Abstract: Hydrodynamic infrasound projectors have great advantage in generating low frequency acoustic waves over other acoustic transducers. An electromechanical analogy model is proposed to simulate the performance of the hydrodynamic infrasound projector. And, a test bench of the hydrodynamic infrasound projector is designed and fabricated. The simulation results of electromechanical analog model are compared with the experimental results in air. The results show that the error between the predicted and measured sound source levels of the electromechanical analogy model at 1-4 Hz is less than 10%, which proves the validity and reliability of the electromechanical analogy model.