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  2. Undetectable Firearms Act - Wikipedia

    en.wikipedia.org/wiki/Undetectable_Firearms_Act

    The United States Undetectable Firearms Act of 1988 (18 U.S.C. § 922(p)) makes it illegal to manufacture, import, sell, ship, deliver, possess, transfer, or receive any firearm that is not as detectable by walk-through metal detection as a security exemplar containing 3.7 oz (105 g) of steel, or any firearm with major components that do not generate an accurate image before standard airport ...

  3. Gunfire locator - Wikipedia

    en.wikipedia.org/wiki/Gunfire_locator

    Shooting Detector Diagram. A gunfire locator or gunshot detection system is a system that detects and conveys the location of gunfire or other weapon fire using acoustic, vibration, optical, or potentially other types of sensors, as well as a combination of such sensors. These systems are used by law enforcement, security, military, government ...

  4. Metal detector - Wikipedia

    en.wikipedia.org/wiki/Metal_detector

    A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft, and a variable-shaped pickup coil. When the coil nears metal, the control box signals its presence with a ...

  5. Letters: If concealed guns are OK why have metal detectors at ...

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  6. Boomerang (countermeasure) - Wikipedia

    en.wikipedia.org/wiki/Boomerang_(countermeasure)

    Boomerang (countermeasure) "Boomerang 3" being used by British forces in Afghanistan. Boomerang is a gunfire locator developed by DARPA and BBN Technologies primarily for use against snipers. Boomerang is mounted on mobile vehicles such as the Humvee, Stryker, and MRAP combat vehicles. There were plans to integrate it into the Land Warrior system.

  7. Radar in World War II - Wikipedia

    en.wikipedia.org/wiki/Radar_in_World_War_II

    Radar in World War II greatly influenced many important aspects of the conflict. [1] This revolutionary new technology of radio-based detection and tracking was used by both the Allies and Axis powers in World War II, which had evolved independently in a number of nations during the mid 1930s. [2] At the outbreak of war in September 1939, both ...

  8. ShotSpotter - Wikipedia

    en.wikipedia.org/wiki/ShotSpotter

    ShotSpotter. SoundThinking, Inc. (formerly ShotSpotter Inc.) is an American security technology company based in Fremont, California. The company is publicly traded, and is known for its gunfire locator service. [2][3] ShotSpotter claims it can identify whether or not a gunshot was fired in an area in order to dispatch law enforcement, though ...

  9. Millimeter wave scanner - Wikipedia

    en.wikipedia.org/wiki/Millimeter_wave_scanner

    A millimeter wave scanner is a whole-body imaging device used for detecting objects concealed underneath a person’s clothing using a form of electromagnetic radiation. Typical uses for this technology include detection of items for commercial loss prevention, smuggling, and screening for weapons at government buildings and airport security ...