Abstract: Infrasound noise reduction system is important in the measurement of infrasound.The electroacoustic model of the rosette pipe filter has been constructed in order to analyze the rule of the influence of different structure parameter of infrasound noise reduction system on its performance.Further,the single air inlet transfer function and noise reduction performance of the system have been quantitatively studied based on the wind model and simulation data.The effect of the parameters on the system performance has been summarized.Finally,the noise reduction performance of rosette pipe filter in International Monitoring System (IMS) has been assessed.The results and simulations show:(1) the number of air inlets approximately take 96,the array diameter is about 18 m,the first and second pipe internal diameter take 10~20 mm,the first and second volume of the summation cavities take less than 1L,the system can get better noise reduction performance;(2) IMS rosette pipe filters noise reduction system with best parameter setting requirements;(3)the rosette pipe filters with best array parameters can greatly improve the SNR.The results can provide a performance evaluation for the existing infrasound noise reduction system.It can offer an effective reference for the design of a new infrasound noise reduction system.