How to jam/disrupt/stop Car Sound System

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Hi guys!

I would like to know which is the better way to silence loudy neighbours' car sound system.

I already work with RF systems for a while, and I know I could build some kind of white noise transmitter, but to generate enough power to cause interference, I would have to work with valves(which is something I don't know how to...), and many issues with size of a needed antenna.

Any of you could help me with ideas(EMP/LF transmitter/Burn speakers inductor, etc.)?
I beg for your knowledge.

Thanks.

PS: No, I will not talk to them and ask to turn it off...Those guys are brainless for too long....

Last Edited: Sun. Jul 1, 2018 - 01:54 AM
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Sounds dangerous and illegal.

Don't all the new car stereo's have IR remotes ? How about a powerful- or focused IR transmitter. That would certainly be less dangerous and probably not illegal either.

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it"

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Call the police. In my neck of the world it's illegal to operate an audio system in a vehicle that can be heard from 50 feet no matter what day or night.

YOu might have a problem using a jammer or anything else for that matter as most of the time a radio station is not being played, but an MP3 player or CD is instead.

Now there may be one more thing but it is a long shot. Many mp3 devices also have bluetooth units in them, and the owners of the devices are usually not bright enough to change the passcode(usually 1234 by default) or turn on the protection in the device. If you have a smart phone fire up the bluetooth discovery and see if you can find their device and pair/connect. If you can you may be able to fool with them.

Keep in mind no matter what avenue you use, if they find out you are screwing with them do not be surprised if they retaliate.

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

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I like Jim's idea too!
If there's no express manual action required on the radio to pair it, it would be pretty funny to have them blast rick astley out their speakers.

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it"

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thygate wrote:
Sounds dangerous and illegal.

Don't all the new car stereo's have IR remotes ? How about a powerful- or focused IR transmitter. That would certainly be less dangerous and probably not illegal either.

GREAT idea! how could I not think about that...All new stereos indeed do have a IR system!

I could buy some universal remote control, and amplify its output...
Of course, it is simple to avoid this kind of device, only by covering the IR receiver...But is woth to try it!
Thanks.

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jgmdesign wrote:
Call the police. In my neck of the world it's illegal to operate an audio system in a vehicle that can be heard from 50 feet no matter what day or night.

YOu might have a problem using a jammer or anything else for that matter as most of the time a radio station is not being played, but an MP3 player or CD is instead.

Now there may be one more thing but it is a long shot. Many mp3 devices also have bluetooth units in them, and the owners of the devices are usually not bright enough to change the passcode(usually 1234 by default) or turn on the protection in the device. If you have a smart phone fire up the bluetooth discovery and see if you can find their device and pair/connect. If you can you may be able to fool with them.

Keep in mind no matter what avenue you use, if they find out you are screwing with them do not be surprised if they retaliate.


-----------------------------------
Police do not work here...(Sao Paulo - Brazil)... At last for that kind of matters...

But it is an interesting idea too!

Indeed I am planning to to that totally unnoticed by the punks... And the fact that Car Stereos nowadays uses only iPod/PenDrive/CD is the worst enemy of RF interference...I would have to transmit too much power to cause minor interference in the inner audio circuits...

Thanks.

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Forget about the destructive measures. It's too dangerous if even possible at all.

I bet reflecting a modulated IR laser beam off of a nearby surface will be able to do some funny stuff.

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it"

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thygate wrote:
Forget about the destructive measures. It's too dangerous if even possible at all.

I bet reflecting a modulated IR laser beam on a nearby surface will be able to do some funny stuff.

In fact, I do not want a destructive device...Only an effective one. If could cause interference in the inner audio systems, the Stereo owner would probably turn it off...

IR control is a simple way to achieve what I want. The thing is: I would have to have some universal IR device, to get any possible Stereo. Without that, would be such a pain to manually implement all kind of IR modulation in the AVR code...

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To get into the audio stages, you would need to exploit audio rectification, where a very strong modulated RF signal is detected in the audio stage and then amplified. You would need some sort of license to generate & radiate enough RF and most licenses would have a restriction on deliberate interference.

Bad idea to do anything! The worry that I would have, is that, should you get anything going that will make life difficult for those audiophiles, what if they find out that it is you and consequently make life very difficult for you and your family. You may just move to the country somewhere!

Charles Darwin, Lord Kelvin & Murphy are always lurking about!
Lee -.-
Riddle me this...How did the serpent move around before the fall?

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They're probably drug dealers, so plant some explosive. Dead drug dealers don't retaliate.the rival gang across town will get the blame thus sparking a feud. Just don't get caught in the crossfire.
Problem solved. Next problem?

