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Gunshot Sensors

Discussion in 'General Gun Discussions' started by Regen, May 1, 2008.

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  1. Regen

    Regen Member

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    While read an article in the Washington Post today, I noticed the following quote:
    I had heard about experiment sensors several years ago that could pin point the location of origin for gunshots, but I did not know that they were deploy anywhere, especially not in Washington D.C.

    I also didn't know that they could determine the caliber fired. Does anyone know anything more about these? Who makes them? Are they widely deployed?
     
  2. bnkrazy

    bnkrazy Member

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  3. romma

    romma Member

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    Yep, they are deployed in numerous cities now.

    Supposedly they can differentiate between gunshots and fireworks and backfires..

    Perhaps different calibers too?
     
  4. ochmude

    ochmude Member

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    I have absolutely no clue about what this article is specifically referring to. But I do know for a fact that we're quite successfully using acoustic locators to track indirect fire attacks in Iraq for the purpose of counter-battery operations. You can get a very accurate target location (enough to drop a 155 shell on it) before the enemy shot even hits the deck. I suppose it's possible that similar systems have been developed for law enforcement use, and possibly even analyse the sound to determine a caliber.
     
  5. PercyShelley

    PercyShelley Member

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    OK, is there any reason that you couldn't record gunshots and then play them really loud back just to screw with the sensor array?
     
  6. CypherNinja

    CypherNinja Member

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    My understanding is, no. There aren't any sound systems out there capable of reproducing a sound of that volume with enough fidelity.

    And even if there were, $$$$$$$ is a bit much for a prank. ;)
     
  7. Flame Red

    Flame Red Member

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    I have heard that DC was amoung the first cities to have this system deployed. After all, they want to quickly track down all the pot shots aimed at our finer representatives.

    Besides, everyone know that there are no guns in DC because they are banned, right? Maybe the criminals have not heard about that.
     
  8. countertop

    countertop Member

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    What I don't get is how these diffrentiate between all the various calibers, barrel lengths, bullet types, etc. There just seems to be too much variety in the sensors for them to be very accurate - I guess they could focus them in on typical gunshots - say a 9mm out of a glock, a 25 out of a Lorcin, a .380 (or a 7.62x39 in Iraq) but for others it would be tough to tell.
     
  9. countertop

    countertop Member

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    Installed when the Snipers arrived
     
  10. BlackBearME

    BlackBearME Member

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    I doubt it necessarily differentiates between calibers. I'm sure, however, that they have patterned the gunshots from the standard service arms of the police. Therefore, when interpreting the data, if the sound/concussive force/The Force/whatever they use to measure it was greater, they could reasonably infer that the caliber fired was larger than the officers' caliber, without ever determining exactly what caliber was fired. Wow, that was verbose, but you get my point.
     
  11. Regen

    Regen Member

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    I could see the ability to differentiate between different calibers. The length of the barrel will have an effect on both pitch and duration of the sound of the gunshot. The caliber would only effect pitch. With enough samples of different ammo, you could build up a database of ammo, gun combinations.
     
  12. Deer Hunter

    Deer Hunter Member

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    I have slammed my car door in the car garage here at A&M and set off an entire level's worth of car alarms.

    These sensors can be fooled.
     
  13. svtruth

    svtruth Member

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    I've wondered

    why police are not equipped with a gizmo containing a microphone, GPS and cel phone that automatically calls HQ when it detects a gunshot. Any discharge seems to need back up and if the officer were disabled, help would be on the way automatically.
     
  14. Deer Hunter

    Deer Hunter Member

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    Svtruth,

    Funding perhaps?
     
  15. S4Lee

    S4Lee Member

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  16. brickeyee

    brickeyee Member

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    All they need to tell is that a different gun than the officers caused the initial shot.

    Not hard to do at all if it was significantly different.
     
  17. Grandpa Shooter

    Grandpa Shooter Member

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    YES they are deployed in many major cities and NO they don't announce it to the general public.
     
  18. WayneConrad

    WayneConrad Member

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    1. They don't work all that well.

    2. By the time the police get there, the source of the gunshot is long gone.

    Please see my post here quoting the results of the Redwood City Field Trial (ncjrs.gov).
     
  19. 21H40

    21H40 Member

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    Birmingham news announced this week (maybe late last?) that we're supposed to get some. Oh boy... I can't wait for these to finally encourage all of the criminals here to "get a haircut and a real job" .... oh... they don't actually PREVENT murder? :rolleyes:

    I feel for the cops on duty on the 4th and new years... if they have to respond to every "shooting" detected, they'll be REAL busy running in circles all night.
     
  20. LAK Supply

    LAK Supply Member

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    Gunshot sensors....

    HAHAHAHAHAHAHAHAHAHAHA! WHAT A USELESS POS THESE CITIES ARE BUYING!!! HAHAHAHAHAHAHAHA!











    Sorry... couldn't help it. :eek:
     
  21. LaEscopeta

    LaEscopeta Member

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    Not the exact caliber, but likely classes of weapons and cartridge sizes. i.e. maybe tell the different from a medium size handgun (.380, 9mm, etc) and a full size rifle (.308, 7.62 x 54R, etc.)

    I would think it would be pretty difficult to get a loudspeaker to produce the 150+ dB sound level of a gunshot.

    And how would you know?
     
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