Can an ultrasound person hear it? Today s next mobile phone software, ultrasonic mosquito repellent,

Ultrasound is sound that is out of the range of frequencies that can be heard by the human ear, and some animals can hear and disturb their auditory sense. From this logic and principle, the human ear cannot hear.

As for what your daughter heard, it probably wasn't that, but maybe there was something special.

My school is 4,000 meters away from my home, but I can still hear the school radio at home.

There are things that science can't explain, and people sometimes have this special function, but if you ask me to explain it, I can't explain that I can sometimes see the tiny air, the movement, the secret dust in front of me in a clean house.

No, this frequency is not acceptable to the human ear. You're a kid ......I don't know.

Recognize some animals that can't hear ultrasound.

No, it is not in the range of the human ear.

What your daughter is hearing should be the sound of the phone working.

It's because her hearing range is beyond the ordinary.

There are bands that people can hear.

No. The frequency of mosquito wing vibration is about 250 to 1000 times per second, and the specific frequency is related to the species of mosquito, and the value of different species of mosquitoes has certain differences. So even if a certain frequency band of sound waves does repel a certain type of mosquito, it cannot be effective against all mosquitoes.

Assuming that ultrasonic electronic mosquito repellent is really effective, people have to receive ultrasound for a long time in order to prevent mosquitoes, which is very harmful to human health.

Mosquito repellent tips:Install orange light bulbs indoors, or put transparent orange cellophane on the bulbs, and mosquitoes will flee in fear of orange light when the lights are turned on.

Yes, for example, we are a manufacturer of ultrasonic cleaners, the workshop is on the first floor, the dormitory is on the second floor, because the machine is often tested, so the ultrasonic wave is often turned on, there are no mosquitoes on the first floor, there are many mosquitoes on the second floor, the first floor is the workshop, it is dirty, there are no mosquitoes, the second floor is clean and there are mosquitoes, and then I know that it is the reaction of ultrasonic.

Is the invention of ultrasonic mosquito repellent really effective? Try it in a mosquito nest!

Ultrasonic mosquito repellent is a machine that imitates the frequencies of natural enemies of mosquitoes, dragonflies or male mosquitoes, in order to repel female mosquitoes that bite people. It is completely harmless to people and animals, without any chemical residues, and is an environmentally friendly mosquito repellent product.

According to long-term research by zoologists, female mosquitoes need to be supplemented with nutrients within a week after mating to ovulate and give birth, which means that female mosquitoes will only bite and suck blood after pregnancy. During this period, the female mosquito can no longer mate with the male mosquito, otherwise it will affect the production and even worry about life. At this point, the female mosquito will try her best to avoid the male mosquito.

Some ultrasonic mosquito repellent simulates the sound waves of the wings of various male mosquitoes. When the blood-sucking female mosquito hears the above sound waves, she will immediately flee to repel mosquitoes.

According to this principle, the ultrasonic mosquito repellent uses this feature to design an electronic frequency conversion line to make the mosquito repellent produce ultrasonic waves similar to the wings of male mosquitoes, so as to achieve the purpose of repelling female mosquitoes.

Mobile mosquito repellent software works by generating high-frequency sound waves (inaudible to the human ear) and has no effect on the phone. But the effect is really not good.

It's useless, I've used it, it's indispensable to take a bite, hehe.

However, I heard that the effect is not as good as the legend. After all, when that thing was installed, it said it was ultrasound, and we couldn't hear it. The sound waves emitted by the mosquito repellent software belong to the ultrasonic range, which is above 20kHz.

Our existing computer audio system, whether it is the sound card or the speaker, is designed according to the human ear. Maybe the only thing this mosquito repellent software can do is to soothe your hot soul! Using software to repel mosquitoes is practical and convenient, but it's a bit flickering.

I also placed one when I recommended it to you. Hehe.

It seems like a lot, but this one I chose.

I've used it, but I personally don't think it's useful

Do ultrasonic electronic mosquito repellent work?

There is that kind of software, which is to send ultrasonic waves to repel mosquitoes, but I have tried, and the sound sounds quite uncomfortable, and I don't know if it has any effect on the human body, so it is better not to use it.

In principle, as long as the ultrasound waves emitted by male mosquitoes can attract female mosquitoes, they can attract mosquitoes that bite people, but it is difficult to know what frequency of ultrasound waves. Since mosquitoes also have a local "language", all kinds of ultrasonic mosquito repellent have no effect.

No, don't believe the gimmicks of merchants, I have never seen any official reports that ultrasound can repel mosquitoes.

No, mosquitoes don't have ears, that's all.

Heard that bats have ultrasound, and then the bats starved to death.

Do not drive away mosquitoes.

Taking 10,000 steps back, assuming that ultrasonic electronic mosquito repellent is really effective, people have to receive ultrasound for a long time in order to prevent mosquitoes, which is very harmful to human health.

As for the "buzzing" sound emitted by mobile phones, otolaryngologists said that the human ear is prone to irritability and physical discomfort when exposed to this monotonous sound for a long time, and even leads to tinnitus.

No! No! No!

