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 | | 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 ")

Untethered Drone Gets Wireless Power
'We'll use my 'broomstick'.' - Robert Heinlein, 1942.

How Can Amazon Patent A Voice-Controlled Drone?
''Tight mid-shot...' he told it.' Karen Traviss, 2004.

'North Sense' Wearable Piercing From Cyborg Nest
'The fingers opened from the many-scaled stellarimeter grafted onto his palm.' - Samuel R. Delany, 1966.

Wearables For Animals Totally A Thing
'Twin deformities on either side of his skull had been engineered to house sensor units.' - William Gibson, 1981.



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

GyroGlove Idea For Parkinson's Was Suggested In 1926
'The gyroscope was revolving at the rate of three thousand revolutions a minute, and the slight humming was hardly noticeable...'

Otto Self-Driving Truck Kit Delivers Budweiser Beer
'Trucks gulped packages and scurried like beetles...'

Airnest Drone Flight Logging Tool
'He reached to unsnap the cartograph from his belt.'

Untethered Drone Gets Wireless Power
'We'll use my 'broomstick'.'

ESA Plans Akon Projectile To Europa ala Jules Verne
'... might [it] not be possible to project a shot up to the moon?'

Transparent OLED TV By Panasonic
It's the look of things to come.

Shape-Memory Metal Transforms Millions Of Times
'Annealed in any shape for a time, and codified, the structure of that shape is retained down to the molecules.'

Advertising Drones Hover Over Traffic In Mexico
'Blurbflies are allowd to travel the streets, buzzing their adverts alive and direct...'

How Can Amazon Patent A Voice-Controlled Drone?
''Tight mid-shot...' he told it.'

'North Sense' Wearable Piercing From Cyborg Nest
'The fingers opened from the many-scaled stellarimeter grafted onto his palm.'

proCover Smart Sock Prosthetic Limb Enhancement
'Series of chemelectric afferent nerve-analogues, which permitted it to gauge to an ounce...'

Robots And AIs Will Replace Humans At 7 Percent Of U.S. Jobs
'And Mike took on endless new jobs.'

Human Doctors Still Better Than Computers
'Nowadays surgery was normally done by autodocs...'

FEDOR Humanoid Robot To Join Russians In Space
Am enjoying view of Russian robot.

BMW Self-Balancing Motorcycle - Never Put Feet On Road
'He had never ridden any motorized device that lacked onboard steering and balance systems...'

MicroTug Is A Micro Robot Beast
'And it had been dragging something...'

More SF in the News Stories

More Beyond Technovelgy science news stories

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

Copyright© Technovelgy LLC; all rights reserved.