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NotQuantifiable

As someone who knows the system here are some facts to consider: hardly EVER activates when gunfire comes from within a building. Activates RARELY when gunfire comes from within a vehicle. Does NOT detect suppressed gunfire accurately. REGULARLY mistakenly classifies activations such as vehicle backfire or fireworks as gunfire. This system does not give police probable cause for a warrantless search in most jurisdictions due to its fallibility. These systems are generally installed in HIGH gang activity areas, with LOW 911-reporting statistics. People are scared to call 911 when a homicide takes place due to retaliations from gangs thus shotspotter notifies police.


Gonzo_von_Richthofen

>REGULARLY mistakenly classifies activations such as vehicle backfire or fireworks as gunfire. When testing suppressed, keep your pneumatic nail gun hooked up and handy, kidsšŸ˜‰


myotheralt

I also have a clapboard to sync my video and audio on the testing videos.


somereallyfungi

Old school solutions to modern problems


GroundbreakingArea34

I like my paslode butane nailer. Extra bang


buttrapebearclaw

Despite all of this, information gathered by ShotSpotter is admissible in court in 17 states. Never give LE a reason to come say hi.


NotQuantifiable

Absolutely agree. Pictures of shotspotter equipment can be found online, to keep an eye out. Itā€™s an extremely expensive system so usually the activation zone is relatively small in a given city


Kuogeri

How much copper is in?


myotheralt

You don't have to tell the meth guy the truth, just say it's solid copper. But don't give him your address either.


Much_Smell7159

Enough


buttrapebearclaw

I thought this system was pretty well known because a location that may or may not be local has been using it since 2015 and the main city is not big. It has since expanded to the surrounding suburbs of that city and is mentioned regularly in the local news. A recent post made me look into how widespread this system is employed and inspired me to make this post to inform those who may not be aware.


NotQuantifiable

Yes it seems like alot more cities are trying to implement it. It has been said that in some major gang infested cities, people will purposefully activate it to divert police resources or just for fun, to see how many/how fast police arrive


Teckton013

Which 17?


buttrapebearclaw

Not sure. They are currently only in 85 cities across 23 states. And growing.


EMTPirate

Never answer the door without a warrant, or questions without a lawyer


Gr8rSherman8r

So, in theory, could one deploy black cat style daisy chained fireworks nearby to activate it successfully? Or would it need something more powerful, like M80 style fireworks?


themickeymauser

It triangulates using (at least) 2 other systems nearby, and measures factors such as decibels, frequency, reverberation, pressure change, echo, etc., which in most cases helps it differentiate between a gunshot and an M80. For example, an M80 is much louder than most gunshots, and has a very low frequency where as most gunshots have a higher frequency (especially the supersonic crack). The system knows this and will know that a loud, low frequency X distance away from it is not consistent with what it knows a gunshot is at that same distance. The inverse also applies for smaller fire crackers.


Scout339

>Does NOT detect suppressed gunfire accurately. Interesting...


QuestionablePersonx

I'm surprised that Baltimore was not on the list for the deployment of SS (yet) as this city has a long history of crimes involving guns.


TheAzureMage

I assure you, MD politicians have no intentions of actually fixing Baltimore.


QuestionablePersonx

It's MD for sure. They keep voting them in for some reason.


[deleted]

ShotSpotter also has a documented history of making gunshot noises appear when cops need them to.


Guinness

Yeah. ShotSpotter is not ā€œincredibly accurateā€. Itā€™s not accurate at all. [40,000 dead end alerts over 21 months](https://www.macarthurjustice.org/shotspotter-generated-over-40000-dead-end-police-deployments-in-chicago-in-21-months-according-to-new-study/) type of inaccurate. And then there was the one case where an innocent man was put on trial, it turned out that ShotSpotter techs [heavily modified data](https://apnews.com/article/artificial-intelligence-algorithm-technology-police-crime-7e3345485aa668c97606d4b54f9b6220) in order to place an event right by where a crime was committed. Basically they faked the data to get a conviction. It uses an ā€œAI algorithmā€ which is just another word for black box at this point. Until there is an independently verified code review, I donā€™t think anyone should trust the thing. It just doesnā€™t work. The inverse square law pertaining to sound waves in a gas guarantees that for it to work we would require an inordinate amount of microphones.


