For the need of modern intense acoustics technology research, the performance parameters of a hydrodynamic intense sound generator are investigated experimentally. The rules of the influences of the operating pressure, the distance between the reed and nozzle, and the angle of the reed on the SPL(sound pressure level) in the acoustic radiation field are explored and obtained. The results show that, under the optimal circumstance, the SPL in the outlet of the generator can be larger than 140dB.