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2. Covert listening device - Wikipedia

   en.wikipedia.org/wiki/Covert_listening_device

   The recording device was concealed on a person Thatcher had previously approached for help in the crime. [citation needed] Electronic bugging devices were found in March 2003 at offices used by French and German delegations at the European Union headquarters in Brussels. Devices were also discovered at offices used by other delegations.

3. The Thing (listening device) - Wikipedia

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

   The device, a passive cavity resonator, became active only when a radio signal of the correct frequency was sent to the device from an external transmitter. This is referred to in NSA parlance as "illuminating" a passive device. Sound waves (from voices inside the ambassador's office) passed through the thin wood case, striking the membrane and ...

4. Stenomask - Wikipedia

   en.wikipedia.org/wiki/Stenomask

   Court reporter tests his stenomask. [1]A stenomask is a hand-held microphone built into a padded, soundproof enclosure that fits over the speaker's mouth or nose and mouth. . Some lightweight versions may be fitted with an elastic neck strap to hold them in place while freeing the user's hands for other tas

5. Audio forensics - Wikipedia

   en.wikipedia.org/wiki/Audio_forensics

   The possibility of performing forensic audio analysis depends on the availability of audio recordings made outside the boundaries of a recording studio. The first portable magnetic tape recorders appeared in the 1950s and soon these devices were used to obtain clandestine recordings of interviews and wiretaps, as well as to record interrogations.

6. Hidden camera - Wikipedia

   en.wikipedia.org/wiki/Hidden_camera

   A hidden camera can be wired or wireless.Hidden cameras connected, by cable or wirelessly, to a viewing or recording device, such as a television, computer, videocassette recorder, network video recorder, digital video recorder, memory card, or another data storage medium.

7. Talkboy - Wikipedia

   en.wikipedia.org/wiki/Talkboy

   Talkboy is a line of handheld voice recorder and sound novelty toys manufactured by Tiger Electronics in the 1990s. [1] The brand began as a result of a promotional tie-in with the 1992 film Home Alone 2: Lost in New York; the most well-known product was the Deluxe Talkboy, a cassette recorder and player with a variable-speed voice changer that caused toy crazes over several holiday shopping ...