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  2. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    The air-raid sirens are called אזעקה (az'aka 'alarm'), and consist of a continuous ascending and descending tone. The "all clear" signal, called צפירת הרגעה ( tzfirat harga'a ), is a constant single-pitch sound.

  3. Chrysler Air-Raid Siren - Wikipedia

    en.wikipedia.org/wiki/Chrysler_Air-Raid_Siren

    Siren at the Walter P. Chrysler Museum in 2011. The Chrysler Air Raid Siren is an outdoor warning siren produced during the Cold War era that has an output of 138 dB(C) at 100 feet. It was known as the Chrysler Bell Victory Siren during its first generation, which was between the end of World War II and the fall of the Berlin Wall. It is ...

  4. Siren (alarm) - Wikipedia

    en.wikipedia.org/wiki/Siren_(alarm)

    Electronic Sirens Pavian by Telegrafia A Whelen WPS electronic siren imported to Saudi Arabia by HSS Engineering for use as a civil defense siren. 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 ⓘ An 1860s-era siren. [2]

  5. South Korea holds first major air raid siren drills in six years

    www.aol.com/south-korea-holds-first-major...

    The 20-minute-long exercise kicked off at 2pm local time on Wednesday with sirens blaring on a rainy, but hot summer afternoon in downtown Seoul. The air raid alarm remained in effect for 15 ...

  6. Honeywell Gent - Wikipedia

    en.wikipedia.org/wiki/Honeywell_Gent

    Model 1102 call points could be used on AC or DC fire alarm systems. Gent continued making sirens such as the Model 1500, often used in large open areas or industrial spaces. The model 1500 sounded very similar to air raid sirens. Following the acquisition by the MK Electric Group, Gent (now Gent Limited), continued producing life safety ...

  7. Air-raid siren throughout Ukraine: Russians launch missiles - AOL

    www.aol.com/news/air-raid-siren-throughout...

    As of 13:41 on 5 December, an air-raid siren was sounded in most regions of Ukraine due to the threat of Russian missiles. Source: Alarm Map Details: The head of Odesa Oblast Military ...