According to long-term research by zoologists, female mosquitoes need supplemental nutrition within a week after mating to successfully ovulate and produce eggs, which means that female mosquitoes will bite and suck blood only after pregnancy. During this period, female mosquitoes can no longer mate with male mosquitoes, otherwise it will affect production and even have life worries. At this time, the female mosquitoes will try their best to avoid the male mosquitoes. Some ultrasonic repellents simulate the sound waves of various male mosquitoes’ wings. When the blood-sucking female mosquitoes hear the above sound waves, they will immediately flee, thus achieving the effect of repelling the mosquitoes.
The working principle of ultrasound is that high-frequency waves are generated by electronically changing frequencies. This high-frequency wave is not an arbitrary high frequency, but a specific frequency, which is generally the same as the frequency of dragonfly wing vibration or the frequency emitted by bats, which is to imitate the frequency. Ultrasound emitted by mosquitoes’ predators. The frequency that normal human ears can hear is 20-20,000 Hz, and the ultrasonic frequency is higher than 20,000 Hz. It is wrong to simply think that ultrasonic waves cannot be heard by humans, or that they are harmless. The structure of the human body is complex. There will be effects, especially for pregnant women, and children will have slight radiation.
The principle of ultrasonic mosquito repellent is to use the unacceptable sound frequency of mosquitoes to promote mosquitoes to escape, so as to achieve the purpose of repelling mosquitoes. This kind of sound wave frequency does not cause harm to the human body, because this kind of sound wave is not thunder. During the flight of mosquitoes, when the wings hit the air molecules, the recoil force of the air molecules increases, making it difficult for the mosquitoes to fly, so they have to escape quickly. This sound wave has an impact on people, but it has little effect on human health.
Post time: Mar-24-2022