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2. The Thing (listening device) - Wikipedia

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

   The Thing, also known as the Great Seal bug, was one of the first covert listening devices (or "bugs") to use passive techniques to transmit an audio signal. It was concealed inside a gift given by the Soviet Union to W. Averell Harriman, the United States Ambassador to the Soviet Union, on August 4, 1945.

3. Covert listening device - Wikipedia

   en.wikipedia.org/wiki/Covert_listening_device

   A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations. Self-contained electronic covert listening devices came into common use with ...

4. Laser microphone - Wikipedia

   en.wikipedia.org/wiki/Laser_microphone

   Laser microphone. A laser microphone is a surveillance device that uses a laser beam to detect sound vibrations in a distant object. It can be used to eavesdrop with minimal chance of exposure. The object is typically inside a room where a conversation is taking place and can be anything that can vibrate (for example, a picture on a wall) in ...

5. Walmart patents surveillance tool that can eavesdrop on workers

   www.engadget.com/2018-07-12-walmart-patent-audio...

   The audio surveillance system Walmart designed is composed of several sensors that can collect all kinds of audio data, including beeps and the rustling of paper bags. Any data it gathers can be ...

6. Here are the devices law enforcement use to spy on you - Engadget

   www.engadget.com/2015-12-17-spy-hardware-catalog...

   Updated Thu, Dec 17, 2015 · 2 min read. The Intercept obtained the catalog of devices used by federal and local law enforcement to collect and monitor cell phone data. The tracking hardware ...

7. The Conversation - Wikipedia

   en.wikipedia.org/wiki/The_Conversation

   The Conversation is a 1974 American neo-noir [ 2] mystery thriller film written, produced, and directed by Francis Ford Coppola and starring Gene Hackman, John Cazale, Allen Garfield, Cindy Williams, Frederic Forrest, Harrison Ford, Teri Garr, and Robert Duvall. Hackman portrays a surveillance expert who faces a moral dilemma when his ...