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2. Federal Signal Modulator - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Modulator

   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.

3. Thunderbolt (siren) - Wikipedia

   en.wikipedia.org/wiki/Thunderbolt_(siren)

   The Thunderbolt siren was developed between 1952 and 1990. It was the first "supercharged" siren, which uses a blower to force air into the rotor, greatly increasing the siren's volume. In the 1980s, when civil defense fell into disuse, thunderbolts across the United States were repurposed for nuclear and storm warning siren systems.

4. Federal Signal 3T22 - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_3T22

   A Federal Signal 2T22 siren. The Federal Signal 3T22 / 2T22 was a dual tone, mechanical outdoor warning siren made by Federal Signal Corporation (formerly Federal Sign and Signal Corporation) from 1952 through the early 1990s. It has a very recognizable design, having a ten-port rotor (chopper) on the bottom with ten cones (horns) and a 12-port ...

5. Federal Signal Model 2 - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Model_2

   The Model 2 features a 2 HP universal motor powering a single-tone 5-port chopper motor, which was also used on the Thunderbolt 1000, another siren once made by Federal Signal. It can produce 3 signals at 102 dBC: The Model 2 is 25.5 inches tall by 12 inches wide, and weighs 68 lbs. It can be roof-mounted or pole-mounted, at a recommended 35 ...

6. Hear an outdoor emergency siren in the county? Here's ... - AOL

   www.aol.com/hear-outdoor-emergency-siren-county...

   One of 67 of the St. Joseph County outdoor warning sirens are in place Monday, Feb. 27, 2024, at 1511 Milburn Boulevard at LaSalle Elementary School in Mishawaka.

7. List of sirens built by Alerting Communicators of America

   en.wikipedia.org/wiki/List_of_sirens_built_by...

   This siren is similar to Federal Signal's Thunderbolt series. Only a single unit remains in service in Milwaukee, WI. Screamers Electro-Mechanical 2, 5, 7.5, 10 8, 9, 9/12, 10/12 1968–1994 Omni Directional 102–115 dB at 100 ft. Series of small vertical sirens, comparable to Federal Signal Corporation's vertical sirens. Sentry 95

8. Why are outdoor sirens wailing? It’s annual statewide tornado ...

   www.aol.com/news/why-outdoor-sirens-wailing...

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9. Hawaii's emergency warning sirens weren't activated to alert ...

   www.aol.com/news/hawaiis-emergency-warning...

   Weintraub said the outdoor siren system was designed with the two main threats to the island in mind: hurricanes and tsunamis. "A wildfire of this magnitude was unprecedented," he said.