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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 ...
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.
An electret microphone is a microphone whose diaphragm forms a capacitor (historically-termed a condenser) that incorporates an electret. The electret's permanent electric dipole provides a constant charge Q on the capacitor. Sound waves move the diaphragm, changing the capacitance C, which produces a corresponding voltage change across the ...
Acoustic Kitty. Acoustic Kitty was a Central Intelligence Agency (CIA) project launched by their Directorate of Science & Technology in the 1960s, which intended to use cats to spy on the Kremlin and Soviet embassies. [1]
Microphone. Shure Brothers microphone, model 55S, multi-impedance "Small Unidyne" dynamic from 1951. A microphone, colloquially called a mic ( / maɪk / ), [1] or mike, [a] is a transducer that converts sound into an electrical signal.
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 ...
A microphone array is any number of microphones operating in tandem. There are many applications: Locating objects by sound: acoustic source localization, e.g., military use to locate the source (s) of artillery fire. Aircraft location and tracking. Typically, an array is made up of omnidirectional microphones, directional microphones, or a mix ...
Spy camera A mini-camera imprinted with 007. [11] Gondola hovercraft A gondola equipped with a propeller engine; it can also convert into a hovercraft. [61] Poison pen Holly Goodhead's pen that contains a needle to inject someone with poison. [62] Notebook dart Goodhead's notebook that shoots a poison dart. Bond calls it a "fairly deadly diary ...
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