Every year, with the arrival of summer, sales of various mosquito repellents skyrocket. Sprays, tablets, ointments, fumigators, incense sticks, etc. - there are plenty to choose from. And everything would be fine if not for one “but”. Mosquitoes quickly adapt to any chemical. What 5 years ago drove away all the mosquitoes in a 10-kilometer radius at the dacha is now barely able to protect a small room. Moreover, the windows will have to be closed so that the concentration of the active substance in the air does not drop. But excuse me, do you sleep with the windows closed in the summer? Not the best idea.
It is the ability of mosquitoes to adapt to chemical exposure that has forced scientists to look for new ways to combat them.
They did it pretty well, and the most interesting thing is that nature suggested this method to them. In this article we will talk about three types of squeaks in male mosquitoes, how this relates to the topic of the article, and for dessert we will advise which ultrasonic repeller to choose. Get rid of mosquitoes in your country house
Get rid of mosquitoes in your country house
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Features of the influence of sound
Mosquitoes are representatives of a large family and their numbers are huge.
Each type has not only external features, but also internal ones. This is why different mosquitoes have different degrees of perception of sounds. This explains the fact that for some, ultrasound at 6 kHz is already fatal, while for others it will not even cause slight discomfort. There are different opinions regarding the effectiveness of repelling bloodsuckers using ultrasound. Manufacturers claim that the method works flawlessly and offer new developments of special devices, and scientists are trying to find a reasonable explanation for this. As a result, millions of residents buy various repellers and use them to protect themselves from bloodsuckers.
Ultrasonic mosquito repellers
The main advantages of ultrasonic control:
- Safe for humans. Repellers do not have to be applied to the body, smeared on the skin, or treated with clothing. As a result, the risk of developing allergic reactions and other serious consequences is eliminated.
- Reusable. Special repellers are powered by mains or batteries, so they will work for a very long time. After this, you just need to replace the battery and continue using the device.
- A wide range of. Online stores and retail outlets offer a huge variety of ultrasonic repellers. They can have different dimensions, design and functionality, which makes it possible to choose a device to suit your own taste.
On a note!
You can also make your own mosquito repeller. This will require a minimum of skills, a user manual and a small supply of materials that can be found in the house or will cost a penny.
Among the shortcomings are noted:
- High price. Ultrasonic mosquito repellers are more expensive than the usual cream or spray.
- Questionable effectiveness. There is no clear opinion regarding the effectiveness of this method of protection. Scientists have not been able to 100% confirm this fact. Also, the degree of efficiency depends on the ability to choose the right frequency.
Ultrasonic devices are also on sale, which have several operating programs and are capable of repelling not only insects, but also small rodents.
Circuit example
Physicists can make a device that produces sound of a certain frequency. But using their drawings, it will be possible to make an effective device within an hour.
The electronic circuits of the ultrasonic repeller show the chain along which the components of the device should be connected.
The designations on the chip mean the following:
- R1-R5 – DC resistors with a power of 0.25 W;
- VD1 – diode to protect the device from short circuit or incorrect connection;
- BQ1 – emitter producing ultra-frequency sound;
- VT1-VT2 – bipolar transistors;
- R6 – variable resistor;
- C1-C2 – capacitors;
- S1 – toggle switch for turning on and off.
All components of the drawing are located on a printed circuit board; you will need batteries or rechargeable batteries for outdoor use. Power supply with voltage up to 12 V.
You can adjust the sound frequency using variable resistor R6. A homemade repeller is used indoors or outdoors.
You can use the K555LA3 microcircuit with good frequency characteristics and low electrical energy consumption. There are only 4 parts in the diagram.
The designations are similar. Assembled on a breadboard. The signal is generated by capacitor C1; if it needs to be changed, it is regulated using a variable resistor R6. An ultrasonic repeller can be made in a few hours with minimal knowledge of physics.
If someone is interested in whether it will work or not, you can spend a few hours of your free time making an ultrasonic repeller. But, it is much easier to buy a ready-made device at an affordable price with similar, or even better, action.
