Japanese ultrasonic speakers fire out digital info rays

'SteganoSonic' system can transmit sound or data

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.…

via The Register - Networks

http://go.theregister.com/feed/www.theregister.co.uk/2012/11/30/steganosonic_japan_ultrasonic_data_transmission/