How did the sound of mosquitoes come from?

The sound of mosquitoes is not made by their mouths, but by the vibration of their wings when they fly.

Mosquitoes have slender bodies and feet. The size varies from species to species, and most of them are less than15 mm. The weight is about 2 ~ 2.5 mg, and one hind leg weighs only about 0.25 mg. Mosquitoes only have one pair of wings, and the other pair degenerates into a balance bar. The flying speed is about 1.5 to 2.5 kilometers per hour, and the wings of mosquitoes vibrate about 594 times per second when flying. This vibration allows us to hear the "buzzing" sound of mosquitoes flying.

Extended data

When mosquitoes "buzz" you, they have taken you as the target of biting. The following types are easy to be bitten:

1, people with developed sweat glands and high body temperature.

People who like sweating, the acidity in the blood is enhanced, and the discharged sweat makes the lactic acid value on the body surface higher, which is attractive to mosquitoes. In addition, mosquitoes have a heated body in their antennae, which is very sensitive to temperature. As long as the temperature difference changes a little, it can be detected immediately. People who sweat lose heat quickly and attract mosquitoes.

2. People who are tired or breathing fast.

People will breathe faster after engaging in sports or manual labor. Some people have larger lung capacity or faster breathing rhythm. In this way, the exhaled carbon dioxide is relatively large, and the carbon dioxide will form an airflow at a height of about 1 m above the head. Mosquitoes are sensitive to this and will smell it.

3. People who like to wear dark clothes.

Mosquitoes don't sleep during the day and go out at night, mainly because they have the habit of dark. If they wear dark clothes, they will have a black shadow at night, and mosquitoes will chase them to darker places. The color of clothes, such as black, is the first choice for mosquitoes to attack, followed by yellow, blue purple, blue, red and green. Mosquitoes don't like to bite white. Similarly, mosquitoes like to bite people with dark skin or red skin.

4. People with fast metabolism.

So children are easily bitten by mosquitoes, while old people are just the opposite.

5. People who make up.

In order to verify the allure of smell to mosquitoes, American scientists tested and analyzed more than 3,900 substances with olfactory instruments. It is found that hair gel, hand cream, facial cleanser and other cosmetics are very attractive to mosquitoes. Most cosmetics contain stearic acid (a fatty acid), so people who make up are more favored by mosquitoes.

Of course, there are also some smells that mosquitoes hate. The smell of bay leaves, lemongrass oil, citronella, garlic and geraniol will keep mosquitoes away.

6. Pregnant women.

Pregnant women are particularly prone to attract mosquitoes. A medical study in the United States shows that pregnant women are particularly attracted to mosquitoes, and the probability of being bitten by mosquitoes is twice that of other women.

7. People who drink.

People are also easily bitten by mosquitoes after drinking alcohol, eating beef and mutton or taking antihypertensive drugs.

Note: At present, science cannot prove that mosquitoes have a preference for a certain blood type.

References:

Baidu encyclopedia-mosquito