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Topic: "cloack of silence" could hide submarines or find tiny tumors  (Read 535 times)
RyanS.
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« on: June 17, 2009, 12:30:20 AM »
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June 15, 2009 -- A new invisibility cloak for sound could help doctors find tiny tumors or hide submarines from enemy sonar.

"Our focus is not about dampening noise, but to guide sound waves around structures," said Nicholas Fang, a professor a the University of Illinois at Urbana Champaign and coauthor, along with Shu Zhang and Leilei Yin, on a paper that appears in the journal Physical Review Letters.

Watch video: Scientists work on invisibility tech for soldiers of the future.

For example, "if we have a coating on a submarine that bends acoustics waves before they hit the surface, guiding them around the submarine smoothly, then you won't be able to detect a submarine using sonar."

The same technology that could render a military submarine invisible to sonar could also be used to create high-definition, in-utero baby pictures or detect previously undetectable, tiny tumors.

Invisibility cloaks, whether for sound or light, both manipulate waves. Harry Potter-style invisibility cloaks manipulate beams of light. Acoustic invisibility cloaks manipulate waves of pressure. Whatever the wave type, the principle is basically the same; bend a wave around an object without breaking it.
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« Reply #1 on: June 17, 2009, 05:23:17 AM »
 Star wars comming to life.. "darth, they have there cloakin device one"  *sounds of breathing through a respirator *  "  well then we'll just kill everything you fool "   * thousands of lasers fire all over all at once hitting the cloaked object *

  :haha: :haha:
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RyanS.
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« Reply #2 on: June 17, 2009, 02:46:09 PM »
i say screw using something like this to cloak subs.....the idea of using it for medical research is way better. thats why i posted it...but still cloaking...more sci fi every day...
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« Reply #3 on: June 17, 2009, 02:57:29 PM »
There is a fair amout of research being done on nano-materials that can be made to be invisible to certain wavelength (sonar, etc.), but such a material effective for most of the visible wavelength (400-700 nm) still is far from being ready even for experimental usage. That means no harry potter invisibility cloak anytime soon.
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« Reply #4 on: June 17, 2009, 09:02:57 PM »
Quote from: RyanS. on June 17, 2009, 02:46:09 PM
i say screw using something like this to cloak subs.....the idea of using it for medical research is way better. thats why i posted it...but still cloaking...more sci fi every day...
Well you have to have the military aspect first. They pay the base research money to get it started. Then medicine, then silly toys for kids.  Laughing The trickle down theory. Much like internet first was a military toy, etc....
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« Reply #5 on: June 18, 2009, 06:16:51 AM »
Quote from: tommie gorman on June 17, 2009, 09:02:57 PM
Much like internet first was a military toy, etc....
Not exactly ~ I believe there was a 20 some year difference between the backbone the US military set up in the mid 80's for there missile detection operations.

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Origins of the Internet

The first recorded description of the social interactions that could be enabled through networking was a series of memos written by J.C.R. Licklider of MIT in August 1962 discussing his "Galactic Network" concept. He envisioned a globally interconnected set of computers through which everyone could quickly access data and programs from any site. In spirit, the concept was very much like the Internet of today. Licklider was the first head of the computer research program at DARPA, 4 starting in October 1962. While at DARPA he convinced his successors at DARPA, Ivan Sutherland, Bob Taylor, and MIT researcher Lawrence G. Roberts, of the importance of this networking concept.

 Source, and much more on the subject
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« Reply #6 on: June 18, 2009, 08:23:05 PM »
 cool
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