Active Noise Control of Power Equipments Based on Generalized Finite Impulse Response Filter

In allusion to the problem of power equipment noise,the design method for active noise control is discussed,and based on the optimization of generalized finite impulse response(FIR) filter an active noise feed-forward cancellation algorithm is proposed and a layout scheme of sensors for signal detection is given,meanwhile the effect of noise cancellation is evaluated by error sensors.The noise from two sets of power equipments is collected as primary sound source,and the simulation of active noise control(ANC) is performed.Simulation results show that the low-frequency noise components with frequencies of 50 Hz,100 Hz and 200 Hz are reduced within the range from 12 dB to 18 dB,thus it can be seen that it is an effective approach to implement the control of low-frequency noise from power equipment by ANC technology.