Acoustic Cloak Research Turns Practical

Acoustic cloaks, material coatings that could divert sound completely around objects, are the subject of continued research. A new study, Acoustic cloaking in two dimensions: a feasible approach, was published today in the New Journal of Physics by Daniel Torrent and José Sánchez-Dehesa from the Wave Phenomena Group, Department of Electronics Engineering at the Polytechnic University of Valencia.

To realise the cloak physically, the Spanish research team calculated how metamaterials constructed with sonic crystals, solid cylinders in a periodic array that can scatter sound waves, could be used in a multilayered structure to divert sound completely around an object.

Results were very encouraging, showing that optimum cloaking requires approximately 200 layers of the metamaterial but that there is scope for much thinner materials to be used than technology can currently produce.

The material could be used in a concert hall to make pillars "disappear" acoustically. Note that this is different (I think) from the idea of creating an open air zone from which sound cannot escape (like Robert Heinlein's hush corner and Frank Herbert's cone of silence).

Read about the original research in 'Inaudibility Cloak' Is Theoretically Possible.

Via Nuisance noise silenced by an acoustic cloak; thanks to Mike Wahl for pointing this one out.

Scroll down for more stories in the same category. (Story submitted 6/13/2008)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Engineering ")

Skin Wearable Harvests Power With Triboelectric Effect
'He had tightened the chest to gain maximum pumping action...'- Frank Herbert, 1965.

Neuroscientist Works Toward Virtual Immortality ala Clarke
'Nothing will be left of Jeserac but a galaxy of electrons frozen in the heart of a crystal.'- Arthur C. Clarke, 1956.

Colloidal Quantum Dots Make Spray-On Solar Cells Possible
'Black Power... you spray it on.'- Larry Niven, 1995

Race Into The Future With Bionic Boots
'The tremendous loping strides afforded by such devices... '- Neal Stephenson, 1995.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

DJI Phantom Drone Now With GPS Blocking
'Workarounds were illegal and the fines were expensive...'

OMOTE Face Hackers At Work Video
'...a video-manicuring program came on line.'

Vroom! Your Car Or Truck's Engine Noise Might Be Fake
'... a sound tape to supply the noise'

Care-O-Bot 4 Personal Service Robot
'Beside her moved a gleaming robant...'

Skin Wearable Harvests Power With Triboelectric Effect
'He had tightened the chest to gain maximum pumping action...'

EDSAP Wearable Stroke Detection
'His Altec cephalochromoscope, around which he had built the pleasure part of his schedule...'

Brand Killer Helmet Blocks Real-Life Ads
'Some merely held the holos [ads] at arm's length.'

In Vivo Micromotors Powered By Stomach Acid
First in vivo study of artificial micromotors.

Synthetic 'Squid Skin' For Camouflage On The Way
'The small, chameleon-clad figures continued to advance.'

3D Printer 'Teleports' Objects Like Simak's Way Stations
'An entirely new being but exactly like the old one'

Laser Etching Makes Metal Super-Hydrophobic
'The water flowed off those walls without binding tension.'

Patient Walks Out With Fully Artificial Heart
'The throb of the robot pump gave him confidence...'

Radisens' Gemini Instant Blood Tests
An amazing lab-on-a-panel.

Nonhuman Artist Collective Keeps Robot Artist Earnings Until Legal
Pay the artists!

Argentine Orangutan Receives Basic Human Rights
'They wouldn't dare let the Fuzzies be proven sapient...'

Elon Musk, Google To Extend Internet Into Earth Orbit, Then Mars
'This was the center of Interplanetary Communications.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.