一些电子电路中常用到的蜂鸣器,它具有体积小、重量轻、输入阻抗高、耗电少等优点,但它音量小(加大电压或加装三极管放大效果均不理想),在蜂鸣器上加助音腔可提高音量。由于蝉鸣器助音腔体较难购买,笔者发现一种简易方法制作助音腔。其方法如下: Some buzzer commonly used in electronic circuits, it has the advantages of small size, light weight, high input impedance, low power consumption, but it is small (increase the voltage or increase the transistor amplification are not ideal), the bee Aid cavity can increase the volume. As the cicadas sound cavity more difficult to buy, I found a simple method of making aids cavity. The method is as follows: