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  2. The best hidden camera detectors to give you peace of ... - AOL

    www.aol.com/best-hidden-camera-detectors-peace...

    You've pored over dozens of vacation rentals to find the perfect one for your next getaway. You've spent a ton of time planning the trip to a T and you’re super excited to finally enjoy your stay.

  3. Hidden camera - Wikipedia

    en.wikipedia.org/wiki/Hidden_camera

    Hidden cameras are often considered a surveillance tool. The term "hidden camera" is commonly used when subjects are unaware that they are being recorded, usually lacking their knowledge and consent; the term "spy camera" is generally used when the subject would object to being recorded if they were aware of the camera's presence.

  4. The Thing (listening device) - Wikipedia

    en.wikipedia.org/wiki/The_Thing_(listening_device)

    An American State Department employee was then able to reproduce the results using an untuned wideband receiver with a simple diode detector/demodulator, [9] similar to some field strength meters. Two additional State Department employees, John W. Ford and Joseph Bezjian, were sent to Moscow in March 1951 to investigate this and other suspected ...

  5. Full body scanner - Wikipedia

    en.wikipedia.org/wiki/Full_body_scanner

    Full body scanner in millimeter wave scanners technique at Cologne Bonn Airport Image from an active millimeter wave body scanner. A full-body scanner is a device that detects objects on or inside a person's body for security screening purposes, without physically removing clothes or making physical contact.

  6. Secret photography - Wikipedia

    en.wikipedia.org/wiki/Secret_photography

    Erich Salomon took images of European summit meetings and a session of the US Supreme Court in secret using an Ermanox camera hidden in his hat. Some classic early U.S. street photography – such as that of Paul Strand on the Lower East Side [2] – was obtained by fixing a second "dummy lens" to the camera, whereas the real shot was taken ...

  7. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    The highly sophisticated devices were planted by the Soviets between 1976 and 1984 and were hidden inside a metal support bar. Information was intercepted by detecting the movements of metal bars inside the typewriter (the so-called latch interposers) by means of magnetometers. The data was then compressed and transmitted in bursts. [23]