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Bluetooth has a range of up to 100m. Cell phones with bluetooth have a range of maybe 20m. Try it!

If they are using an actual radio you could try building a small transmitter whos frequency is your countries IM frequency for FM. Here in the USA it's 10.7mhz. I used to have one when I was at the fiber optics place. All the production workers had personal FM radios and the 10.7mhz went right through the front end stepping on whatever they were listening to. I had a microphone connected to it and some of the reactions were rather amusing when I would announce that lunch was canceled or what have you.

THey are very simple to build....illegal here, but fun ;)

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

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Is the gripe that you dont like the music style they play with 100W amplifiers? (They play salsa and you like Sade?). Go buy a used van. Get a couple buss batteries and a couple of 500W amps and some PA speakers like JBL, EV, Eastern Acoustic Works that are Real Efficient, not these audio woofers that are made nonefficient on purpose in order to handle beaucoup watts. Bungy cord the side doors open. Drive slowly past their crib with the open doors toward the house. If you can get the dB SPL 10dB above theirs, yours will mask theirs out, and they will scowl at you and say "That guy is rude. He's blasting his Sade so loud we can't hear our salsa". What happens at this point could go several directions. "Go get the AKs and the spare clips" or "Sheesh. What a system. Lets take our salsa ipod over there and see how it sounds on his speakers" or perhaps something entirely different. Write back and tell us how it goes.

Imagecraft compiler user

Last Edited: Mon. Mar 4, 2013 - 12:19 PM
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Quote:
IR control is a simple way to achieve what I want. The thing is: I would have to have some universal IR device, to get any possible Stereo. Without that, would be such a pain to manually implement all kind of IR modulation in the AVR code...

Well, sounds like a fun project, no ?

As far as I can tell, most, if not all, IR remote systems use some kind of pulsed modulation. So it should be pretty easy to get a universal remote and replace the IR LED with a transistor to drive an IR laser. Just make sure the laser wavelength matches. Google says ~980-nm wavelength.

You can also drive to your local car stereo dealer and record the IR patterns you want from the demo models. You can also test the Bluetooth connectivity with you cell phone there.

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it"

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thygate wrote:
Quote:
IR control is a simple way to achieve what I want. The thing is: I would have to have some universal IR device, to get any possible Stereo. Without that, would be such a pain to manually implement all kind of IR modulation in the AVR code...

Well, sounds like a fun project, no ?

As far as I can tell, most, if not all, IR remote systems use some kind of pulsed modulation. So it should be pretty easy to get a universal remote and replace the IR LED with a transistor to drive an IR laser. Just make sure the laser wavelength matches. Google says ~980-nm wavelength.

You can also drive to your local car stereo dealer and record the IR patterns you want from the demo models. You can also test the Bluetooth connectivity with you cell phone there.

Indeed is fun. I have played with IR/AT90S/LCD 16x2 some years ago, and that uses modulated pulses...
The major pain would be implement all possible protocols... But is feasible though!

The cost would be a lot lower than implementing RF solutions. I was thinking in some 3W-5W IR LED here and there...What do U think guys?

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Well, what is the distance ? And is it during daytime or nighttime ?

I think it probably won't work for more than a few meters if you don't aim/focus the light. Certainly not outside.

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it"

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Is outside, and usually nighttime...Something about 20-30 meters.
If using IR LEDs, would have to be well centered at noisy car..(low angle led)
If using IR Laser, would be too much directional I think...

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I think reflecting the laser off of a nearby reflecting surface in the car or even on the windows will probably be enough. You certainly don't have to aim it exactly at the IR sensor or even the radio itself.
Aiming it at a car window will probably scatter enough light into the car to trigger the IR sensor.

I give this much more chance than any high power led solution. Don't forget you also need short rise and fall times !

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it"

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Something like this already exists for TV sets - "TV-B-Gone". It is basically a microcontroller with an infrared LED that sends the "power" commands for several brands of TVs, one after the other. https://www.tvbgone.com/cfe_tvbg... This wouldn't work directly on car stereos (unless, say, the "power" command for a Sony car stereo is the same as the "power" command for a Sony TV), but you could build one using the same idea.

I don't know if IR LEDs come in the same packages as RGB LEDs, but you might be able to use something like http://www.bigclive.com/flud.htm to create an IR "flood light". Use a big power transistor to turn the groups of IR LEDs on and off from your microcontroller pin.

Standard disclaimers apply; I don't get money or other consideration from any companies mentioned.

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I would have thought an IR array would be more successful than a laser...

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I think I'd personally go for the laser, but it seems it's hard to find a low power module with a wavelength of ~980nm.