When warm days arrive, it's not only good for sunbathing lovers, but also for pesky mosquitoes, which are considered one of the oldest insect species on the planet. Their distant relatives were five centimeters long and did not give peace to the dinosaurs themselves.
Mosquitoes cannot tolerate temperature changes: they hide in frost and extreme heat. The most comfortable temperature for them is +15… +22 degrees. At this time, they become active and annoy people.
It is also known that mosquitoes do not rise high into the air, but fly above the ground. Therefore, residents of apartments located on the lower floors of residential buildings often need means of protection against these annoying insects, including a mobile ultrasonic mosquito repeller.
Types of repellers
Mosquito repellers
A device that will make a sound against mosquitoes may have the following variations:
- For use at home. These are small boxes that need to be plugged into an outlet.
- For use outdoors. The repellers will emit ultrasound and operate on batteries.
- Portable. Devices in the form of bracelets, keychains and other small accessories that are easy to always carry with you.
On a note!
A wide range will allow you to use mosquito repellent sound at home, outdoors and while traveling.
What sounds will repel mosquitoes?
Many studies have been conducted to determine what frequency of sound is needed to repel mosquitoes. But all of them not only failed to identify the necessary values, but also cast doubt on all arguments that ultrasound can help in the fight against insects. The minimum value is 4 kHz, but even this may not apply equally to different fauna.
Employees of one radio station also suggested using ultrasound against mosquitoes. In addition to the musical composition, they included ultrasound. Most adults' hearing aids couldn't pick it up, but the bloodsuckers had to stay away. Music against mosquitoes was supposed to give residents the opportunity to relax quietly in nature or do gardening without annoying midges.
Mosquito repellent sounds
Interesting!
The world-famous home appliance company LG has released a whole series of air conditioners that contain a device for repelling mosquitoes using ultrasound.
The opinion that mosquitoes are afraid of ultrasound has often been used for selfish purposes by many entrepreneurs. Some offered mobile phone users to download a special ringtone, the range of which was supposed to scare away bloodsuckers.
Some developers offered to purchase devices that imitate the sounds of a dragonfly. It is these insects that are one of the worst enemies of bloodsuckers. A dragonfly can eat an almost unlimited number of mosquitoes, which is why they will try to avoid it. But it has been scientifically proven that the sound of dragonfly wings is in the range of 20-170 Hz, which is significantly lower than what the device suggests.
The development of Soviet scientists was especially popular. This is a special multivibrator equipped with a frequency selection function. Thus, users could set a mosquito-killing sound depending on their region of residence.
Interesting!
Mosquitoes have many natural enemies, and some developers have decided to use the croaking sound of frogs to recreate a frightening sound.
Thus, scientists could not find one hundred percent confirmation that buzzing, beeping, croaking or any other sound at any frequency can help fight mosquitoes. It turned out to be even more difficult to find the very range of required sound vibrations. Therefore, to combat bloodsuckers, it is better to use proven and effective mosquito repellents.
Ultrasound against mosquitoes
In their life activities, blood-sucking creatures are guided by a keen sense of smell and ultrasound. Insects detect infrared rays, the smell of carbon dioxide, lactic acid, and sweat. They are able to determine the location of a potential victim from a distance of several tens of meters.
The sound from mosquitoes, according to manufacturers, is of a certain frequency. The human ear cannot detect it, but insects hear well. What frequency it should be, studies were carried out, as a result of which a value of 4 kHz - 6 kHz was revealed.
On a note!
Manufacturers claim that the mosquito-repellent sound imitates the flight of a dragonfly. However, the predator, by flapping its wings, creates ultrasound at a frequency of 20 kHz, which contradicts the information indicated on the device. If mosquitoes heard the approach of a dragonfly so clearly, they would not become victims of a predator and would have time to move to a safe distance.
Does ultrasound against mosquitoes help in the fight against insects? :
Probably everyone has encountered the annoying buzzing of insects and mosquito bites. If you can protect yourself at home with the help of fumigators and plates, then in nature it is more difficult to do this.
