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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.
On 25 August 2009, U.S. patent 7,580,533 was issued for a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air ("Particulate Flow Detection Microphone based on a laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path"). Sound pressure waves cause disturbances in the smoke that in ...
A parabolic microphone is a microphone that uses a parabolic reflector to collect and focus sound waves onto a transducer, in much the same way that a parabolic antenna (e.g. satellite dish) does with radio waves. Though they lack high fidelity, parabolic microphones have great sensitivity to sounds coming from one direction, along the axis of ...
The cavity was a high-Q round silver-plated copper "can", with the internal diameter of 31 ⁄ 40 in (19.7 mm) and about 11 ⁄ 16 in (17.5 mm) long, with inductance of about 10 nanohenries. [5] Its front side was closed with a very thin (3 thou , or 75 micrometers) and fragile conductive membrane.
A long-range surveillance team from the 82nd Airborne Division in Afghanistan during 2007. Long-range surveillance (LRS) teams (pronounced "lurse") were elite, specially-trained surveillance units of the United States Army employed for clandestine operation by Military Intelligence for gathering direct human intelligence information deep within enemy territory.
The original system was capable of oceanic surveillance with the long ranges made possible by exploiting the deep sound channel, or SOFAR channel. An indication of ranges is the first detection, recognition and reporting of a Soviet nuclear submarine coming into the Atlantic through the Greenland-Iceland-United Kingdom (GIUK) gap by an array ...
Big sister literally checked to make sure mom was really gone then checked out the camera before she started working on freeing the pup! This cracked me up!
Long-Range Reconnaissance and Observation System or LORROS is a sensor system developed by Elbit Systems to provide long-range daytime and night-time surveillance. The unit consists of Forward looking infrared (FLIR) and Charge-coupled device (CCD) image sensors. Optional components include eyesafe laser rangefinder, built-in compass and ...
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