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  2. 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.

  3. Emergency Alert System - Wikipedia

    en.wikipedia.org/wiki/Emergency_Alert_System

    CBS defended the statement, saying that the tones' usage was a "dramatic portrayal", and that it was an "integral part of the storyline about a family's visceral reaction to a life-threatening emergency". The show's sound editors achieved the effect by downloading EAS tones from YouTube and modifying the volume of the tone.

  4. Emergency Broadcast System - Wikipedia

    en.wikipedia.org/wiki/Emergency_Broadcast_System

    These tapes contained scripted attack warnings, recorded siren sounds and other emergency information for use in the event of nuclear war. [6] [7] As official information began to emerge from various sources, non-primary stations were to broadcast it according to the following priority list: Messages from the president of the United States

  5. ‘The Purge’ siren used to signal curfew in Louisiana, police ...

    www.aol.com/entertainment/2020-04-08-the-purge...

    Police in Crowley, La., had to apologize after using the siren from the horror franchise “The Purge” to signal a curfew during the city’s quarantine.

  6. 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.

  7. Federal Signal Modulator - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Modulator

    A Federal Signal Modulator siren in Bay Head, New Jersey.. Federal Signal Modulators (also known as Modulator Speaker Arrays) are electronic warning devices produced by Federal Signal Corporation that are used to alert the public about tornadoes, severe weather, earthquakes, fires, lahars, tsunamis, or any other disaster.

  8. Maui officials defend decision not to sound sirens during ...

    www.aol.com/news/maui-emergency-management...

    Maui County’s emergency management administrator on Wednesday defended the decision not to sound warning sirens in a wind-whipped wildfire that swept into the town of Lahaina, Hawaii.

  9. The Purge - Wikipedia

    en.wikipedia.org/wiki/The_Purge

    The Purge is an American anthology media franchise centered on a series of dystopian action horror films distributed by Universal Pictures and produced by Blumhouse Productions and Platinum Dunes, which are written and in some cases also directed by James DeMonaco, who was inspired by a Star Trek: The Original Series episode, "The Return of the Archons".

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