1前言在演播厅整个扩声系统时,使用无线传声器拾音,调音台的输出有干扰声,影响扩声效果。经过分析,出现干扰的缘由是因为无线接收机使用的电源与调音台使用的电源不共地,存在一定的电势差,这样市电的干扰信号即可通过无线接收机至调音台,再从调音台电源保护地传输至市电的保护地,为干扰信号的传 1 Introduction In the studio when the entire sound reinforcement system, the use of wireless microphone pickup, mixer output interference noise, affecting the sound reinforcement effect. After analysis, the reason for the interference is because the power used by the wireless receiver is not shared with the power used by the mixer, and there is a certain potential difference, so that the interference signal of the commercial power can pass through the wireless receiver to the mixer, Condenser power protection to the mains protection ground, to interfere with the signal transmission