有源噪声控制, 次级声源, 电力声类比线路, 滤波-X LMS算法

A method of secondary source modeling based on analogue circuits of electrical, mechanical and acoustical systems was provided in order to reduce the mismatch of transfer function estimation of secondary path in simulation of an active noise control system. The convergence range and noise reduction performance of the system using Filtered-X LMS algorithm were investigated. The results show that such a secondary source model has different amplitudes and phases from the ideal model, which makes the noise reduction performance of control system be much worse than the one with ideal model. Meantime, the convergence range of the control system is increased at low frequencies while decreased at high frequencies. The proposed model can provide a new method of secondary source modeling for further research on the simulation of active noise control systems.