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The CIA ran a secret research program at the Dutch Radar Laboratory (NRP) in Noordwijk in the Netherlands from 1954 to approximately 1967 to create its own covert listening devices based on a dipole antenna with a detector diode and a small microphone amplifier. The devices were developed under the Easy Chair research contract [11] and were ...
PSAP amplifiers are usually small simple devices. They amplify sounds and deliver the result to the ear(s) of the user. The main components are a microphone, amplifier, speaker, volume controller and power source. The microphone captures the sound (pressure) waves and converts them to an electric signal.
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.
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]
A hearing test is the best way to find out about your hearing and which device will be most beneficial for your needs. __wf_reserved_inherit Trying to figure out which one suits your lifestyle ...
A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...