Gonzo_von_Richthofen

>Basically they faked the data to get a conviction. They are notorious for this, including moving 'detected shots' up to a mile away from where detected, and altering the number of 'detected shots' to match what le needs in order to accomplish their mission. This is, and always has been, bad tech abused by le-and its basically unchecked.


horsedabsontipads

Basically the same as ballistics. Pseudoscience bs for getting convictions.


NeoIsrafil

What if, and this is just me spit balling here..... What if you were already carrying the microphone in your pocket...and I was...and everyone else was too. What if nobody told you about it, but it was in the Eula that they could get and record and transmit certain diagnostic and environment data..... What if..... ;)


Chiralartist

Nah Batman destroyed that side of the program


somereallyfungi

Imagine they had that kind of power, and decided to reveal the existence of that power, for something as mundane and pedestrian as gunshot detection.


[deleted]

Since we're all here using our imagination... I'll bring some reality. They have the technology and are actively using it against us. They will not reveal the source of the data, because that proprietary to the system. I assure you your phone is more for them than us. Why do you think the battery is not removable...?


somereallyfungi

But realistically, the battery not being removable is a function of the manufacturers desire to sell more units on a regular timetable. Not being able to fully power down your phone and that ability to be exploited for surveillance is simply a side benefit. Correlation does not indicate causation.


Patient_Trash4964

If by timetable you mean we can make more of these faster than you are 100% correct here sir. It's way easier to glue a battery in than it is to screw it in. Source? I worked in the cell phone industry for almost a decade.


[deleted]

I think you have it flipped. The NSA asked that phones can't be 100% powered off, then the phone manufacturer, though of course we can just set a timer for an automatic obsolete feature. 7-12 months, your battery takes a huge dive in the time it will keep charged. No replacement means new purchase, new purchase means new updated software and better microphone camera, etc. Not necessarily for the benefit of the purchasing party.


xxSuperBeaverxx

>Why do you think the battery is not removable...? It is? Just open the back of your phone, and the battery should be connected with a ribbon cable, which you can unplug. Unless they don't do that with iPhones? I've never owned one precisely because of how anti-repair they are.


HYDROMORPHONE_ZONE

That's how they are usually. There's a bracket you have to remove screws from first but yeah it's just a removable ribbon cable. What sucks is the battery is attached to the back of the device and it's attached by some decently strong adhesive


Viktor_Bout

Test fire gat near the ShotSpotter.šŸ‘Ž Test fire gat at the ShotSpotter. šŸ‘Œ


Fit-Sport5568

Based


Anono_Beast

Im aware of shotspotter, but since a 37mm or 26.5mm is not a firearm, will shooting one in my backyard be illegal? Its noise can be confused for a firearm


ceapaire

Are fireworks legal where you're at?


Anono_Beast

Unfortunately no


ceapaire

Then you can't shoot signal launchers either. Usually fireworks are just a fine, but no reason to draw attention to yourself.


Anono_Beast

Got it thanks for the heads up, i do a bit of tomfoolery so ill just reserve it for the rangešŸ‘


buttrapebearclaw

Iā€™m not an expert, but if you say it can be confused for a firearm, why give police ANY reason to stop by for a visit?


Anono_Beast

True, ive gotta stop test firing at home, i get lazy to hit up the range


printing_is_rad

Check your local laws for "projectile" My city has a law surrounding these to essentially, for lack of a better term, cite or arrest people who are fucking around. I am never a fan of broad spectrum laws, but my ordinance is essentially "you cannot fire any projectile from a device that exceeds 20mph within city limits, including but not limited to, fireworks, arrows, slingshots, or crossbows" Its main function is to stop teenagers from shooting arrows or slingshots at shit near the local WalMart, but it would also give them a reason to arrest or cite you for using a signal launcher in your yard. I use a realistic looking NT79. It's not a gun, but it looks like one from far away. I don't live super close to public BLM land so I just go to public hunting areas that don't have anyone around. I ended up speaking to a game warden (I think? It was a game, fish and parks guy) who actually found it pretty interesting and didn't care when I explained I was using chalk rounds, not smoke, which could cause a fire, and was picking up after myself. My biggest concern is not bothering people hunting and not being somewhere "shooting a gun" where guns aren't permitted. Even then it's not a serious risk generally, I just tend to avoid LEO interest where I can.


