便携式激光远程语音监听装置设计  

Laser Remote Voice Detection System

作　　者：黄贞[1] 吴林富[1] 

机构地区：[1]湛江师范学院物理科学与技术学院,广东湛江524048

出　　处：《激光与光电子学进展》2012年第12期98-101,共4页Laser & Optoelectronics Progress

基　　金：广东省湛江师范学院校级科研基金(L1106)资助课题

摘　　要：将半导体激光器输出光照射到带有振源信息的受迫振动玻璃表面,经玻璃表面反射的光携带有振源的信息。反射光由光电二极管采集并转换为电信号,再经功放放大后,直接送喇叭输出,达到了将振源声音还原的目的,实现了对远程语音的监听。同时还设计了基于声卡采集和LabVIEW软件的信号分析系统并进行了测试。测试结果表明,本装置可以较好的对模拟房间内的语音信号进行远程监听,最远监听距离可达50.7m,具有灵敏度高、操作简单、制作成本低廉等优点。A remote voice detection system is designed. Laser output light is focused on the surface of the forced vibrated glass nearby the sound source, and the reflected light, carrying the information of the sound source, is converted to electrical signals by the photodiode. The signal is amplified and sent directly to a speaker to obtain the remote voice detection. A computer sound card which is the essential part of the apparatus because it processes signals from the photodiode is designed, Signals analysis system is also designed based on LabVIEW software. Testing results show that the system can detect the voice signal from an analog room in a distance of 50.7 m with high sensitivity. This design is simple operation, low manufacture cost.

关 键 词：测量 远程语音监听 LABVIEW 声卡 

分 类 号：O439[机械工程—光学工程]