Mimicking mosquito predators? Oh, mosquitoes don't even have ears or organs to feel sound vibrations, no matter how good you imitate it, it's useless, and if you can repel insects, you can only repel some moths, because some species of bats like to eat moths, but bats rely on ultrasound to sense objects, and moths have evolved to emit ultrasonic waves themselves, so that bats are not easy to detect and take the opportunity to escape. Therefore, this can only be effective for some moths, and mosquito repellent does not exist.

Yes, I've also heard that mosquitoes are most afraid of dragonfly sounds, and the ultrasonic software for the next dragonfly sound can repel mosquitoes. I've only heard about it, but I haven't tried it.

Useless. This thing has been around for a long time, the principle is that mosquitoes only female mosquitoes will bite after mating, male mosquitoes will not, female mosquitoes will avoid male mosquitoes after mating, ultrasonic mosquito repellent simulates the frequency of male mosquito wing vibration. I did it myself a long time ago, and then I saw a test report written by a professional in an electronic magazine, and I did an effective test on many brands of ultrasonic mosquito repellent on the market.

Ultrasound can repel mosquitoes.

It is feasible to repel mosquitoes through ultrasound from a medical point of view, and the ultrasound simulation objects used are male mosquitoes that female mosquitoes hate during pregnancy; The second is that mosquitoes are afraid of natural predators, bats, and mosquitoes are able to recognize and avoid the ultrasound waves emitted by bats.

Ultrasonic is a kind of sound wave with a frequency higher than 20,000 Hz, which has good directionality, strong penetrating ability, easy to obtain more concentrated sound energy, and has a long propagation distance in water, which can be used for distance measurement, speed measurement, cleaning, welding, stone crushing, sterilization and disinfection, etc. There are many applications in medicine, military, industry, and agriculture. Ultrasound gets its name from the fact that the lower limit of its frequency is greater than the upper limit of a person's hearing.

It seems to be okay, but it's not very good for the body.

Theoretically, it is possible to use a suitable band

Why do I still get bitten by mosquitoes when I use a strengthened ultrasonic mosquito repellent?

Anyway, send it again, look at the ultrasonic mosquito repellent, his thing is like a mouse, it's okay, the one who has left the post from afar seven or eight meters can scramble the mouse, anyway, the mosquito repellent effect is okay, but my feet are for humans for a long time, if I'm bored with that thing. It's not very good, so I can see that I didn't buy it, but just like a mouse from afar. Anyway, it's not appropriate to be bored.

Relatively close distances, high power is possible. But the long-range effect is definitely poor. There are also more empty environments, but more cluttered environments.

Mosquito repellent software, a new type of mosquito repellent software, was born and has been loved by many young peopleI feel like there are fewer mosquitoes around me, but is that really the case? Someone has done experiments, and the result is: mosquitoes do not respond, and people are easily irritable after listening too much.

Mosquito repellent software advertises itself as imitating mosquito repellent, and mobile phone software can imitate the call of male mosquitoes, which is a bit laughable, doesn't it say that opposites attract? There is also a saying that it can imitate the sound of bats, and that bats are natural enemies of mosquitoes, which sounds reasonable, but it is also nonsense. Hearing too much ultrasound is not good for the human body.

In general, the frequency of sound that can be heard by the human ear is between 20-20,000 Hz. The frequency of the spoken voice is 500 8000 Hz, so the sound waves used to test the hearing are 200 8000 Hz. The so-called "ultrasound" in the mosquito repellent software should be sound waves higher than 20,000 Hz, which cannot be heard by the human ear.

Therefore, the traditional mosquito repellent effect is better. We can ignite citrus peels indoors, which can both repel mosquitoes and eliminate odors in the house, and light mugwort leaves to repel mosquitoes. Dry mugwort leaves are rolled into ropes, lit and placed indoors, and the smell of smoke can repel mosquitoes.

We can also set up orange lamps at home, because mosquitoes are afraid of orange lights, so as to achieve the effect of repelling mosquitoes, and putting wind oil essence in the room can also achieve the effect of repelling mosquitoes.

It's not very useful, and people who listen to it too much will be more irritable. So it's better not to use it.

I think ultrasonic mosquito repellent software still has a certain effect, if it doesn't work, why would anyone invent it?

I don't think the ultrasonic mosquito repellent software is very useful, or the mosquito repellent methods we usually use are more effective.

Ultrasonic mosquito repellent is very unreliable, and it is better to use traditional mosquito repellent methods.

Ultrasonic mosquito repellent software can play a role. But nothing is absolute. It's better to use mosquito repellent water.

I don't think it's useful, I bought a physical mosquito killer before and it's very chicken, it's not easy to use at all, this kind of equipment that uses technology to repel mosquitoes has certain space conditions, and it's basically difficult to play a role.

It is useless, it is convenient to use electric heat to repel mosquitoes directly, as long as there are no mosquitoes, you will not hear the sound.

Those who have tried it can responsibly tell you that it is completely useless, and it is not as good as using an electric mosquito repellent solution.

I don't think this method will work much, I often use mosquito repellent water to keep mosquitoes away from us.