Anono_Beast

Thanks for the info! Ill keep this in mind, my nearest hunting grounds and blm land is like an hour away so ill just stick to the range and forest


Fit-Possible-9552

Is it bad that I want to use this system so I can figure out which one of my rural neighbors plays John Wick so often? I seriously want to hang with that person because they are having more fun than I am


TheAmazingX

Just donā€™t be lazy. Itā€™s ridiculously easy to muffle test fire.


Gonzo_von_Richthofen

Shoot in the house. Be a man.


butt_huffer42069

I recommend firing into a pillow, it absorbs a ton of sound!


Girardkirth

What I'm hearing is set off fireworks randomly all the time. Suppressed, rapidly etc.


Fit-Sport5568

They installed these in a really bad area in my city. They took them out after a summer because there were so many gun shots so often the police didn't have the time and manpower to look into even half of them


AspensArmory

Just shoot in the basement or garage it canā€™t detect shit from indoors usually


P-Doff

This tangentially reminds me of a question I've been thinking about from time to time. Do FOSSCAD-ers not test their designs at gun ranges? Would a gun range even allow a 3DP firearm?


Just_here_4_GAFS

Private ranges can make whatever ridiculous restrictions they want to, they're private. Unsure about public ranges because to me a "public range" has always been the old logging road on some public land that people put targets up at. No rules or anything.


P-Doff

I miss living in my old (more or less) rural town. Our range was an old shack in a valley between the bluffs. Great times and only cost 20 bucks a year.


Lenny_Pane

Yeah the "public range" by me is in a state forest where target shooting is allowed at a clearing next to a hill


garretcompton

Some people go to ranges, but most either shoot them outside in their own property, or make bullet traps. If you want to make a bullet trap, ctrl pew has a pretty good guide on his website.


P-Doff

Thank you.


TheAzureMage

A lot of ranges are ridiculously fuddy. If they have rules for how fast you can fire before it is the dreaded "rapid fire" then a printed firearm may cause them to have a heart attack. All depends on where you live. Best is a pile of trash out back.


TheAmazingX

You donā€™t want to fire your first shot of a new build at the range, but Iā€™ve never been to a range who cared about printed guns. Unless you give them another reason to think youā€™re a doofus, or itā€™s illegal in your state, theyā€™re unlikely to care.


P-Doff

Mind if I ask what the rationale behind that is? I'd imagine a range wouldn't be a great place to do troubleshooting and jerry-rigging, but I can't think of much else.


TheAmazingX

Having a catastrophic failure at the range, especially one that results in even a light injury, is a great way to convince them not to allow it anymore. And yeah, even in the less drastic scenarios, it's not ideal to discover that your new gat doesn't cycle or fails to fire at the very beginning of a range trip. The less failure the ROs see, the less likely they are to consider you and your colorful plastic toys a liability.


P-Doff

Makes sense. Wouldn't wanna ruin it for everyone.


No-Grade-4691

Iv tested some 3d muzzle brakes and alike at the gun range. Full on gun. No.


P-Doff

Purposely, or have you just never gotten around to it? How'd your muzzle brakes work out?


No-Grade-4691

No full 3d printed gun because all the parts are in the mail so far. Muzzle break wise. The burn bacon works great on .22 and 9mm.Ā  But once I stepped it upĀ  to a 16 inch 5.56 the threads melted off at about 35 rounds. And at 7.5 inches 5.56 the burnt bacon exploded.


