American physicists have created an

American physicists and engineers have developed a metamaterial that makes any underwater object "transparent" to sound and invisible waves for sonars. They introduced their development at the annual meeting of the American Acoustics Association in Washington.

This structure will protect submarine objects from high frequency vibrations and submarine concealment.

As Amanda Hanford of the University of Pennsylvania in Philadelphia (USA) notes, scientists have created dozens of structures that reflect or transmit sound waves through them perfectly, but they all work only in the atmosphere. book. Making "invisible hats" working in the country will be more difficult, because the water density is much larger.

Engineers from the United States have solved this problem - their metamaterial does not allow sound waves to pass through , but reflects sound in the way that observers seem to be looking at the flat bottom of the sea, river or ocean positive.

Structurally, it is similar to a pyramid with a height of one meter, covered by countless steel plates with many holes that can absorb and transform sound vibrations. According to scientists, its size and structure can be easily changed in the future, which will protect undersea objects from high frequency oscillations and submarine concealment and bathyscaphes (equipment self-study the depth of the sea) before the echo detector.