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  2. American Signal Corporation - Wikipedia

    en.wikipedia.org/wiki/American_Signal_Corporation

    American Signal Corporation (ASC) is an outdoor warning siren and mass notification company in the United States. ASC was founded in 1873 as Biersach and Niedermeyer (B&N). After performing poorly, the company reformed as Alerting Communicators of America (ACA) in 1968, and expanded the line of warning systems they produced. In 1992, ACA went ...

  3. Federal Signal Corporation - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_Corporation

    By this time, it made outdoor warning sirens, police sirens, fire alarms, and outdoor lighting. By 1961, Federal Sign and Signal had gone public, trading on the NASDAQ market. This was when new products started being manufactured and sold, such as the Federal Signal Model 2. In 1976, the company became Federal Signal Corporation.

  4. Federal Signal 3T22 - Wikipedia

    en.wikipedia.org/wiki/Federal_Signal_3T22

    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 ...

  5. Honolulu siren test activated about 10 minutes early; no ...

    www.aol.com/news/honolulu-siren-test-activated...

    Hawaii’s monthly siren test was activated about 10 minutes early today on Oahu. The City & County of Honolulu issued an alert saying there was an early activation of the outdoor warning siren test.

  6. Hawaii has a robust emergency siren warning system. It sat ...

    www.aol.com/hawaii-robust-emergency-siren...

    Hawaii residents have long been accustomed to the monthly tests of the outdoor siren warning system. “We rely on that emergency alert system to keep us safe from a number of things,” she told ...

  7. Here's why you might here outdoor sirens in Hennepin County ...

    www.aol.com/news/heres-why-might-outdoor-sirens...

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  8. 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 ...

  9. Why are outdoor sirens wailing? It’s annual statewide ... - AOL

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

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