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The Whelen Engineering Company is an American corporation that designs and manufactures audio and visual warning equipment for automotive, aviation, and mass notification industries worldwide. Founded in a Deep River, Connecticut garage in 1952, [ 1 ] Whelen has become a provider of warning lights, white illumination lighting, sirens, and ...
The Whelen siren's wail, yelp and phaser tones are a familiar sound in many cities. When an emergency vehicle is responding, it often uses audio warning devices in addition to the visual warnings provided by its warning lights. Audio warning devices are turned off once the vehicle is on-scene. Such devices include:
The exception to this is the motor carrier enforcement vehicles which use all red lighting. Ambulance and fire personel use red warning lights. In Oklahoma, any emergency vehicle may use a combination of red/blue warning lights, with the rural area police departments primarily using all blue lights and rural ambulance and fire using red.
An 1860s-era siren. [2] A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines. There are two general types: mechanical and electronic.
Aviation obstruction lighting. Emley Moor transmitting station using a red warning beacon. Aviation obstruction lighting is used to enhance the visibility of structures or fixed obstacles which may conflict with the safe navigation of aircraft. Obstruction lighting is commonly installed on towers, buildings, and even fences located in areas ...
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.
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