Sprays, lotions, and spirals contain chemicals that are undesirable for use in areas where there are children or pregnant women. In principle, they are not so harmless for everyone. Recently, they have begun to actively offer ultrasound against mosquitoes.
How does ultrasound work?
Ultrasound against mosquitoes works quite simply - it releases waves of a certain frequency that humans cannot hear. But insects actively react to them.
Human eardrums have a complex structure, so they do not vibrate as actively as those of mosquitoes, bats, and flies.
The latter catch frequencies using not only their ears, but also their antennae, villi on their paws, and genitals.
Ultrasound for mosquitoes does not kill insects, it only repels them, driving them to a safe distance. This device was known 30 years ago, but began to be actively used only now.
Advertising videos and posters can be found on the Internet. Reviews vary: some claim that there is no better means of protection, while others take the position that ultrasound is absolutely useless. Such devices cost from 1000 to 5000 rubles.
It all depends on what type of device you will purchase.
What does the insect hear?
Many people ask why ultrasound is effective against mosquitoes? What sounds cause insects to fly to a safe distance? To answer this question, you need to know the following facts. Scientists have proven that only female mosquitoes bite people, and this happens immediately after mating with a male and fertilization.
Moyu Potable Mosquito Bite Relief Pen
Another Xiaomi partner’s gadget relieves itching and redness from mosquito, wasp or bee bites. Using heat pulses, the Moyu device destroys mosquito saliva or other insect venom injected into the skin, preventing an allergic reaction. For greater effectiveness, it is recommended to immediately treat the bite site, but even with a delay of several hours, the itching goes away almost instantly. The procedure itself lasts 10 seconds.
During operation of the device, the temperature of the ceramic pad on the tip ranges from 30 to 49 degrees Celsius - there is no need to be afraid of burns. Moyu Potable Mosquito Bite Relief Pen is suitable for adults and children aged four years and above. And don't forget to buy two AA batteries (usually included, but due to the requirements of the logistics company, the seller had to remove them from the box).
For those who want to know more:
- 10 Best Selling Gadgets on AliExpress
- New Chinese brands: Baseus - chargers, cables and headphones
- 10 Xiaomi MiJia smart home gadgets you didn't know about
- Xiaomi ecosystem: 10 best YI gadgets for all types of video shooting
A variety of ultrasonic repellers
Anti-mosquito sound is produced by special devices powered by batteries, electric current, or rechargeable batteries. The devices are made in the form of a small box, somewhat reminiscent of a radio. In the room, plug it into a power outlet and press the start button.
The range of portable devices that produce a killer sound is much wider - key rings, pendants, watches. The radius of influence is from 50 cm to 3 m. To start working, you must press the start button. The warranty period for the frightening device is 12 months. The batteries are changed periodically or left to recharge.
Interesting!
A unique achievement is mosquito repellent music. In the process of sounding the melody, ultrasonic frequencies are used. A person does not feel them, but mosquitoes fly away in different directions. Options are offered for mobile phones, smartphones, and players. You can calmly enjoy your time in nature with mosquito-free music and without putting in much effort.
Is ultrasound dangerous for humans?
Ultrasound in the dose supplied by animal and insect repellers is absolutely safe for humans. The human ear is simply not capable of perceiving or hearing it. We usually hear sound with a frequency ranging from 16 to 20 kHz, but ultrasonic waves are above our threshold of sensitivity. The vibration level of ultrasonic waves is usually almost 70 kHz.
Also, in addition to frequency, sound is measured in decibels. The human body is able to calmly perceive pressure up to 120 dB. While many repellers are rated at 100 dB, so they do not have a dangerous effect on the human body.
Review of ultrasonic indoor repellers
Before purchasing a high-quality device for exterminating all unpleasant insects from the house, it is worth considering the main features of repellers for the home. This will help you purchase a quality product that is suitable for the whole family.
