Are the fish mute? Detailed answer

Free technical library

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Are the fish mute? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Comments on the article

Did you know?

Are the fish mute?

Even in the time of Aristotle, it was known that fish make different sounds.

People can hear the sounds made by some fish even without any instruments. Leonardo da Vinci suggested listening to "underwater voices" by putting your ear to a vertically lowered oar in the water. The same method was invented and is still used by fishermen off the coast of West Africa.

Pisces hear excellently with the help of ears located inside the head, next to the brain. The second auditory system of fish is the lateral line organs that run along the body on both sides. The lateral line picks up low sounds better, the inner ear picks up high sounds.

Fish hear only about 25 percent of the sounds that humans make, 20 percent of bird "talks" and almost do not perceive the ultrasonic signals of dolphins. But they can fully appreciate the choral singing of their closest neighbors - frogs.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

In which state is Washington, the capital of the United States located?

In 1790, when deciding to establish the city of Washington as the future capital of the United States (it officially became it in 1800), Congress decided to build it on neutral territory in order to avoid rivalry between different cities on the issue of the location of federal institutions.

Administratively, the city of Washington since 1878 coincides with the Federal District of Columbia (which is not part of any of the states).

Test your knowledge! Did you know...

▪ What mountain would be considered the highest on Earth if the height was measured not from the level of the ocean, but from the foot of the mountain?

▪ What is a cloud?

▪ When is a man in what the Japanese call the time of wisdom?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Named the new height of Everest 09.12.2020

The heads of China and Nepal, Xi Jingping and Bidhya Devi Bhandari, officially announced the new height of Everest.

"I would like, together with President Bhandari, to officially announce to the world on behalf of China and Nepal that the height of Everest is 8848,86 meters," the Chinese leader said in a letter.

Earlier Tuesday, a video conference was held with the participation of the foreign ministers of the two countries, at which new data obtained by Nepalese and Chinese researchers were announced.

The Department of Geodesy of the Ministry of Land Management of Nepal assures that the measurements are accurate to the centimeter. The error of the new data on the height of Everest, obtained by comparing data from the GPS and Beidou satellite systems, is plus or minus two cm.

Recall that an agreement on the joint measurement of Everest was reached last year during Xi Jinping's visit to Nepal. Such a need arose after the assumptions of a number of scientists that the mountain could have decreased due to earthquakes in 2015.

Nepal and China disagreed over the height of Everest back in 2015. Countries called different heights of the peak and because of this they could not sign the border protocol.

Other interesting news:

▪ Mammoth Revival

▪ In a hot air balloon - into the stratosphere

▪ Bacteria that eat dirt and breathe electricity

▪ Silicone chip for artificial retina

▪ Hockey matches with a first-person view

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the Radio Control website. Article selection

▪ Article Contract law. Crib

▪ How high can insects fly? Detailed answer

▪ Article Orientation in the tundra and forest tundra. Tourist tips

▪ article Compensating current sensor with magnetic shunt. Encyclopedia of radio electronics and electrical engineering

▪ article Molding from plastic. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews