Among the animals we are familiar with, which animals rely on ultrasound to determine direction?

Dolphinsand bats rely on ultrasound to discern their direction! Not only that, but they have also added a lot of inspiration to our Chinese scientific research, and many of the design inspirations of high-tech equipment in our country are ** on animals! For example, radar detectors, etc.!

Dolphins rely on the natural storage system to send high-frequency echolocation signals, sound waves propagate in the water and encounter objects will **, use words to understand the surrounding situation, dolphins can make judgments according to different responses, can judge whether there are enemies around or whether there is food, companions, etc., relatively speaking, this creature is relatively smart, some people have tested the IQ of dolphins is equivalent to a four-year-old child! <>

In nature, every animal has some more or less special functions, such as bats, in fact, we are talking about bats, everyone may be familiar with them, because in our impression, this creature has an ugly appearance and even carries various viruses When it comes to bats, everyone may think of dark, bloodthirsty, and terrifying adjectives! But this creature is relatively fast, and it can also use ultrasound echolocation to prey on dark nights, and it is a flying mammal.

Most of them are diurnal and nocturnal, and at night they use their sharp claws to hang themselves upside down in tree branches, caves, etc. <>

Because the frequency of sound is different, so there are some animal ultrasounds, we as humans can not hear, we humans can only hear the sound frequency in the range of 20 hertz to 20,000 hertz, unlike humans is that bats can receive 2 to 220,000 hertz range, people according to the characteristics of animals inspired to invent a lot of things, such as: fireflies.

inspired the invention of artificial cold light; Electric fish.

invented the Ford battery; The paws of many animals inspired the invention of cranes; The arms of the praying mantis led us to invent the chainsaw, and it can be seen that our lives are inseparable from the invention of animals! There may be more inventions for animals later in life! <>

Bats, some cetaceans including whales, beluga whales are all oriented by ultrasound and used for predation, etc.

Crickets, earthworms, mice, bats, goldfish, locusts and many more. These animals are all connected by means of ultrasound.

Ultrasound is used to discern direction and movement.

Bats mainly use a biological sonar system called electromagnetic wave reflection to navigate in complete darkness. This process involves sending an ultrasonic FM signal and interpreting the echo of sound waves when they encounter obstacles as well as nearby organisms** coming back. Electromagnetic wave reflection is so precise that bats are able to discern the location, size, direction, and even the physical nature of an object from each sound signal.

Not reallyAmong the common animals, only bats and dolphins, two special mammals (one can go to the sky and the other can enter the sea), are often used to locate ultrasound, and other species do not often use ultrasound in their own lives.

1. Moths - fire fighting (bright places).

Moths and other insects rely on the light of the moon to determine their direction when flying at night. The moth always makes the moonlight cast into its eyes from one direction. After the moth is running away from a bat or turning around an obstacle, it only needs to make another turn, and the moonlight will still come from the original direction, and it will find its direction.

This is a kind of "astronomical navigation".

2. Firefly - the flash signal of the luminaire

Similar to moths, they also rely on light signals for positioning and activity. Fireflies have specialized light-emitting cells, and there are two classes of chemicals in the light-emitting cells, one is called luciferin (in fireflies called firefly luciferin) and the other is called luciferase.

Luciferin can consume ATP under the catalysis of luciferase and react with oxygen, which produces an excited state of oxidized luciferin, which releases photons when oxidized luciferin returns from the excited state to the ground state.

3. Owl - eyes like a torch

The owl has a keen eye. In the dark of night, visibility is more than a hundred times higher than that of people. The owl has a large pupil, which makes it easy for light to enter the eye, and the retina is very rich in the ability to distinguish light and dark, and it also has a good sensitivity to low light, which is suitable for nocturnal activities.

In addition, there are 3 eyelids in the owl's eye, the upper eyelid is lowered when blinking, the lower eyelid is closed when sleeping, and the middle eyelid is a linear tissue that moves up and down the eye surface to clean the eye surface. Unlike other birds, the eyes are facing forward and the viewing area overlaps, so that the distance can be distinguished.

At the same time, owls are color blind and the only birds that cannot distinguish colors, except for some birds that are used to nightlife, such as owls, etc., because there are no cone cells in the retina, they cannot recognize colors, many birds have color sense.

Cats, bats, dolphins, crickets, mice, earthworms and many more.

With an ultrasonic generator, ultrasonic waves are emitted into the water, and if they hit a target, they are reflected back and received by the receiver. The azimuth and distance of the target can be measured according to the time interval and azimuth of the received echoes, which is called a sonar system. People were amazed by the invention of artificial sonar systems and the outstanding results achieved in detecting enemy submarines.

Don't you know that long before the appearance of humans on the earth, bats and dolphins have long been comfortable with the "echolocation" sonar system.

