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Thread: The Rumbler, NYPD Siren.

  1. #1

    Default The Rumbler, NYPD Siren.

    City Critic

    The New Police Siren: You’ll Feel It Coming

    Emily Berl for The New York Times
    NOW HEAR THIS The siren called the Rumbler penetrates car doors.

    By ARIEL KAMINER

    Published: February 25, 2011

    Joe Bader tried setting the two tones of his invention four notes apart on the musical scale, but the result sounded like music, not a siren. Same thing when he played around with a five-note interval. But when he set the two tones apart by two octaves and gave the siren a test run outside the Florida Highway Patrol headquarters in Tallahassee, the effect was so attention-grabbing that people came streaming out of the building to see what the strange sound, with its unfamiliar vibrations, could possibly be.

    PLAY AUDIO ON THIS PAGE



    Emily Berl for The New York Times

    ON THE BEAT Officer Jeff Donato demonstrated the Rumbler for the City Critic.

    Which was precisely what Mr. Bader, a vice president at the security firm Federal Signal Corporation, was going for: a siren that would make people sit up and take notice — even people accustomed to hearing sirens all the time. Even people wearing ear buds or talking on the phone. Even people insulated from street noise by a layer of glass and steel. Even New Yorkers.

    Rumblers, as Mr. Bader called his invention, achieve their striking effect with a low-frequency tone, in the range of 180 to 360 hertz (between the 33rd and the 46th key on a standard piano keyboard), which penetrates hard surfaces like car doors and windows better than a high tone does. When it is paired with the wail of a standard siren, the effect is hard to ignore — like the combination of a bagpipe’s high chanter and low drone, or perhaps like a train whistle and the caboose that moves that whistle through space.

    Following the lead of some other municipalities, the New York Police Department gave the devices two limited test runs beginning in 2007. It liked what it heard, with the result that a Rumbler will be coming soon to a police car near you — perhaps one speeding right at you in a high-speed chase through traffic- and pedestrian-clogged streets. And eventually to about 5,000 of the department’s more than 8,000 vehicles.

    Some New Yorkers have already raised concerns that the Rumbler’s low-frequency vibration could be injurious to their health. The Police Department insists that there is nothing to worry about and invited me to experience the effect for myself. But when Officer Joe Gallagher, a department spokesman, considered the fact that I am in what used to be known as “a family way,” he suggested that I not actually ride in a Rumbler-equipped squad car. “I don’t want you sitting in the back and going into childbirth,” he said. “I’m not handy with that.”

    I’m not so handy with it either, so I rode in Officer Gallagher’s car while Officers Jeff Donato and Matthew Powlett of the 10th Precinct drove ahead of us, Rumbling as they went.

    We zoomed up the Franklin D. Roosevelt Drive on what appeared to be the only day in recent history that it was free of traffic. When at last we did encounter at least a few other cars, the officers in the front car flipped on the Rumbler, switching among its sound effects: the wail, the yelp, the hi-lo, the fast stutter.

    The Rumbler is no louder than a standard siren. In fact, it’s quieter — 10 decibels lower, which translates to only half the volume. But because low-frequency sound waves penetrate cars better than those at a higher pitch, drivers experience the Rumbler as much louder than a standard siren. That’s good news for pedestrians who might prefer not to be deafened, though not necessarily for the officers in Rumbler-equipped cars. To spare the officers’ ears, the device cuts off after eight seconds.

    But the officers who demonstrated it for me said they had used it in repeated intervals for longer durations. And though Federal Signal describes the Rumbler as an “intersection-clearing device,” the officers also recounted using it while zipping up long stretches of highway. “It’s like the Red Sea parting,” Capt. Christopher Ikone said.

    Low-frequency sound can have physical effects, like making you feel queasy. Enough, in fact, to be of interest to some weapons manufacturers, but their experiments take place at much lower frequencies and much higher amplification than the Rumbler employs. In fact, despite the siren’s name, the rumbling effect is subtle — far less than what you experience when an Escalade rolls up beside you at a stop light, tinted windows lowered, custom speakers blaring and thunder bass thumping. Hearing a Rumbler while standing on the street, I felt a slight tingle under my ribs; in Officer Gallagher’s car, I felt a gentle reverberation on the seat.

    I can faithfully report that the Police Department’s newest and soon-to-be-ubiquitous emergency alert signal does not cause eyeglasses to sprout hairline cracks that branch out across the lens and hang there for one long moment before the entire thing shatters with a delicate “plink,” as in some Bugs Bunny cartoon. Nor does it reprogram the rhythm of your heartbeat, the way a loud song on the radio can make you completely forget what you’d been humming when you heard it. Nor does it induce premature labor in pregnant women. It may, however, have caused an innocent citizen heart palpitations.

    As we zoomed back down the F.D.R. Drive, dual-tone sirens blaring so we could see the other cars scatter, the driver of a Toyota RAV4 apparently thought he was being singled out and pulled to a complete halt — in the left lane of the highway. That’s an unwise thing to do in any case; an extremely unwise thing to do when you’ve got a police cruiser right behind you.

    If the driver did sustain any coronary distress from the incident, help was nearby: a Fire Department ambulance was driving just a bit farther south. As we passed, its siren let out a few warning bleats. But they were the old variety: one tone, no tingling. Compared with the basso profundo confidence of a Rumbler, it sounded like a jealous whine.


    E-mail: citycritic@nytimes.com

    http://www.nytimes.com/2011/02/27/ny...er=rss&emc=rss
    Last edited by brianac; February 26th, 2011 at 08:51 PM.

  2. #2
    Disgruntled Optimist lofter1's Avatar
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    Oh, jeez ... just what we need. An earth shattering blast that will no doubt penetrate my walls & windows as the boys in blue zoom down Broadway.

    And the part about low tone weapons that can make people hit the ground is really scary. If they use those during political demonstrations it will be like forced non-violent civil disobedience: an intersection full of inert bodies (but thankfully unhurt for the most part, if Mr. Bader and crew are correct).


  3. #3

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    I've heard them, it's not that bad. But you do notice it.

  4. #4
    Chief Antagonist Ninjahedge's Avatar
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    The low tone weapons are much lower, below the audible range I believe, and MUCH higher in amplitude (volume).

    Also, having a bunch of people passing out and vomitying on the street may make it a bit easier to clean (in one way) but, obviously, much harder in another....


    Back to rumble... I think it is needed. In my new Accord, I find it hard to hear some of teh sirens and other things I used to hear much more easily in my previous car. SO long as this is not something that is used and abused I have no problem with it.


    Now when are they going to install monitors in the car to see when these cops turn it on just because they are at a light and want to get to lunch faster?

  5. #5
    Chief Antagonist Ninjahedge's Avatar
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    Sorry zip, I did a search and came up blank....


    I keep hearing this siren... It is really eerie.....

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