一 引言 近十年来,有源消声技术发展迅速,尤其在对管道噪声控制方面,已进入实用阶段。但是,要将有源消声技木作为一种较为通用的噪声控制手段,还有许多困难。首先,对于全空间或局部空间有源消声,次级声源基阵(简称次级阵)阵元数目增多,使得消声系统中电子控制装置大大复杂起来,同时,电路还将引入信号幅度相位失真,这就限制了降噪量的提高 I. INTRODUCTION In the recent decade, active noise reduction technology has developed rapidly, especially in the control of pipeline noise and has entered into practical phase. However, there are many difficulties in using active muffler as a more general noise control method. First of all, for the whole space or local space active muffler, the secondary sound source array (referred to as the secondary array) the number of elements increased, making the anechoic system electronic control device greatly complicated at the same time, the circuit will also introduce the signal amplitude Phase distortion, which limits the amount of noise reduction