有源噪声控制分为两类:全局控制和局部控制。全局控制的目标是降低所有点的噪声,而局部控制只关注局部的降噪效果~([1])。全局控制又包括自由场控制和封闭场控制。封闭场控制,如汽车车厢内低频噪声控制、飞机螺旋桨噪声控制等,其控制目标是降低封闭空间内总的声能量,这可能会导致原来噪声较小的点能量增加,但是总体上能降低封闭空间内的噪声,因为控制了最主要的声模态~([1])。为实现全局有效控制,初级声源和次级声源的距离应小于噪声波长的 Active noise control is divided into two categories: global control and local control. The goal of global control is to reduce the noise at all points, while the local control only focuses on the local noise reduction effect ~ ([1]). Global control also includes free field control and closed field control. Closed-field control, such as low-frequency noise control in vehicle compartments, aircraft propeller noise control, etc., has the goal of reducing the total acoustic energy in the confined space, which may result in an increase of energy at a point where the noise is less, but in general, The noise in space, because of the control of the most important mode of sound ~ ([1]). In order to achieve global effective control, the distance between the primary sound source and the secondary sound source should be less than the noise wavelength