Infrasonic emitter for noisy neighbors. Do-it-yourself ultrasonic gun DIY low-frequency mechanical emitter

The ultrasonic gun is self-assembled on only two logical inverters and has a minimum number of components. Despite the ease of assembly, the design is quite powerful and can be used against drunk drunks, dogs or teenagers who sit up and sing in other people's porches.

Diagram of an ultrasonic gun

Chips CD4049 (HEF4049), CD4069, or domestic chips K561LN2, K176PU1, K176PU3, K561PU4 or any other standard logic chips with 6 or 4 logical inverters are suitable for the generator, but you have to change the pinout.

Our ultrasonic gun circuit is based on the HEF4049 chip. As already mentioned, we need to use only two logical inverters, and which of the six inverters to use is up to you.

The signal from the output of the last logic is amplified by transistors. To build up the last (power) transistor, in my case, two low-power KT315 transistors were used, but the choice is huge, you can put any NPN transistors of low and medium power.

The choice of a power switch is also not critical, you can install transistors from the KT815, KT817, KT819, KT805, KT829 series - the latter is composite and will work without an additional amplifier on low-power transistors. In order to increase the output power, powerful composite transistors such as KT827 can be used - but an additional amplifier will still be needed to build it up.

As a radiator, you can use any MF and HF heads with a power of 3-20 watts, you can also use piezo emitters from sirens (as in my case).

By selecting the capacitor and the resistance of the tuning resistor, the frequency is adjusted.

Such a self-assembled ultrasonic gun is quite suitable for protecting a summer cottage or a private house. But do not forget - the ultrasonic range is dangerous! We cannot hear it, but the body feels it. The fact is that the ears receive a signal, but the brain is not able to decode it, hence the reaction of our body.

Collect, test, rejoice - but be extremely careful, and I say goodbye to you, but not for long - AKA KASYAN.

It is better to use an infrasound emitter, no noise, but an effect ... but you can pay for it yourself ... so I will not describe any schemes. I'll give you food for thought. I used such a thing in the garage, rats and mice, five minutes after turning on, ran away one after another along the road, so that even passers-by shied away from the sides.
Therefore, people do not annoy your neighbors, but also watch the sounds in your apartments. Infrasound is very dangerous. If for no reason at all in your apartment objects begin to move by themselves, there is something to think about ...
The origin of infrasound is very diverse.
Oscillations in which the sound frequency is less than 16 (17) Hz are called infrasound. Perfectly propagating in the water, infrasounds help whales and other marine animals to navigate in the water column. Hundreds of kilometers are not a hindrance for infrasound.

The effect of infrasound on a person is peculiar. Infrasound with a frequency of 8 Hz, which is half the lower limit of hearing in height, comes close to the so-called alpha rhythm of the human brain (5–7 Hz) and causes people to feel fear and panic. In general, these frequencies are dangerous for humans.