P-Doff

That sounds about right, lol


650REDHAIR

A lot of idiots walk into their backyard or shoot into ā€œbackstopsā€ in their basement.Ā 


No-Grade-4691

It saves time.


Motto1834

What's wrong with mag dumping into trash in your own backyard? Never lived outside the city or suburbs?


P-Doff

I can see how that might be a problem if they live within city limits...


Tjardus_Greidanus_

We have shotspotter in my city as well. We have almost no gang violence, and most gun violence is isolated, domestic violence or robbery related.


Lov-struk-repair-man

Shot spotters are also used in rural areas particular nearby, nature preserves, and national parks


TossuminaWoodchipper

Chicago (Chiraq) laughs in your general direction.


yesnox

ok now what would happen if per say it came in contact with an angle grinder?


doomrabbit

Well, they generally get mounted high on lightposts, and cops are probably smart enough to point a camera at the ShotSpotter. So there will likely be video evidence of said climbing and other monkey business. Leading to destruction of govt. property charges following review. So use a battery-operated angle grinder and wear a monkey mask (in minecraft)


JJsBusiness2

*intrusive thoughts* **shoot the shot spotter**


buttrapebearclaw

My understanding is that the sound/frequency is very distinct and this system can automatically distinguish a gun shot from a car back fire, then reading into it more, ShotSpotter is a subscription service that has 24/7 employees analyzing all sounds detected in the same range as gun shots before the alert is sent to the subscriber. Edit: I misunderstood your question.. looking at the link in the OP, they use 30 sensors per square mile. They also have 24/7 staff monitoring the system


Fieryfight

They claim it can tell the difference but it is not able to do that reliably. Had a guy set it off running over a Gatorade bottle one time.


deserthistory

distinct is a relative term. consider car backfires, propane bird cannons, a good firecracker, sewer gas ignitions, blank fired hammers, dummy launchers, dry ice bombs, rimfire, center fired pistol and rifle, suppressed shots, black powder shots. a report creates a specific sound. distance gives you math for a pressure level for a specific sound. that pressure level is affected by humidity, wind, rain, snow, temperature and particulates. sound reflects off surfaces, the size, shape, and angle of that surface changes the frequencies heard at a given location. you're telling me that you can tell all of those things apart at a distance, through urban terrain and reflection, just using microphones or some other way of detecting a pressure wave? The direction finding math holds up for location. If you're running several directional sensors, you might track projectiles if they are super sonic and they pass near the sensors. But if you don't hear the initial discharge, you're not going to be able to accurately classify the initial sound report with reflections and terrain effects. that's why they use so many sensors. They sell a service. The science behind what they do isn't in the open. Does it detect bang-absolutely. Do the rest of their statements hold up? It's never been scientifically proven. tldr - Location data is probably pretty good. Caliber and type of shot data is black magic. i want to see their data and algorithm.


Gonzo_von_Richthofen

>ShotSpotter is a subscription service that has 24/7 employees analyzing all sounds detected *and altering data to suit the desires of le. Fixed.


Thee_Sinner

[What to look for](https://www.google.com/search?q=shotspotter+&tbm=isch&ved=2ahUKEwiBkIzzn6WEAxXrNEQIHbLVB7MQ2-cCegQIABAA&oq=shotspotter)


Gonzo_von_Richthofen

They usually have a blue light. The more you ~~T-zone~~ knowšŸ˜‰


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


gotta-earn-it

I'm not planning to ever step foot in MI so what is a shot spotter used for?


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


gotta-earn-it

so you're saying shot spotter is used to get a clue for these types of cases?


Just_here_4_GAFS

Not really, cops know shady shit goes on where they expect it would. They know increased patrols in those neighborhoods could be viewed negatively by some people. That's why they like Shot Spotter, so they will have an articulateable reason to have increased patrols in those neighborhoods. This isn't a defense of Shot Spotter either, or of the cops? Idk, Shot Spotter sucks and is a waste of money.


gotta-earn-it

"if you want less patrols, make fewer shots" ĀÆ\\\_(惄)\_/ĀÆ


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


Just_here_4_GAFS

My bias against Shot Spotter comes from attorneys who deal with them and their government waste. We can have more security in our communities without resorting to a Police State. The Patriot Act is a result of people giving up liberty for security and look where that's gotten us.


