The majority of natural materials possess a disorganized atomic pattern that disrupts the sound and electromagnetic wave propagation. When these waves make contact with such materials, they rebound and scatter, and their energy vanishes in a very sophisticated interactional model, which decreases in intensity. That implies that it is almost impractical to send undamaged data or energy across wave-broadcast platforms and to harness the full functionality of wave technology.
To understand that better, think for a moment about your smartphone. The GPS functions more destitute inside buildings where radio waves spread all over. On the other hand, besides its technological applications, wave technology can improve the work in fields such as biomedical imaging and geological surveys, where it is essential to be able to send waves over highly perturbed medium.
Researchers from the EPFL Engineering School, in association with TU Wien and the University of Crete, have designed a distortion-free system that permits sound waves to penetrate these environments.
Wave technology would allow turning opaque materials into transparent materials
It employs very small speakers as sound transmitters to balance wave propagation scattering. This system has been proven effective in real acoustic trials, according to the study’s report, published recently in the Nature Physics journal.
In the system, researchers can control tiny speakers to boost, dampen or offset the sound waves phases. That corrects the waves scattering that is produced as the waves hit obstructions, and thus accurately mimics the initial sound on the other side of the chaotic medium.
“We realized that our acoustic relays had to be able to modify the amplitude and phases of the waves in strategic places, to amplify or attenuate them,” stated Romain Fleury, the director of the Laboratory for Wave Engineering (LWE) at the EPFL Engineering School, and the study’s co-author.
the theory behind this work is universally applicable and might be applied in optics or radio frequencies equally, to render transparent materials or to take photographs across opaque materials.