Infrasound can instill in a person such feelings as melancholy, panic fear, a feeling of cold, anxiety, trembling in the spine. People exposed to infrasound experience approximately the same sensations as when visiting places where ghosts have been encountered. Getting into resonance with human biorhythms, infrasound of particularly high intensity can cause instant death.
Low-frequency sound vibrations can be the cause of the appearance of a rapidly emerging and also rapidly disappearing thick ("like milk") fog over the ocean.
Some explain the phenomenon of the Bermuda Triangle precisely by infrasound, which is generated by large waves - people start to panic, become unbalanced (they can kill each other)
Infrasound can "shift" the tuning frequencies of internal organs.
Infrasonic oscillations with a frequency of 8 - 13 Hz propagate well in water and appear 10 - 15 hours before a storm.
Resonance frequencies of the human internal organs:
Frequency, Hz Organ
20 - 30 - Head
19, 40 - 100 - Eyes
0.5 - 13 - Vestibular apparatus
1 - 2 - Heart
2 - 3 - Stomach
2 - 4 - Intestine
4 - 8 - Abdomen
6 - 8 - Kidneys
2 - 5 - Hands
6 - Spine
When the frequencies of the internal organs and infrasound coincide, the corresponding organs begin to vibrate, which can be accompanied by severe pain.
Bioefficiency for humans of frequencies 0.05 - 0.06, 0.1 - 0.3, 80 and 300 Hz is explained by the resonance of the circulatory system, and frequencies 0.02 - 0.2, 1 - 1.6, 20 Hz - by the resonance of the heart . The sets of biologically active frequencies do not match in different animals. For example, the resonant frequencies of the heart for a human give 20 Hz, for a horse - 10 Hz, and for a rabbit and rats - 45 Hz.
"Voice of the Sea" - these are infrasonic waves that arise above the sea surface during a strong wind, as a result of vortex formation behind the wave crests. Infrasound with a frequency of 7 Hz is fatal to humans.
Significant psychotronic effects are most pronounced at a frequency of 7 Hz, consonant with the alpha rhythm of the natural oscillations of the brain, and any mental work in this case becomes impossible, since it seems that the head is about to break into small pieces. Infra frequencies of about 12 Hz at a strength of 85-110 dB induce seasickness and dizziness, and oscillations with a frequency of 15-18 Hz at the same intensity inspire feelings of anxiety, uncertainty and, finally, panic fear.
With sufficient intensity, auditory perception also occurs at frequencies of a few hertz. At present, its emission region extends down to about 0.001 Hz. Thus, the range of infrasonic frequencies covers about 15 octaves.
If the rhythm is a multiple of one and a half beats per second and is accompanied by a powerful pressure of infrasonic frequencies, then it can cause ecstasy in a person. With a rhythm equal to two beats per second, and at the same frequencies, the listener falls into a dance trance, which is similar to a drug one.
When a person is exposed to infrasound with frequencies close to 6 Hz, the patterns created by the left and right eyes may differ from each other,<ломаться>horizon, there will be problems with orientation in space, inexplicable anxiety, fear will come. Similar sensations are also caused by light pulsations at frequencies of 4-8 Hz. Infrasound can affect not only vision, but also the psyche, and also move the hairs on the skin, creating a feeling of cold.

In short, the neighbors began to make noise, at that moment you turn on the emitter (no more than 30 seconds, otherwise the roof will be blown off), they will definitely quiet down, as the noise starts to repeat, do the same thing again and so on ... until they calm down ( Most importantly, don't overdo it. In general, you develop in them a sense of fear of noise, over time (two or three days) they will become quieter than mice and will themselves shy away from any loud sound.
The reflex is produced on a subconscious level.

Frequency 6 Hz (causes a feeling of fear), strength 110 dB, waveform "noise"

New on your site. I also have pain. Above me and my wife settled two girls, of a prostitute kind,
I can not understand what they do in life - they get up at 13 - 17 o'clock (there is a clatter and an alarm clock), and then house-style swotting begins, sometimes for 7 hours in a row! Go to bed at 10 am! ... I can not understand.
We wrote a note with my wife, it didn’t help, we went to them three times, they say we just want to talk, without blood - they just look through the peephole, do it quietly and after half an hour everything is the same.
He pounded on the ceiling with a sledgehammer and on the batteries, but this only embitters them and they make it louder and stomp their feet in revenge ...
I can’t understand such people ... I myself was once reproached by a neighbor (long before the girls appeared) for a loud booze, I felt so ashamed that I violate the comfort of other people, their right to sleep ... but for some reason these don’t understand.
Then he hid. Injected eggs into the upholstery. Eggs did not help - there was no stench. Cracked an egg into a glass and started watching it and sniffing it every day. It just evaporates!! There is less and less of it in the glass, but there is no stink! Xs how to make it rotten, then to drive it into a syringe. While armed with another syringe with fish sauce / fat, egg and ammonia. I keep him warm and in the light. There is some air in the syringe for any decomposition reactions.
And now about the sound.
Generated seven sounds in Sound Forge, each several hours long.
Several sounds with frequencies of 20 - 40 Hz with filters and amplitude modulation of 5-7 Hz.
Several high-frequency 20-21 kHz with filters.
One sound where one channel is low pulsating frequencies, and the second channel is a high-frequency squeak.