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it"

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Mmmm...both have their own specs...
With a Led Array, de distance would be shorter, but would not need to point..Just some Arrays, say, in my car's windows, would do the job when passing by 'casually' near the noisy source.
With a Laser, it could have to be pointed at car, but would work from far away...

However, I don't know if both of these have the proper rise and fall times needed for burst (around 38kHz).....

Any clue?

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An EMP generator would surely solve the problem.

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I'd go for a paint ball gun. Gets the point across.

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I have found Wagner effective in the past...

I am reminded of a phrase from a traveller's guide to Brazil: "Brazilians are generally polite and courteous, but tend to display a certain enthusiasm for the louder things in life. If you ask them to make less noise, they will do so... but in a very loud manner."

I'm off to Rio tomorrow; let's see if it still holds!

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38 KHz modulation will work for both laser and IR...

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-- or --

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barnacle wrote:
I have found Wagner effective in the past...

I am reminded of a phrase from a traveller's guide to Brazil: "Brazilians are generally polite and courteous, but tend to display a certain enthusiasm for the louder things in life. If you ask them to make less noise, they will do so... but in a very loud manner."

I'm off to Rio tomorrow; let's see if it still holds!

Well...there are 2 kind of brazilian ppl:
1 - Normal/average ppl - Are loud and noisy;
2 - Rio de Janeiro residents - plus master blaster Loud noisy with that damn 'Funk Carioca'.

PS: I am an Alien here... Plz help me , lol.

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chartman wrote:
38 KHz modulation will work for both laser and IR...

By saying 'laser', U mean laser diode, or the full working module alread assembled?

If U mean full module, it would be easy to modulate it!

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RickB wrote:
An EMP generator would surely solve the problem.

Indeed....But those are too expensive to build, I think...

I would not mind using one...But never saw a working schemathic.

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I believe you need about about a two 0.5 Kg. masses of enriched Plutonium initially kept well apart. When you want the EMP, bring the two masses rapidly together rapidly. Some sort of sound activated system below the car should do.
You could use an Arduino to control some stepper motors to do this.
Make sure you are at least 100 KM. away from your home when this occurs. Don't plan to move back home for a while!

Charles Darwin, Lord Kelvin & Murphy are always lurking about!
Lee -.-
Riddle me this...How did the serpent move around before the fall?

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LDEVRIES wrote:
I believe you need about about a two 0.5 Kg. masses of enriched Plutonium initially kept well apart. When you want the EMP, bring the two masses rapidly together rapidly. Some sort of sound activated system below the car should do.
You could use an Arduino to control some stepper motors to do this.
Make sure you are at least 100 KM. away from your home when this occurs. Don't plan to move back home for a while!

Stop the jokes plz...
I am trying to actully build something functional, and if U can not help, don't give us your thoughts at all...

Surprises me that someone as old as U are, has such childish behavior...

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In days of old, you'd just build an enthusiastic oscillator at 465kHz/10.7Mhz and swamp the IF of the radio receiver. Never tried but you might get the same thing at the raw CD bit rate, though that's probably a more robust signal and better shielded.

Quote:
2 - Rio de Janeiro residents - plus master blaster Loud noisy with that damn 'Funk Carioca'.

Also very bad shots.

I was in Rio a few years ago - remember when they were hijacking people on airport buses, and a couple of buses got burned? We were in the flat and heard what we though were the usual Rio fireworks, until we heard the brass hitting the ground. Turned out a local hoodlum had recognised an off-duty policeman and shot at him four times from six feet away... and managed to hit him once, grazing the policeman's foot.

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There's always the Mideast approach involving explosive devices.

If you don't know my whole story, keep your mouth shut.

If you know my whole story, you're an accomplice. Keep your mouth shut. 

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Neil that´s why I don´t like. I had been there once and that´s ok. Who wants to see beatifull places like rio shuld go to Florianopolis, smaller, calmer, awesome.

Jaguar, other freak told about produce some noise sound in a topic that i open, I think is a good solution, but this sound must be direconally to the cars.

Regards,

Bruno Muswieck

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brunomusw wrote:
Neil that´s why I don´t like. I had been there once and that´s ok. Who wants to see beatifull places like rio shuld go to Florianopolis, smaller, calmer, awesome.

Jaguar, other freak told about produce some noise sound in a topic that i open, I think is a good solution, but this sound must be direconally to the cars.

Hi! Indeed I was told that some shift-fased noise would cancel the original noise, but that would need an sound system similar to the original noise sound system...

And that would be, almost always, too big to be as discrete as I want it to be.

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