Why are manufacturers of electric cars forced to artificially increase their noise? Detailed answer

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

Why are manufacturers of electric cars forced to artificially increase their noise? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

Why are manufacturers of electric cars forced to artificially increase their noise?

Modern electric cars and hybrid cars are almost silent. This, according to some researchers, poses a safety hazard for pedestrians who are accustomed to the hum of a car engine, and especially for the blind. In Japan and the European Union, laws have already been passed requiring manufacturers of such cars to install artificial noise systems. In the United States, mandatory equipment with such systems with automatic activation of noise when driving at speeds up to 30 km / h is introduced in 2021.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Males of what animals actively help females to eat themselves during mating?

In many spider species, the female may eat the male after, during, or instead of mating. In the vast majority of cases, he tries to avoid such a fate, but in the species of Australian widows, males actively help the act of sexual cannibalism. Having inserted the pedipalp into the female's genital opening, the male performs a somersault and places his stomach opposite her mouth. Self-sacrifice serves two purposes: eating increases mating time, which leads to the fertilization of more eggs, and a well-fed female is more likely to reject other suitors. According to studies, less than 20% of male Australian widows, in principle, find a partner for themselves during their lives, so leaving their genes to their descendants, albeit with a foregone conclusion, is a great success for them.

Test your knowledge! Did you know...

▪ How do glaciers move?

▪ What reward did Diogenes ask for for himself?

▪ What delicacy is produced in Sardinia, subjected to rotting and decomposition?

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:

A New Way to Control and Manipulate Optical Signals 05.05.2024

The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

Primium Seneca keyboard 05.05.2024

Keyboards are an integral part of our daily computer work. However, one of the main problems that users face is noise, especially in the case of premium models. But with the new Seneca keyboard from Norbauer & Co, that may change. Seneca is not just a keyboard, it is the result of five years of development work to create the ideal device. Every aspect of this keyboard, from acoustic properties to mechanical characteristics, has been carefully considered and balanced. One of the key features of Seneca is its silent stabilizers, which solve the noise problem common to many keyboards. In addition, the keyboard supports various key widths, making it convenient for any user. Although Seneca is not yet available for purchase, it is scheduled for release in late summer. Norbauer & Co's Seneca represents new standards in keyboard design. Her ... >>

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Random news from the Archive

Acoustic beacons protect against bird strikes 07.03.2018

Usually people try to ward off birds with signs that they can see, such as window markers and light signals, but this method does not always work. One possible explanation is that the eyes of birds are usually set not in front of the head, but on the sides of it, so that there is a blind spot right in the center of their vision. So scientists came up with the idea that perhaps sound would be a better warning signal.

Scientists trained 16 captive zebra finches to fly through a special corridor about the length of a bus. Sometimes the birds were allowed to freely travel the entire length of the corridor, but in other experiments a net was set up in the corridor to gently trap the birds as the safe equivalent of hitting a building.

The birds slowed down when approaching the net, but they slowed down even more if they heard a loud sound a meter from the net. However, the sound itself did not cause them to slow down, so the scientists suggest that the action of the "sound beacon" increased the overall attentiveness of the birds, and they noticed the net faster.

Additional evidence in favor of this hypothesis was the change in the postures of birds during the flight: they began to stay in the air straighter when they heard a sound. A scientific study has shown that fewer birds collide with buildings when a siren and a light signal are used to warn them of danger.
The authors of the study acknowledge that this method needs to be tested "in the field" as well, by observing how such "acoustic beacons" will affect birds in nature. This issue is not only about saving birds, but it is also of economic importance: collisions of birds with aircraft and ground structures increase the risk of malfunctions and disasters and annually cause billions of dollars in losses to the aviation industry and other sectors of the economy.

Other interesting news:

▪ Artificial retina will help the blind

▪ Pocket electronic encyclopedia

▪ edible cotton

▪ Sony HT-AX7 Wireless Audio System

▪ Mobileye EyeQ4 single-chip system for semi-autonomous vehicles

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Power supply. Article selection

▪ article Actions of the teacher in case of accidents, catastrophes and natural disasters. Basics of safe life

▪ article In which country can prisoners shorten their sentences by reading books and working out on exercise bikes? Detailed answer

▪ article Metal cutter. Standard instruction on labor protection

▪ article Low battery indicator. Encyclopedia of radio electronics and electrical engineering

▪ article Protection of electronic equipment from voltage surges. 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