For a long time, living in nature surrounded by sound, they used sound to find food, escape predators, and courtship and reproduce. Therefore, sound is an important piece of information for living beings to survive. The Italian Spalajie discovered early on that bats can fly freely in complete darkness, avoiding obstacles and preying on flying insects, but after blocking the bat's ears, they cannot move an inch in the dark.

Faced with these facts, Palanzani came up with a conclusion that was difficult to accept: bats can "see" with their earsAfter the end of World War I, in 1920 Hartai believed that bats emitted sound signals at frequencies beyond the hearing range of the human ear.

It is also proposed that the method of positioning the target by bats is the same as the method of positioning with ultrasonic echoes invented by Lang Zhiwan in World War I. Unfortunately, Hatai's hint went unheeded, and engineers were hard to believe in the "echolocation" technology of bats. It was not until 1983 that the use of electronic measuring instruments completely confirmed that bats emit ultrasound waves to locate them.

Dogs, cats, dolphins, bats, moths, etc. Ultrasonic is a kind of sound wave with a frequency higher than 20000Hz (Hertz), with good directionality, strong reflection ability, easy to obtain more concentrated sound energy, and the propagation distance in water is farther than that of air macrorulers, which can be used for ranging, speed measurement, cleaning, welding, stone crushing, sterilization and disinfection, etc. There are many applications in medicine, military, industry, and agriculture.

Ultrasound gets its name because the lower limit of its frequency exceeds the upper limit of a person's hearing. <

Dogs, cats, dolphins, bats, moths, etc. Ultrasonic is a kind of sound wave with a frequency higher than 20000hz (hertz), it has good directionality, strong reflection ability, easy to obtain more concentrated sound energy, and the propagation distance in water is farther than in air, 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 because the lower limit of its frequency exceeds the upper limit of a person's hearing.

The propagation laws of ultrasonic waves such as reflection, refraction, diffraction, and scattering in the medium are not fundamentally different from the laws of audible sound waves. But the wavelength of ultrasound waves is very short, only a few centimeters, or even thousandths of a millimeter. Compared to audible sound waves, ultrasound has a number of singular properties:

Propagation characteristics The wavelength of ultrasonic waves is very short, and the size of the usual obstacle is many times better than the wavelength of ultrasound, so the diffraction ability of ultrasonic waves is very poor, and it can propagate in a straight line in a uniform medium, and the shorter the wavelength of ultrasound, the more significant the special haunting height.

Summary. At present, there are more researches: bats, whales, dolphins. There are certainly many more animals that can give out ultrasound <>

At present, there are more researches: bats, whales, dolphins. There are certainly many more animals that can give out ultrasound <>

Ultrasonic is a mechanical wave with a very short wavelength, generally shorter than 2 cm in air, which must be propagated by a medium and cannot exist in a vacuum. Ultrasonic waves propagate farther in water than in air, but because of their short wavelength, they are easily lost and scattered in air, which is not as far as audible sound and infrasound waves, but can be used for cleaning, gravel, sterilization and disinfection, etc. Ultrasound is commonly used in industry and medicine for ultrasonic detection, ultrasound and infrasound and audible sound are essentially the same, it is a kind of mechanical wave, usually in the form of longitudinal wave only propagation in the elastic medium cracking, is a form of energy propagation.

There are many bending animals that can feel and analyze infrasound waves. But only those known to be able to emit infrasound waves as a contact signal are; Elephants stomp on the ground with their feet and emit infrasound waves, and the same kind can be felt by their feet at a distance; Crocodiles, burying their hunger during courtship, will vibrate their backs on the surface of the water, emitting infrasound waves that can be felt by the opposite sex at a distance. Tiger, tiger roar has the power of infrasound, can shake the ears of misplaced people, the sound from low to high, can travel far <>

Animals such as <> mantis, crickets, locusts, moths, earthworms, rats, and whales are communicated with each other using ultrasound. Many people know that bats and dolphins can emit ultrasound, but the first animal that people found to use ultrasound was the mantis. Mantis has 3 types of chicken sounds.

The "Bachelor" mantis sang mostly wedding songs, and they often sang for hours at a time. When the other "bachelors" hear it, they will sing in duet with each other. The female mantis hears the music and goes to the meeting, and hail the waiter chooses the one who sings loudly.

When the two male mantis met, they sang the "war song" and set up a position in front of Hui Lao, shaking their tentacles frequently, and there was a great momentum of triggering. When there is danger around, the mantis will play the "alarm song", and the listeners will be silent and silent. The ultrasound language of dolphins is quite complex.

They can exchange information, discuss and discuss big ideas. In 1962, a group of dolphins were recorded when they encountered obstacles: first, a dolphin "stepped forward" and scouted; Then, after listening to the reconnaissance report, the other dolphins had a lively discussion; Half an hour later, the consensus was unanimous - there was no danger in the obstacles, there was no need to worry, and they swam through.