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One of the largest Alertronics. These had 24 CJ46 horns, each driven by three 100 watt drivers. The total wattage is 7200 watts. They were configured with three rows of horns, each row having eight horns around. These sirens were used in the Oak Ridge, TN siren system, and are not known to be installed elsewhere. AL-1000/AL-2000 Electronic none ...
To direct a siren's sound and to maximize its power output, a siren is often fitted with a horn, which transforms the high-pressure sound waves in the siren to lower-pressure sound waves in the open air. The electrically powered cylinder siren used to alert the town of Lowestoft during World War Two.
1 Alerting Communicators of America (ACA) sirens. 2 ATI sirens. 3 Federal Signal sirens. 4 Other. Toggle the table of contents. List of civil defense sirens. Add ...
The Federal Signal 3T22 and 2T22 are dual-tone, mechanical outdoor warning sirens made by Federal Signal Corporation (formerly Federal Sign and Signal Corporation) from 1952 through the early 1990s. Both have a very recognizable design, with a ten-port rotor (chopper) on the bottom with ten cones (horns) and a 12-port one on top with twelve cones.
EOWS* 612 – 1200 Watt rotating siren with 6 circular University Sound DR-42 speaker horns. The 612 was the most produced model of the SiraTone series. EOWS* 812 – 1200 Watt rotating siren, with 8 circular University Sound DR-42 speaker horns; was discontinued and succeeded by the EOWS* 612.
A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to warn city dwellers of air raids (air-raid sirens) during World War II, they were later used to warn of nuclear attack and natural disasters, such as tornadoes (tornado sirens).
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