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  2. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    Civil defense siren. TWS 295 Sirens, HSS Engineering siren Warning System. Federal Signal Thunderbolt 1003. There are 8,200 alarm sirens for civil protection throughout Switzerland. They are tested once a year on the first Wednesday in February. [1] Sound sample ⓘ. A civil defense siren is a siren used to provide an emergency population ...

  3. M84 stun grenade - Wikipedia

    en.wikipedia.org/wiki/M84_stun_grenade

    170–180 decibels and 6–8 million candelas within a 5-foot (1.5 m) radius. The M84 is the currently-issued stun grenade ("flashbang") of the United States Armed Forces and SWAT teams throughout the United States. Upon detonation, it emits an intensely loud "bang" of 170–180 decibels and a blinding flash of more than one million candelas ...

  4. Stun grenade - Wikipedia

    en.wikipedia.org/wiki/Stun_grenade

    Stun grenade. M84 stun grenade. A stun grenade, also known as a flash grenade, flashbang, thunderflash, or sound bomb, [1] is a non-lethal explosive device used to temporarily disorient an enemy's senses. Upon detonation, a stun grenade produces a blinding flash of light and an extremely loud "bang". They are often used in close-quarters combat ...

  5. Contact explosive - Wikipedia

    en.wikipedia.org/wiki/Contact_explosive

    Contact explosive. A contact explosive is a chemical substance that explodes violently when it is exposed to a relatively small amount of energy (e.g. friction, pressure, sound, light). Though different contact explosives have varying amounts of energy sensitivity, they are all much more sensitive relative to other kinds of explosives.

  6. Time bomb - Wikipedia

    en.wikipedia.org/wiki/Time_bomb

    A time bomb (or a timebomb, time-bomb) is a bomb whose detonation is triggered by a timer. The use or attempted use of time bombs has been for various purposes including insurance fraud, terrorism, assassination, sabotage and warfare. They are a frequent plot device in thriller and action films as they offer a way of imparting a dramatic sense ...

  7. Wanggongchang Explosion - Wikipedia

    en.wikipedia.org/wiki/Wanggongchang_Explosion

    The Wanggongchang Explosion (Chinese: 王恭廠大爆炸), also known as the Great Tianqi Explosion (天啟大爆炸), Wanggongchang Calamity (王恭廠之變) or Beijing Explosive Incident in the late Ming dynasty (晚明北京爆炸事件), was a catastrophic explosion that occurred on May 30, 1626, during the late reign of the Tianqi Emperor at the heavily populated Ming Chinese capital of ...

  8. Thomas William Gould - Wikipedia

    en.wikipedia.org/wiki/Thomas_William_Gould

    Every time the bomb was moved there was a loud twanging noise as of a broken spring which added nothing to their peace of mind. Thrasher was surfaced, stationary, and close inshore to enemy waters. If the submarine was forced to crash dive while they were in the casing, they must have been drowned. It was 50 [2] minutes before they got the bomb ...

  9. All clear - Wikipedia

    en.wikipedia.org/wiki/All_clear

    All clear. A British air raid siren from the Second World War. All clear is the signal, generally given by a civil defence siren, which indicates that an air raid or other hazard has finished and that it is safe for civilians to leave their shelters; it is commonly used in radios as well.

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