二次音频静噪装置李朝友随着我国无线电通信事业的发展，社会上拥有无线电通信机的用户不断增加，经常发生互干扰现象，使一些无线电通信机无法静噪守候。该装置能使无线电通信机在原静噪的基础上，实现二次音频静噪，而且增加了音频呼叫功能。工作原理图中ＢＬ是原通信机... Secondary Audio Squelch Device Li Chaoyu With the development of China’s radio communications, the number of users who own radiotelephones in the society is constantly increasing, and mutual interference often occurs, making some radiotelephones unable to wait quietly. The device enables the radiotelephone to achieve secondary audio muting based on the original squelch and adds audio calling capabilities. BL is the original working principle of the communication machine ...