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## Metamaterials Developed To Bend Sound Waves, Deflect Tsunamis110

Posted by samzenpus
from the building-it-better dept.
cold fjord writes in with this story about some new possible applications for metamaterials. "A new way of assembling things, called metamaterials, may in the not too distant future help to protect a building from earthquakes by bending seismic waves around it. Similarly, tsunami waves could be bent around towns, and sound waves bent around a room to make it soundproof. ... Metamaterials are simply materials that exhibit properties not found in nature, such as the way they absorb or reflect light. The key is in how they're made. By assembling the material — from photonic crystals to wire and foam — at a scale smaller than the length of the wave you're seeking to manipulate, the wave can, in theory, be bent to will. ... Ong and others say ... they could be used to redirect other kinds of waves, including mechanical waves such as sound and ocean waves. French researchers earlier this year, for example, diverted seismic waves around specially placed holes in the ground, reflecting the waves backward. Ong points to the possibility of using what has been learned in reconfiguring the geometry of materials to divert tsunamis from strategic buildings.'"
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## Metamaterials Developed To Bend Sound Waves, Deflect Tsunamis

• #### Tsunami "Bending" can't work (Score:2, Insightful)

on Friday December 27, 2013 @01:50AM (#45793813)

You are talking about redirecting amounts of energy in a wall of water than may be 10-20 feet high or more, yet it comes in as a solid wave and the elevation stays at that height causing water to move inland extremely fast for a long time.

It would be easy to calculate what amount of energy that would be in a width of a town: E = .5 * mass x v^2. You are talking about amounts of energy that would dwarf anything a major multi-unit power plant could produce.

• #### divert tsunamis from strategic buildings (Score:2, Insightful)

by Anonymous Coward on Friday December 27, 2013 @01:57AM (#45793861)

and towards some poor fishing village full of primitive natives nobody cares about..

• #### Re:5 Minutes of Computer Time (Score:2, Insightful)

on Friday December 27, 2013 @02:24AM (#45794003)

I suppose it's pointless asking you to grow up?

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