These tones encompass the upper mid-range of human hearing. We found that the Society of Automotive Engineers requires wail and yelp sirens to be between 650 Hz at the low end to 2000 Hz at the top end. The first thing we did was examine the frequency (or pitch) of the current siren. We looked into technologies that could make the siren more effective. It was determined that modern vehicles are much tighter in construction and have improved seals and insulation that effectively blocks more sound transmission than vehicles of even just 10 years ago.
We had determined from observation on-duty as a siren listener and off-duty as a signal receiver that sirens did not seem to be as effective today as they used to be. While we were examining the visual warning signals for improvement we also decided to examine the audible signals to determine if there was any way to improve these signals. Jim Wells, which evaluated and selected lighting and sirens for their use.
The idea was one of many that came about in a project, overseen by Lt. For those who may not know, the system was designed at the request of law enforcement, specifically the Florida Highway Patrol. No siren can overcome idiots and people whose heads are up their.rears. The Rumbler is a supplemental siren designed to use lo-frequency tones for penetrating into other motor vehicles where ordinary sirens fail. The Rumbler just broadens the frequency range.
Federal signal rumbler full#
The Rumbler does not stop your normal siren tone from being emitted in full strength from the normal is still there and can be heard. I am not a sound engineer, but it does make some sense to me. Larry told me that dual tone sirens, while noisy, were less effective than a single tone because the two tones often "cancelled" each other out (frequencies and such). Among things we talked about was dual tone sirens (and why FedSig didn't offer any). I have spoken to the engineer who designed the Rumbler, Larry Block. The Rumbler's amp unit will fit into any console plate that would fit one of the older SMC1-SMC5 SignalMaster controllers. Installation is not really hard, but does require a ground activation trigger, power, ground, and running two additional sets of speaker cables. It takes the siren signal and then synthesiszes it and amplifies it before sending it to its two lo-freq speakers.
The Rumbler installs by interrupting and then completing the circuit from "normal" siren amp to speaker. We’ll help you find exactly what you need to get your job done safely.Not to come off like a butt, but the OP is looking for informed opinions from those who have actually used the system or at least heard it. If you’re looking for a specific Federal Signal product you don’t see listed in our gallery, call 800-800-EBEL or contact us via email. We offer complete installation and repair on all of our Federal Signal lightbars and sirens to customers in the Northwest Ohio, Western Indiana, and Southeast Michigan regions. Federal Signal PA 640 Light & Siren Control.Other Federal Signal products we carry include: It’s that kind of innovative technology that makes Federal Signal products so valuable in the field. Ebel carries several Federal Signal products, including the popular Federal Signal Rumbler Siren, which provides low-frequency tones that penetrate and vibrate solid materials such as vehicles and sidewalks, to make your presence heard and felt. Federal Signal’s products make sure you’re as loud and as bright as you can be.īased in Oak Brook, Illinois, Federal Signal has been providing top-notch lighting and siren systems for police, fire, EMS and public safety personnel since 1901.ĭ.R.
The louder and brighter you are, the safer you are.
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