在广播宣传和会议扩音中常使用二个或更多个传声器如话筒、唱机等,因它们不匹配,相互干扰,影响使用效果。我们用可调电位器与电介电容器组成简易调谐器(如图示线路接法),取得良好效果。 Two or more microphones, such as microphones and record players, are often used in public announcements and conference announcements. As they do not match, they interfere with each other and affect their performance. We use adjustable potentiometers and dielectric capacitors to form a simple tuner (as shown in the line connection), and achieved good results.