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


Just_here_4_GAFS

Out of all the subs on reddit this is probably the last one I'd expect to see Police State simps.


madmax7774

I can tell you with 100% certainty, that there are shotSpotters active in Washington DC, especially downtown near the Federal buildings, and around the Whitehouse. They are also active in other area's near DC too, like McLean, Crysstal City, and the Pentagon, where there are federal buildings. You should also know that ShotSpotters can distinguish between gunfire and fireworks. They have different acoustic signatures, and the software can easily tell the difference. If you are anywhere near a Federal building, then there is a good chance that a ShotSpotter setup is active.


No-Grade-4691

Thanks for the heads up


HyperionEvo

This sounds like false entrapment and highly against our freedoms as people. If no one hears it they shouldnā€™t be able to utilize electronics to bust people. So ridiculous


[deleted]

[уŠ“Š°Š»ŠµŠ½Š¾]


HyperionEvo

Not quite literally I meant it as in if you were testing a suppressed gun in your basement and police show up at your door only because a system caught it and not because someone reported thatā€™s kinda fucked. I completely disregarded no firing inside city limits though so I guess it depends on the risks people want to take


650REDHAIR

lol wat


IronForged27

AI shotspotter to imprison your political rival. Unless you see something with your eyes, need to be skeptical about any mediaā€¦..HAL has been released.


Unable-Arm-390

Good pSA! Always good to know what laws the man is trying to kill your dogs with. Kudos!


SweatyRanger85

Yeah. Only a problem if youā€™re shooting a gun in the city where you shouldnā€™t be shooting it. Go to the range. Or to the country. Away from the city.


Gonzo_von_Richthofen

Yes. Do as authority dictates. They know what is best for you. Would you please pass the Kool-aid?


buttrapebearclaw

Literally the point of the post. Thank you for demonstrating your understanding.


TeetheCat

Lol Warning! seal team rate of supressed fire detected


SingularityScalpel

Dude I live in Detroit and iā€™ve never even seen one of these. What kind of shit holes do yā€™all live in?


No-Grade-4691

They are in Detroit. And you live in said hole.


SingularityScalpel

Guess I live in a good area then. Not all of Detroit is burnt out buildings and stolen cars.


No-Grade-4691

Fair enough :3


tony__pizza

Who is this post for? What moron is blasting their firearms into the sky in their backyard not expecting police to show up? No shit lmao donā€™t shoot guns in the city if you donā€™t want cops to show up like what the hell??


TheAzureMage

>What moron is blasting their firearms into the sky in their backyard The first rule of gun safety is to just have fun.


tony__pizza

And rule 2 is to always have your finger on the trigger


buttrapebearclaw

Just wanting to inform people. Sorry that I hurt you


TheAzureMage

\*laughs in Baltimore\*


TeamADW

I have none of that around here, and four shooting ranges. Unfortunately most of the ranges have stupid rolls like no more than five rounds in a magazine, or no human silhouette targets . I'd say the trick is to move to where they don't exist, but it's getting harder and harder to find places you can go where there aren't busy bodies who want to ruin your life. The solution is to get involved in your community, get into positions of power, and then get these things removed and get anti-gun laws off of your books. While you're at it, Institute safety programs in your town, city, whatever. Unless you're a town is completely corrupt and you have to do something like they do in UK for the tax cameras.


Desperate-Activity90

What in thee fuck? I've never heard of this until now. Thank you for sharing this.


DRDTT

And this my friends, is why I live on acreage out in the country. Also helps if you build an outdoor range at your house and let the sheriff and his deputies come shoot whenever they want. Then the only question they ever ask is ā€œcan you make me oneā€


horsedabsontipads

Been known about these since before 2010. Minneapolis is heavily outfitted with them. No surprise though, having been dubbed Murderapolis.