Home appliances are safe products that can be used by the whole family. Their operation is carried out from the electrical network, so they can be installed in any room - in the bedroom, living room, kitchen.
Stationary repellers for the home include the following models:
- AR-115. This is a Chinese-made device. Its production involved the use of ultrasonic radiation technology, which has an irritating effect on mosquitoes. In addition, during operation, this device makes a sound similar to the buzzing of dragonflies, which are the ardent enemies of mosquitoes. The repeller is equipped with an indicator that reflects the operation. Power is supplied via an electrical network with a power of 220 V. The distribution area is up to 50 meters.
- Ultimate 5 in 1. This is a new product among devices that are used to repel insects. The repelling process is based on the use of magnetic resonance, ion and ultrasound technology. Additionally, it comes with a night light. Power is supplied via an electrical network.
- Tornado OK-01. The working process mechanism is based on the use of a buzzing sound, which imitates the sound of male mosquitoes. Usually, fertilized females, hearing this sound, try to fly away from the source. It is not felt by humans and domestic animals. If desired, you can adjust the sound yourself.
What you should know
When assembling a device of this type, you should not expect that you will be able to get rid of rodents as soon as the device is connected and starts working.
In kitchens and pantries, where there is something for small pests to profit from, it is worth installing appliances that are more powerful than in other rooms. In such premises, the fight against mice and rats can take even two months. Where there is no food available, the process will go much faster and will take about two weeks.
To combat rodents in unheated basements and storerooms, you need to assemble a device using radio components that can function at subzero temperatures.
Pets can sense some of the frequencies emitted by the repeller. In this case, they feel anxious. In order for pets to stop feeling the effects of ultrasound, it is necessary to change the frequency of vibrations emitted by the device. If such actions do not lead to the desired result, you will have to purchase a factory-made one. True, many devices from domestic manufacturers also operate at frequencies audible by pets, but there are models from foreign brands that do not affect animals.
Each device is capable of protecting a certain area of the room based on its rated power. However, mathematical calculations made using formulas attached to the diagrams may result in an indicator that does not take into account the load of the room with furniture or other obstacles that reflect ultrasound. Therefore, it is necessary to make an adjustment, taking into account the characteristics of the room where the device will operate.
After studying the reviews of people who have already used purchased and homemade devices, you can decide on your choice. Of course, you can make such a device with your own hands using circuit diagrams and necessary elements from a radio store, but this requires certain knowledge.
The penetration of mice and rats into the house becomes a big problem for its inhabitants. Rodents not only spoil food, things and furniture, rats and... There are many ways to combat gnawing pests, ranging from chemicals and ending with folk recipes. An excellent alternative to all these methods can be one, which works by emitting high-frequency sound waves. Among the popular brands, devices stand out. Considering the rather high cost of the device, many craftsmen have learned to assemble an ultrasonic rat and mouse repeller with their own hands.
Review of ultrasonic outdoor repellers
Sometimes when traveling to nature or to the country, it becomes necessary to use various means to eliminate blood-sucking insects. Probably many people know how many of these creatures fly outside in the summer, especially in places near water bodies. In this case, an outdoor mosquito repeller will come in handy. Typically these devices are powered by special batteries.
Popular outdoor repellers include the following models:
- Weitech WK0029. This device is made in Belgium. It has a compact size, so you can easily take it with you on the road. The device body is convenient for installation in a tent or outdoors. This is an electronic device. It is possible to adjust the intensity of ultrasonic radiation.
- Protector Freetime. This is a universal device. It can be used at home, for the street, or simply attach a mosquito repeller to your belt. Thanks to its compact size, you can take it with you to the countryside or to the countryside. The area of distribution outdoors is up to 1.5 meters, indoors up to 30 meters.
- Mosquito repeller Cosmos. This device has low power. The radius of wave propagation is only 3-5 meters, no more. It produces a floating sound wave. Can work in three time modes - 4,4 and 8 hours. When working, it imitates the buzzing of a dragonfly.
Criterias of choice
When deciding which device to buy, you should determine the purpose of its use.
