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  2. FireFly Acoustic Threat Detection System - Wikipedia

    en.wikipedia.org/wiki/FireFly_Acoustic_Threat...

    The FireFly Acoustic Threat Detection System is a system for detecting hostile fire. It has been developed jointly by the US Army Aviation and Missile Research Development and Engineering Command (AMRDEC), the U.S. Army Research Laboratory (ARL) and industry partners. The FireFly acoustic and electro-optical (EO) sensor can operate with ...

  3. Emergency light - Wikipedia

    en.wikipedia.org/wiki/Emergency_light

    Some emergency lighting manufacturers offer dimming solutions for common area emergency lighting to allow energy savings for building owners when unoccupied using embedded sensors. [4] Another popular method for lighting designers, architects and contractors are battery backup ballasts that install within or adjacent to existing lighting fixtures.

  4. Exit sign - Wikipedia

    en.wikipedia.org/wiki/Exit_sign

    In the event of a power outage, the battery would supply power to light the sign. Early battery-backup systems were big, heavy, and costly. [4] Modern systems are lightweight, can be installed virtually anywhere, and are integrated into the fixture, rather than requiring a separate box.

  5. Fire escape - Wikipedia

    en.wikipedia.org/wiki/Fire_escape

    Exit from the interior of a building to the fire escape may be provided by a fire exit door, but in most cases the only exit is through a window. When there is a door, it is often fitted with a fire alarm to prevent other uses of the fire escape, and to prevent unauthorized entry. As many fire escapes were built before the advent of electronic ...

  6. Emergency exit - Wikipedia

    en.wikipedia.org/wiki/Emergency_exit

    Emergency exit in Universitetet metro station in Stockholm. An emergency exit in a building or other structure is a special exit used during emergencies such as fires.The combined use of regular and emergency exits allows for faster evacuation, and emergency exits provide alternative means of evacuation if regular exits are inaccessible.

  7. Emergency power system - Wikipedia

    en.wikipedia.org/wiki/Emergency_power_system

    A backup generator for a large apartment building A backup power fuel cell for telecom applications A portable emergency power generator in a shipping container. An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply.

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