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2. 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.

3. Radiofrequency MASINT - Wikipedia

   en.wikipedia.org/wiki/Radiofrequency_MASINT

   Covert modulators for audio surveillance [ edit ] Another category, to which the US code name TEAPOT may apply, is the detection not simply of RF, but of an unintended audio modulation of an external RF signal flooding the area being surveilled.

4. Countersurveillance - Wikipedia

   en.wikipedia.org/wiki/Countersurveillance

   Countersurveillance refers to measures that are usually undertaken by the public to prevent surveillance, [1] including covert surveillance.Countersurveillance may include electronic methods such as technical surveillance counter-measures, which is the process of detecting surveillance devices.

5. U.S. Post Office to brief lawmakers on its covert ... - AOL

   www.aol.com/news/post-office-to-brief-lawmakers...

   The head of the post office law enforcement division running a covert social media collection program is expected to brief lawmakers on the House Oversight Committee Wednesday morning about its ...

6. Judge grills Mass. state troopers over illegal, undisclosed ...

   www.aol.com/judge-grills-mass-state-troopers...

   Documents obtained by the T&G show Mawn, June 29, 2023, promulgated a policy governing the use of covert audio recordings in the department. The policy states troopers will be, among other things ...

7. 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.