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  2. Wikipedia:Free sound resources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Free_sound_resources

    Music Sounds Description License Zapsplat: Yes Yes Sound effects library offering over 116,000 free sound effects and music. CC0 YourFreeSounds: Yes Yes Independent, unique sound library with royalty free & free sound effects - for video, sound design, music productions and more. CC0, CC BY Gfx Sounds: Yes Yes

  3. Siren (alarm) - Wikipedia

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

    In a pneumatic siren, the stator is the part which cuts off and reopens air as rotating blades of a chopper move past the port holes of the stator, generating sound. The pitch of the siren's sound is a function of the speed of the rotor and the number of holes in the stator. A siren with only one row of ports is called a single tone siren.

  4. Emergency population warning - Wikipedia

    en.wikipedia.org/wiki/Emergency_population_warning

    It consists in a modulated sound going up and down (up to 380 Hz) during the first minute, and repeated three times. The end of alert is a continuous signal lasting 30 seconds. The system is tested the first Wednesday of every month at 11.45 in the north, 12.00 in the center, and at 12.15 in the south; for tests, the modulated signal is played ...

  5. ATI HPSS - Wikipedia

    en.wikipedia.org/wiki/ATI_HPSS

    San Francisco, California - This system is unique featuring the sound of the decommissioned Federal Signal STL-10 sirens that the HPSS units replaced; Casitas Dam, Ventura, California - This system is unique as they look like the Federal Signal Directional Speaker Array (DSA) sirens, but can have 7–8 speakers per stack, and gray caps on the speaker cones.

  6. Standard Emergency Warning Signal - Wikipedia

    en.wikipedia.org/wiki/Standard_Emergency_Warning...

    The Standard Emergency Warning Signal (SEWS) is a warning siren used in Australia to alert the public of danger. The siren is played over radio, television or public address systems in public places to warn of bushfire , flood , cyclone , tsunami , earthquake or terrorist attack .

  7. Powerful thunderstorms batter parts of Texas, threatening ...

    www.aol.com/storms-tornadoes-bad-weather...

    Parts of Texas and Louisiana were under a tornado watch Thursday night as a line of thunderstorms battered the south-central U.S., threatening the region with large hail, damaging winds and heavy ...

  8. 2000 Xenia tornado - Wikipedia

    en.wikipedia.org/wiki/2000_Xenia_tornado

    The tornado was on the ground for 9 miles (14 km), and along this path it destroyed numerous buildings and damaged hundreds more. The tornado was the first violent tornado to hit the city since 1974, when an F5 tornado would move along a near-parallel path, devastating Xenia. Safety actions taken by the city of Xenia prior to the event were ...

  9. Tennessee tornado sirens failed to sound in storm that ... - AOL

    www.aol.com/news/tennessee-tornado-sirens-failed...

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