Spectra M - Laser microphone for discreet eavesdropping
MIT can now eavesdrop through soundproof glass by watching the vibrations of a bag of chips - ExtremeTech
First Anti-Spy Glass on the Market Soon | glassonweb.com
Modal response-based technical countersurveillance measure against laser microphones | Extrica - Publisher of International Research Journals
Laser Microphones: The Soviet Spy Technology that's Making a Comeback
Roll Your Own Parabolic Microphone | Hackaday
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