摘要
在目标房间外一定距离,利用一束激光照射目标房间玻璃,反射回来的激光束被由于声压引起的玻璃振动信号调制。利用光电传感器接收反射回来的激光束并将其转化为电信号。利用电路对获取的信号进行滤波、放大处理,同时使用音频处理软件Adobe Audition滤波配合硬件滤波再次优化还原信号,从而实现对目标的监听。
In a certain distance away from the target room, with the laser beam irradiate the glass of the target room. The reflected back laser beam will be modulated by vibration signal of the glass which caused by sound pressure. The information of the sound is obtained through the signal processing by hardware filter, and cooperated with Adobe Audition software filter to optimize the signal again meanwhile. Based on those, laser eavesdropping to sound source can be realized.
出处
《电子设计工程》
2015年第19期8-10,共3页
Electronic Design Engineering
基金
2013年度大学生创新创业训练计划(2013030)
关键词
激光
监听
声波
振动
软件滤波
laser
monitor
sound wave
vibration
software filtering
