"The concept of these trucks is to be available citywide for any employee who needs to get in the truck and tow trailers full of equipment," Lee said.
Other than that, the trucks look like a regular city vehicle they're white with city decals. Other city officials use the amber-colored lights. Police have a special key that activates the redĪnd blue lights and the siren. San Francisco's trucks are equipped with the Rumbler and a light bar with two modes, one for police and one for other city personnel, including the medical examiner. "The Golden Gate Bridge is a target, and we have other buildings that are considered high-risk and are targets." "We have trailers with weapons of mass destruction chemical suits and medical equipment ready to haul, but we had no way to tow them," Lee said. For example, the medical examiner has a mobile morgue and trailers that would need to be towed by a heavy-duty vehicle. San Francisco purchased the trucks and equipped them with the Rumbler in case the need arose to haul equipment through city streets during a disaster.
#FEDERAL SIGNAL RUMBLER FREE#
California agencies were free to use the Rumbler as of December 2007. Californians are just now getting a taste because of more stringent vehicle codes concerning light output and sound that had to be addressed. The Rumblers are being tested or used in a few cities across the country, including New York, Washington, D.C., and Elk Grove, Calif. The low-frequency tone can penetrate and shake solid materials, allowing anyone nearby to actually feel the sound waves and perhaps even witness their rearview mirror shake. It's not an overwhelming violent shaking, but a subtle feeling like a freight train kind of a rumbling."Īccording to manufacturer specifications, the Rumbler interacts with 100/200-watt siren amplifiers and provides a secondary, low-frequency tone. That alone gets attention, but then you will actually feel it. It mimics the tone but it's done at a much lower hertz level. "It just provides a contrast to the typical high-frequency siren. "It's an additional tool to combat distracted drivers, whether they have the stereo on, air conditioning, cell phones or general ambient noise," Sanchez said.
The list price for the whole shebang is $685, according to Carlee Sanchez, senior district sales manager for Federal Signal.
#FEDERAL SIGNAL RUMBLER DRIVER#
Now San Francisco has two 2008 Ford F-450s equipped with the Rumbler, which consists of a slave amplifier, a timer that's activated when the driver taps the horn, two speakers that operate like subwoofers and a mounting bracket. That day Lee knew the Rumbler would work as needed during a crisis. If it had been a regular siren, people would have pulled in front of me like, 'What do you want?' but everyone got out of the way." They were stopping to see what was going on. "Cross traffic was at a standstill as I went back to City Hall. "I'm watching people two and three blocks ahead of me, frozen with their hands covering their ears," Lee said. On went the siren, red and blue lights flashing, and then the unique feature of the Rumbler - the high-output speaker and subwoofers bounced low-frequency sound waves off buildings and vehicles. Kit, pair mount brackets with hardware.He tapped his horn, activating the Rumbler. Kit, pair of mount brackets with hardware for Dodge Charger police package vehicles, 2015-2023 Single Rumbler Woofer for use with Pathfinder® sirenĭual Rumbler Woofer for use with Pathfinder siren Used with PF200 to utilize dual-tone and Rumbler capabilities Siren Amp, Rumbler, secondary warning system, 12 VDC, low frequency tones, hardware kit, housing bands and cradles.
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