Spain. After several years of work, a team of Spanish researchers developed a system that makes objects acoustically invisible, starting from one of a smaller size than the one they want to isolate.
The team of researchers that developed the antisound mantle, as it has been called, belongs to the Wave Phenomena Group of the Polytechnic University of Valencia and the Institute of Materials Science of the University of Valencia.
In the article published in Applied Physics Letters, in which the research was disclosed, it is explained that the system causes sound waves to bypass the isolated object as if it were not, which according to the researchers is an advance in acoustic indetectabildiad.
It is a system of 120 aluminum cylinders of 15 millimeters in diameter that surround another cylinder of 22.5 centimeters. In the future, this development can serve to improve the acoustics of the urban environment, the soundproofing of performance halls, or the manufacture of elements that protect from extreme noise.
The development of the mantle has only been achieved in two dimensions, but scientists hope to be able to evolve the object until it reaches three dimensions in the coming years.
The researchers said that the cylinder is the first object to make acoustically invisible, but that they will continue in the coming years the work to achieve the same effect on larger objects and that the goal is to make a submarine undetectable by sonar.
