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French scientists have learned to reflect seismic waves from buildings using the principle of creating invisibility cloaks for this. The results of the first field test of such a system are described in preprint in the archives of Cornell University. Brief the content of the work cites the Technology Review blog. System, developed by scientists, was built and tested in the south of France. It consists of a matrix of wells extending to a depth of 200 meters. On one side of the matrix in the depths of the rock was placed a vibration test, emitting seismic (aka acoustic) waves with a frequency of 50 Hz. On the other hand, where the building was supposed to be, there were vibration sensors installed. The principle of the structure of such a system is the authors borrowed from researchers of light metamaterials. These materials due to their structure have unusual properties. For example, through precise control of their structure, scientists can create invisibility cloaks – devices in which light goes around hidden object. Test showed that use seismic invisibility cloak allows almost completely reflect acoustic waves and thus protect the building. The disadvantage of the system is that during its construction neighboring buildings will receive reflected waves. As the next step, scientists are considering not reflecting seismic waves, and absorb them in the system.
Earthquake Matrix Life
