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2. Civil defense siren - Wikipedia

   en.wikipedia.org/wiki/Civil_defense_siren

   Most newer (and some older) electronic sirens have the ability to store digital audio files. These audio files could be custom sounds, or emergency messages. [14] Depending on the situation, the stored sound file can broadcast through the siren. [15] These sirens could also come with a Microphone Jack to broadcast live messages via microphone. [16]

3. Wikipedia:Free sound resources - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Free_sound_resources

   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 Sound library for professional and free sound effects downloads. CC0, CC BY Free To Use Sounds: Yes Yes Sound effects library with hiqh quality field recordings from all around the world.

4. ATI HPSS - Wikipedia

   en.wikipedia.org/wiki/ATI_HPSS

   Pensacola NAS, Florida, ATI HPSS16 (mostly), the sirens on Pensacola's navy base are mostly used for tornado warnings and they play the colors in the morning and evening. When a warning is issued, these siren sound ATI's version of wail signal during tornado warnings. Attack signal or other signals have not been used yet.

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

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

   Officials in Tennessee are facing questions after tornado sirens allegedly failed to sound to alert residents to the storm that killed six people.. Tornadoes and severe thunderstorms tore through ...

6. Federal Signal Modulator - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Modulator

   The Modulators in Chicago's siren system formerly used to run on the Alternate Wail tone during tornado warnings in order to vary from emergency vehicle sirens. However, in O'Hare International Airport, instead of using the main UV Wail or Attack, they use an Eclipse 8 (possibly) sound card doing attack. Before that is the Westminster Chimes ...

7. 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.

8. Warning sirens sound as multiple tornadoes touch down near ...

   www.aol.com/warning-sirens-sound-multiple...

   Warning sirens could be heard ringing out in downtown Chicago as multiple tornadoes touched down close to the city on Wednesday 12 July. The eerie sound could be heard in footage posted by Twitter ...

9. The tornado sirens went off in Port Washington on Tuesday ...

   www.aol.com/tornado-sirens-went-off-port...

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