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The Laser Microphone
http://web.mit.edu/6.101/www/s2017/projects/jalverio_Project_Final_Report.pdf#:~:text=The%20laser%20microphone%20is%20a%20very%20sensitive%20device,injected%20version%20of%20the%20audio%20signal%20of%20interest.
Real-time audio detection and regeneration of moving …
https://pubmed.ncbi.nlm.nih.gov/32121683/
Sound detection with optical means is an appealing research topic. In this manuscript, we proposed a laser microphone system allowing simultaneous detection and regeneration of the audio signal by observing the movement of secondary speckle patterns. In the proposed system, optical flow method, alon …
Long Range Audio and Audio-Visual Event Detection Using a ...
http://ccvcl.org/wp-content/uploads/2019/01/Wang-SPIE-2010.pdf
Keywords: LDV, Laser-Doppler Vibrometry, long-range, audio-visual, event detection, integration. 1. INTRODUCTION Event detection using both audio and video is receiving growing interests in surveillance applications. In general, most human activity detection systems depend mainly on visual information1,2,3, whereas the audio modality is used as
Spy Surveillance: Laser Listening Systems
http://www.electromax.com/laser.html
The interferometric technology applied here allows to detect and make audible even the smallest vibrations, e.g. during conversations, by means of an invisible laser beam almost independently of the detection angle and the material of the target. And it really doesn't matter which target material is used.
(PDF) Design and implementation of audio transceiver …
https://www.researchgate.net/publication/332687632_Design_and_implementation_of_audio_transceiver_using_infrared_laser_for_audio_signal_detection
vibration modulated laser signals was designed, the idea is to convert these vibrations through the device to a hearable sound with high quality. The transmitter is …
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