These sounds do not have a super effect and so on, but they can spoil the mood greatly (as soon as the wife heard a squeak, her eyes popped into her forehead). When pressed against the ceiling (or better, at the junction of a non-load-bearing wall and ceiling, in the conditions of morning and afternoon silence, they will have a certain resonance and reach the addressee. The main thing is to start it VERY LOUD! Another advantage is that it is impossible to understand where the sound comes from. Arranged a test. Waited when the girls leave from above, then he pushed everything up to the ceiling, turned it on to the fullest, closed the doors in the rooms, went out to the stairwell and began to listen. I listen to my door - it seems from there. I listen to the neighbor's door to the right - or maybe from there. I turn my head - or maybe from the elevator...
All buildings and apartments are different, I can not vouch that everyone would have the same.
Now this case is at the ready, I'm waiting for a reason, so to speak, to run into according to the concepts, and not according to lawlessness. They have not made any noise for 4 days. As soon as, so to a rhinestone, from 7.00 and for the whole day.

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Ultrasound to scare teenagers tested in Japan

An experiment to scare away juvenile bullies using a device that emits an extremely unpleasant sound that only teenagers can hear was carried out on Thursday in a park in Tokyo's Adachi district. According to RIA Novosti with reference to the Japanese media, residents of houses adjacent to the park have long complained about the noise and hooligan behavior of teenagers who have chosen the park for night gatherings.

These complaints, as well as constant damage from vandalism in the toilets, forced the district administration to conduct a scientific experiment.

Experience has shown that people between 30 and 50 years of age cannot distinguish high-pitched sounds that remind them of the noise in a train car. At the same time, the students covered their ears and tried to move away from the source of the sound as quickly as possible.

“A terribly unpleasant sound. As if someone is scratching a blackboard with a fingernail,” a 15-year-old student shared his feelings.

“The sound cannot be endured for a long time,” the 12-year-old schoolgirl echoed him.

Three years ago, "sound inaudible to adults" became available for download on cell phones in Japan. According to one company that sells sound to cell phone users, in just one year it was downloaded to mobile phones more than 110,000 times.

For the protection of public order, an apparatus using "anti-teenage" sound is used in Japan for the first time. In the UK, we recall that the local developers of a unique source of disturbing ultrasonic interference last year began production of the second model of such a device - called Mosquito GSM. The first model appeared there a year earlier.

Buyers of devices are not only police units, but also representatives of transport companies, shops, banks and municipal authorities. All of them are interested in keeping socially dangerous youth away from crowded places and important urban infrastructure facilities.

Such a device costs about a thousand dollars and has a range of 15 to 20 meters. These new products do not pose any danger, says Compound Security Systems (CSS), a manufacturer based in Merthyr Tydfil, Wales.

It is enough to start using Mosquito, and the profit of the outlet will certainly increase, and theft will decrease, says CSS commercial director Simon Morris. In one of the firms, he was told that thanks to the new development, their profit in the first week alone increased by 6 thousand dollars.

One of the new devices is used by the Mark&Spencer store. Arriva trains, Northern Rail and Chiltern Railways also invested in Mosquito, along with several police departments, including those in London.

Distributors of the novelty from the company JNE Marketing say they have already opened representative offices for consultations on the use of Mosquito throughout the country.

vlad1

Guest

Dear admin, I tried to make the woofer diaphragm heavier, though not in your circuit, but simply by connecting it to the woofer output, the speaker wheezes, creaks, a lot of harmonics and distortions, but OUT does not work. Perhaps it is necessary to use some special speakers or piezoelectric radiators, if so, what brand, tell me.
And yet, is it possible to insert a microphone into the circuit instead of a relay as a sound source? The fact is that with a relay this is a one-time action, and by inserting a microphone, you can carry out a suggestion on the subconscious and not get up 2-3 times a night, do not put the device out the window in bad weather, rain and snow, but give instructions to drunks not to return to our yard and tell all the bruised people I know not to come here.
Vlad.

The lower the sound frequency, the more internal volume is needed for the case in which the speaker is installed.
The dimensions of the diffuser should also be small. In his youth, columns 100-AS-001 were produced in the Soviet Union.
There, along the "bottom" were speakers with a metal diffuser, mugs with a diameter of more than 50 cm. Infrasound could be obtained from them. Infrasound cannot be focused, it spreads in all directions. Remember the subwoofer from the home theater system, you can’t put it anywhere in the room, it hums everywhere. There is a section in physics, acoustics is called, I recommend reading it.

