本文针对一个自适应有源消声控制系统以及一个以点声源为次级源的声系统，就如何实现空间最佳消声效果问题进行了讨论，给出了误差传声器的个数及空间位置与空间消声效果之间的关系，提出误差传声器应放置在实现消声后声压的极小方向上。所得结论在实验中得到了证实。 In this paper, an adaptive active silencer control system and a point source as the secondary source of the sound system, how to achieve the best spatial silencer effect were discussed, given the number of error microphones and spatial location And the relationship between space muffler effect, the proposed microphone should be placed in the microphone after the realization of sound pressure in the smallest direction. The conclusions obtained in the experiment have been confirmed.