Accoustic Cloak Achieves Sonic Invisibility

A small acoustic cloak has been created by Duke University researchers. Sound waves striking a bump covered by the cloak bounce back as if they hit a flat wall instead.


(Acoustic cloak made from metamaterials)

To manipulate sound waves in air, (electric engineer Steven) Cummer’s team designed and built a cloak that sits atop an object like a piece of draped carpet. By layering simple metamaterial building blocks — ordinary strips of perforated plastic — the researchers hid a triangular wooden block a couple of inches high and more than a foot long at its base.

Sound waves over a range of high but audible frequencies slowed and changed direction cleanly after striking the holey plastic. Most reemerged appearing to have traveled all the way down to the flat surface beneath the block.

I don't have exact match for this in my index of sf inventions, but I'm sneaking it in as an invisibility cloak that would hide you from bats.

From Acoustic cloak from metamaterials.

Scroll down for more stories in the same category. (Story submitted 7/5/2011)

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 ( 1 )

Related News Stories - (" Material ")

Osmiridium Sounds Like Science Fiction (But It's Not!)
I can't resist science-fictional elements. Especially when they're real.

'Metallic Wood' Strong Like Titanium, Floats In Water
'A metal... light as cork and stronger than steel...' - Edgar Rice Burroughs, 1929.

Self-Healing Material Pulls Carbon Out Of The Air
'... could seal the punctures.' - Raymond Z. Gallun, 1951.

Shapeshifting Materials Transform By Light
'Its lines wavered, flowed, and then painfully reformed.'- Philip K. Dick, 1957.

 

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

Entire Planet Modeled In New MS Flight Sim
'CIC uses [it] to keep track of every bit of spatial information that it owns...'

FlyZoo Robot Hotel By Alibaba
'... hotels that specialized in non-human service.'

Implanted Memories Provide Songs To Birds
Finches can't tell the difference.

Robot Tuna Swims As Fast As Nature's Tuna
'With one fluid motion, it surged forward, plunged, and was gone.'

Shapeshifter Robot Is Comprised Of Cobots
'Its lines wavered, flowed, and then painfully reformed. For an interval, the device struggled with itself...'

Google Commits To Fighting Deepfakes
'The program raced up the screen one scan line at a time, subtly smoothing, deleting and coloring.'

China Accused Of Harvesting Organs From Unwanted Groups
'The death penalty was his immortality, and he would vote the death penalty for any crime at all.'

Osmiridium Sounds Like Science Fiction (But It's Not!)
I can't resist science-fictional elements. Especially when they're real.

When Will We See The First Space Hotel?
'The heart of it was a vast hexagonal structure of welded metal, ten miles across...'

SpaceX Starhopper Has Flash Gordon Style
SpaceX makes retro cool spacecraft.

Mindar The Robot Buddhist Priest Offers A Blessing
'Not working is the hardest work of all.'

Does Your Company Need A 'Chief Dreamer'?
As far as the future is concerned 'they're the only experts we have'.

Helios Modular Touch Screen Wall Lights
'The walls and ceiling bore an irregular spacing of illuminum tiles...'

Zephyr Solar-Electric Stratospheric Drone
'The planes flew continuously, twenty-four hours a day...'

Robot Hummingbird Hovers Biomimetically
'With a buzz... it started out on its journey.'

Harvest Water From Air With Sunlight
'The atmosphere yielded its moisture with reluctance.'

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.