Infrasound cannot be focused, it spreads in all directions.

It does not have to be focused, it is enough to create it at a certain point. For example, two intersecting beams of ultrasound. They are focusing. Apply two ultrasonic phasing arrays, the radiation of which differs by the frequency of the required infrasound. Direct them at an acute angle, to a certain intersection point. At the intersection point, due to interference, we get infrasonic beats. The method, quite often, is found on the Web, and not only for ultrasound.

banana

Guest

Repeller of drunks (carefully infrasound!)

I have a playground under my window in the yard. During the day, the kids are busy in the sandbox, and in the evenings, the area was occupied by young alkonauts. Until late at night they drink, yell, swear - they interfere with people's sleep. Tired, I decided to disperse, - the author writes.
Houses on the mezzanine were littered with two old self-made columns. He took out a low-frequency speaker from one, found a circuit in the old gas sockets, which he used to set up phase inverters in the speakers, and in a day assembled a simple infrasound emitter tuned to the “frequency of fear” in a case from a plastic bucket.
In the evening, I hung the structure out the window and turned on the power. Five minutes later, she licked the drunkard like a cow with her tongue.
Now, as the noise rises, I turn on the scarecrow for a couple of minutes. In the yard - silence, smoothness and God's grace. And since the whole structure is a mouthpiece, it “blows” only into the yard, and not into the house. My dog doesn't even howl.
Operating principle. The circuit is a self-oscillating oscillator operating at the natural resonance frequency of the loudspeaker suspension system. Since the resonant frequency of the woofer is 40-100 Hz, in order to reduce it, you just need to make the suspension system heavier. To do this, in the center of the diffuser, it is necessary to glue a solder spiral weighing about 20 - 40 grams, then the resonant frequency decreases to 6-15 Hz. It all depends on the brand of the speaker, look at the parameters in the internet.
Design. The circuit diagram is the simplest self-oscillating generator that starts from the speaker coil, I assembled it back in the fifth grade when I was making speakers. Relay RES 9 at 5V, delayed by capacitor C1. Actually, this relay is needed to “push” the speaker and turn off, then the circuit works on the resonance of the speaker coil. Transistors - any low-frequency medium power, always on radiators (I took two bottoms from aluminum cans from Cola). Power - bepeshnik 9V from a dead modem. Resistors R1, R4 - volume control - the circuit operates on a pendulum resonance, and although the electrician consumes about two watts, the output is at least twenty, and the speaker is peddling without them. Speaker - in principle, any low frequency, I have an ancient 10 GD-34 at 10 W, with a 4 Ohm coil, the resonant frequency of the suspension is 80 Hz. Be sure to install in the case to avoid acoustic "short circuit". The case is a children's plastic bucket. At the speaker, I sawed off the ears with an electric jigsaw, stuck it in a bucket and glued “Moment” around the perimeter.
Tuning - BE CAREFUL INFRASOUND!!! First you need to assemble the system on the table and check the electrics, at first without a weighting agent, when you turn on the power, the speaker should buzz at the resonance frequency. I earned half a kick. If it does not work out, play around with the capacitance of the capacitor. Then assemble the device in a bucket, mold the gaps between the speaker and the bucket with “Moment”, and coat the weighting spiral with “Moment” and glue it to the speaker cone on “Moment”. Since I could not find a normal frequency meter, I set up the “fear frequency” of 13 Hz with an oscilloscope and a low-frequency generator according to the Lissajous figure. To do this, I applied 26 Hz from the generator to one input of the oscilloscope, and the wires from the speaker to the other. Then, in order not to get under the infrasound, I covered the bucket, turned on the power for five seconds and looked what happened. Then he turned off the power and began to trim the weighting coil a little bit, until he got a double Lissajous. That's all. I don’t post a photo - a bucket is a bucket.

A simple repeller of yard alcoholics.

I have a playground under my window in the yard. During the day, the kids are busy in the sandbox, and in the evenings, the area was occupied by young alkonauts. Until late at night they drink beer, break outrages, talk obscenely - they interfere with people's sleep. Tired, I decided to disperse.

