一组窃听演示实验  

A Group of Eavesdropping Demonstration Experiments

作　　者：梁生辉[1] 林科业[1] 刘诗伟[1] 

机构地区：[1]华南师范大学

出　　处：《电子技术（上海）》2011年第10期30-31,25,共3页Electronic Technology

摘　　要：文章提出一组窃听演示实验。该组演示实验分别以微波和超声波作为载波,发射到声源处被声音信号调制后反射回来,反射回来的调幅波被接收解调后,再通过音频信号放大处理电路,由扬声器还原出原来的声音信号。实验结果表明,该实验方法简便、易行,便于操作,能够满足一般实验演示的要求。This article presents a group of eavesdropping demonstration experiments. The group of experiments uses microwave and ultrasound as the carrier waves, separately, they are transmitted to sound source and reflected after modulated by audio signal. After the amplitude modulated wave which reflected from the sound source is received and demodulated, it is processed by the voice signal amplification circuit, the original audio signal then be reproduced by the loudspeaker. The experiment results show that this experiment method is simPle, convenient, and easy to operate, be able to meet the requirements of common experiments.

关 键 词：微波 超声波 声音信号 窃听 演示实验 

分 类 号：TN912.3[电子电信—通信与信息系统]