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2. Federal Signal Modulator - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Modulator

   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. They are identified mostly by their distinctive stacked "flying saucer" design.

3. Thunderbolt (siren) - Wikipedia

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

   A Federal Signal Thunderbolt 1003 siren. The Thunderbolt is a mechanical outdoor warning siren that was manufactured by Federal Signal Corporation from 1951 until its production ended in 1991. [1] It is a unidirectional, rotating siren with a large square-shaped horn, and can come in various colors, usually yellow, by request.

4. List of sirens built by Alerting Communicators of America

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

   The i-Force is an electronic siren made by ASC that comes in many different sizes (Sound Cells). Similar to Federal Signal's Modulator. E-Class Electronic none none 2002–Present Omni Directional dB rating depends on how many drivers. 400 watt speakers can be arranged in whichever pattern is needed. Very similar to ATI's HPSS omni-directional ...

5. List of civil defense sirens - Wikipedia

   en.wikipedia.org/wiki/List_of_civil_defense_sirens

   Federal Signal Modulator; Federal Signal STH-10; Other. Chrysler Air-Raid Siren; Sentry Siren; SiraTone This page was last edited on 5 August 2024, at 16:06 ...

6. Federal Signal Model 2 - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Model_2

   The Model 2T was an omnidirectional siren manufactured by Federal Signal from the 1950s to the 1980s, mainly to fulfill the civil defense requirement for dual-tone warning signals. It had exactly the same design as the Model 2, but instead of a single-toned, 5-port chopper, it featured a dual-toned, 4/5 port chopper which produced 100 dBC at ...

7. Federal Signal Corporation - Wikipedia

   en.wikipedia.org/wiki/Federal_Signal_Corporation

   Federal Signal Corporation is an American manufacturer headquartered in Downers Grove, Illinois. Federal Signal manufactures street sweeper vehicles, public address systems, emergency vehicle equipment, and emergency vehicle lighting. The company operates two groups: Federal Signal Environmental Solutions and Federal Signal Safety and Security ...