Houses on the mezzanine were littered with two old self-made columns. He took out a low-frequency speaker from one, found a circuit in the old gas sockets, which he used to set up phase inverters in the speakers, and in a day assembled a simple infrasound emitter tuned to the “frequency of fear” in a case from a plastic bucket.

In the evening, I hung the structure out the window and turned on the power. Five minutes later, she licked the drunkard like a cow with her tongue.

Now, as the noise rises, I turn on the scarecrow for a couple of minutes. In the yard - silence, smooth surface and God's grace. And since the whole structure is a mouthpiece, it "blows" only into the yard, and not into the house. My dog doesn't even howl.

Operating principle. The circuit is a self-oscillating oscillator operating at the natural resonance frequency of the loudspeaker suspension system. Since the resonant frequency of the woofer is 40-100 Hz, in order to reduce it, you just need to make the suspension system heavier. To do this, in the center of the diffuser, it is necessary to glue a solder spiral weighing about 20 - 40 grams, then the resonant frequency decreases to 6-15 Hz. It all depends on the brand of the speaker, look at the parameters in the internet. Design. The circuit diagram is the simplest self-oscillating generator that starts from the speaker coil, I assembled it back in the fifth grade when I was making speakers. Relay RES 9 at 5V, delayed by capacitor C1. Actually, this relay is needed to “push” the speaker and turn off, then the circuit works on the resonance of the speaker coil. Transistors - any low-frequency medium power, always on radiators (I took two bottoms from aluminum cans from Cola). Power - bepeshnik on 9V from a dead modem. Resistors R1, R4 - volume control - the circuit operates on pendulum resonance, and although the electrics consume about two watts, the output is at least twenty, and the speaker is peddling without them. The speaker - in principle, any low frequency, I have an ancient 10 GD-34 at 10 W, with a 4 Ohm coil, the resonant frequency of the suspension is 80 Hz. Be sure to install in the case to avoid acoustic "short circuit". The case - a children's plastic bucket. At the speaker, I sawed off the ears with an electric jigsaw, stuck it in a bucket and glued Moment around the perimeter. Tuning - BE CAREFUL INFRASTRUCTURE!!! First you need to assemble the system on the table and check the electrics, at first without a weighting agent, when you turn on the power, the speaker should buzz at the resonance frequency. I have earned from half a pint. If it doesn't work out, play around with the capacitance of the capacitor. Then assemble the device in a bucket, glue the gap between the speaker and the bucket with Moment, and coat the weighting coil with Moment and glue it to the speaker cone for Moment. Since I could not find a normal frequency meter, I set up the “fear frequency” of 13 Hz with an oscilloscope and a low-frequency generator according to the Lissajous figure. To do this, I applied 26 Hz from the generator to one input of the oscilloscope, and the wires from the speaker to the other. Then, in order not to get under the infrasound, I covered the bucket, turned on the power for five seconds and looked what happened. Then he turned off the power and began to trim the weighting coil a little bit, until he got a double Lissajous. That's all. I don’t post a photo - a bucket is a bucket.

Reviews (6)

Conclusion:
- a circuit with a self-oscillating bridge is not viable due to the very low power in dynamics and, at the same time, the large release of this power in the ballast.
- it was not possible to achieve a noticeable reduction in the resonant frequency by weighting, even without closing the speaker in a box. Even more so in a closed box, this is what acoustic theory teaches.
- As a next step, you can try the speaker switching circuit with an independent master subsonic frequency generator.

Guys, everything is simple, you just have to look at the old literature. Wood, when did you make your pipe? In 1929. When did the modulation take place? In 1902. And in general, read about sound, sound vibrations. For each type of vibration, its own design. For infrasonic vibrations, deal with organ pipes, deal with Tesla's works with torsion ones. And in general, in life everything is simple there, all this can be done at home and all sorts of different designs. As Wood and Tesla did in their time from practically nothing.

I read your article. I am delighted!! Can you send a schematic and a detailed description - these alcoholics have already "gotten" ... Maybe, under good circumstances, they can arrange such "scarecrows" for garden houses - and the thieves in the gardens (and not me alone) have already tired .. but an effective way against they haven't been invented yet.

Owner response

The scheme is in the gallery

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