Stationary models that require a constant connection to the network are suitable for the home; mobile and compact devices that do not take up much space are suitable for the street. You should first study customer reviews. Some devices don't live up to the promises their manufacturers make.
Attention! There are a lot of fakes on the market - you need to buy devices only from trusted suppliers who have proven themselves on the positive side
Therma CELL
Outdoor repellent lamp. At the same time it is a good night light. It is based on the principle of fumigation - the device heats up and evaporates a repellent that drives away insects. It does not smell and does not harm people.
Characteristics:
- coverage area - 20 m²;
- brightness - 220 Lum;
- works thanks to a butane cartridge;
- requires replacement of consumables - gas cartridges and plates with repellent;
- Safe for children, allergy sufferers and pets.
Price - from 1400 rub.*
Therma CELL
Protector Freetime
The personal protective equipment is made in the form of a bracelet. Emits ultrasound. An excellent option for fans of tourism or country holidays.
Peculiarities:
- made of hypoallergenic materials;
- automatically turns off after 8 hours of continuous operation;
- range of action - up to 1.5 m;
- 4 operating modes.
Cost - from 2000 rubles.
Protector Freetime
Rexant 71-0014
Ultrasound device intended for home use. Requires connection to an electrical network. The affected area is 30 m². It has 2 radiation modes, which eliminates the adaptation of insects. Price - from 250 rub.
Rexant 71-0021
Portable ultrasonic keychain. Repels mosquitoes by imitating the squeak of a dragonfly, their natural enemy. Protects against insects within a radius of three meters. Has 3 operating time modes: 2, 4 and 8 hours. Cost - from 250 rubles.
Sources
- https://apest.ru/komary/sredstva-ot-komarov/otpugivatel-komarov-svoimi-rukami/
- https://belt-wrestling.su/muhi-i-moshki/otpugivatel-komarov-svoimi-rukami-2.html
- https://www.otpugiwateli.ru/otpugivatel-komarov-svoimi-rukami.php
- https://notklop.ru/komary/sredstva-ot-komarov/otpugivatel-komarov-svoimi-rukami/
- https://bezbukashek.ru/tarakany/ultrazvukovoj-otpugivatel-tarakanov-princip-raboty-shema-sborki-pribora
- https://belt-wrestling.su/ru/antiboping/2016/dec/29/257/
- https://stopklopu.com/ultrazvukovoj-otpugivatel-komarov-svoimi-rukami/
Review of portable ultrasonic repellers
Portable devices can be found on sale. They are usually produced in the form of bracelets and keychains.
Popular models include the following devices:
- Keychain "Typhoon LS-100". The ultrasonic mosquito repellent keychain is a convenient device that can be carried in your pocket or on your belt. It is possible to adjust the sound from low to high levels. Distribution area up to 80 square meters. This device can be powered by batteries or from a 220 V electrical network.
- Bracelet "Komarin-Light". The ultrasonic mosquito repellent bracelet is small in size, so it is convenient to carry with you. Distribution radius up to 8 square meters. If desired, the device can be attached to a belt. The work is carried out using special batteries. At home, the work process can be carried out using an electrical network with a power of 220 V.
Fighting mosquitoes is a rather complex process that takes a lot of effort. The use of ultrasonic repellers will make this matter much easier. The main thing is to choose the right device that can completely remove all these unpleasant parasites. In addition, some models will help make outdoor recreation comfortable and carefree.
AO-150
The ultrasonic repeller AO-150 will help drive flies and mosquitoes out of your apartment. The operating area of the device, which is harmless to humans, is 40 square meters. m. Simply plug it into the network, and after 15-30 minutes the buzzing of annoying insects will stop.
When the device is turned on, two indicators light up: a red light indicates the connection of the power supply, a green light signals the start of operation of the device.
The device has small dimensions (15x15 cm) and weight (160 g), is powered from the mains (220 V), has a power of 8 W and a wave frequency of 22-55 kHz. The cost of the AO-150 repeller is about 500 rubles.
