the problems to be solved and the development trend of sound source reconstruction in strong interference environments are discussed.