Feeds

Japanese ultrasonic speakers fire out digital info rays

'SteganoSonic' system can transmit sound or data

Application security programs and practises

Japanese boffins at Tokyo’s Keio university have been showing off new transmission technology which uses ultrasonic waves to send digital information in highly directional bursts.

Unveiled at the Open Research Forum 2012 in the capital last week, SteganoSonic features two plates covered in small ultrasonic speakers and a tablet fitted with a specially engineered receiver.

The speakers act as transducers, firing out digital information such as URLs at inaudible ultrasonic frequencies. The technology can also transmit audible frequencies so that a user's table could pick up the machine-readable URL and go to that web site just as audio arrives in the user's ears.

In the demo, the tablet displayed a web page intro of the SteganoSonic research when it was placed in the path of the speakers and users could hear an accompanying narration, according to Netlover (via RocketNews24).

The benefit of this kind of parametric audio system is that it’s highly directional in nature, meaning audio announcements and digital transmissions can be targeted at specific groups and locations without bothering others.

One example offered was sending out information and updates in a train station tailored to passengers standing on specific individual platforms.

Although ultrasonic sound systems have been mooted for use cases including riot control and military combat, the venerable Kyoto temple on stilts, Kiyomizudera, is apparently already using parametric tech to fire out announcements to visitors at the entrance of the site, preserving peace and tranquillity for those within. ®

Build a business case: developing custom apps

More from The Register

next story
Asteroid's DINO KILLING SPREE just bad luck – boffins
Sauricide WASN'T inevitable, reckon scientists
BEST BATTERY EVER: All lithium, all the time, plus a dash of carbon nano-stuff
We have found the Holy Grail (of batteries) - boffins
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
Famous 'Dish' radio telescope to be emptied in budget crisis: CSIRO
Radio astronomy suffering to protect Square Kilometre Array
Bad back? Show some spine and stop popping paracetamol
Study finds common pain-killer doesn't reduce pain or shorten recovery
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Securing Web Applications Made Simple and Scalable
Learn how automated security testing can provide a simple and scalable way to protect your web applications.