Abstract: Based on the method FW-H acoustic model, the acoustic characteristics of the Hartmann acoustic generator array are numerically calculated for different inlet pressures of 3.12, 4.12, 5.12, 6.12, 7.12 and 8.12 atm. The empirical equation of downstream acoustic intensity is introduced by nonlinear fitting of the calculated intensity results for different inlet pressures. The significance test is taken with F function, and the results show that the confidence level is at 10^-4, and the regression level is high. The believability of the empirical equation of acoustic intensity is high. The results of the paper are significant for the practical application of the Hartmann acoustic generator array.