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Author Topic: First 3D Acoustical Cloak  (Read 962 times)

Offline burntheships

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First 3D Acoustical Cloak
« on: August 04, 2014, 07:23:35 AM »
Using little more than a few perforated sheets of plastic and a staggering amount of number crunching, Duke engineers have demonstrated the world’s first three-dimensional acoustic cloak



http://www.ee.duke.edu/news/4761



http://www.gizmag.com/3d-acoustic-cloak/31177/
Quote

Using little more than a few perforated sheets of plastic and a staggering amount of number crunching, Duke engineers have demonstrated the world’s first three-dimensional acoustic cloak. The new device reroutes sound waves to create the impression that both the cloak and anything beneath it are not there. The acoustic cloaking device works in all three dimensions, no matter which direction the sound is coming from or where the observer is located, and holds potential for future applications such as sonar avoidance and architectural acoustics. “The particular trick we’re performing is hiding an object from sound waves,” said Steven Cummer, professor of electrical and computer engineering at Duke University. “By placing this cloak cloak around an object, the sound waves behave like there is nothing more than a flat surface in their path.” To achieve this new trick, Cummer and his colleagues turned to the developing field of metamaterials—the combination of natural materials in repeating patterns to achieve unnatural properties. In the case of the new acoustic cloak, the materials manipulating the behavior of sound waves are simply plastic and air. Once constructed, the device looks like several plastic plates with a repeating pattern of holes

http://www.techonlineindia.com/techonline/news_and_analysis/287951/acoustic-cloaking-device-hides-objects-sound

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Offline robomont

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Re: First 3D Acoustical Cloak
« Reply #1 on: August 04, 2014, 11:04:30 AM »
good article,thanks bts
ive never been much for rules.
being me has its priviledges.

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