I remember reading about that, and found several articles via Google; here is part of one with a link to it at the end:
Sony patents brain controller
By Lucy Sherriff
Posted in Science, 7th April 2005 10:23 GMT
Sony has been awarded a patent for a technology that could conjure up smells, tastes and other sensations in the brains of movie-goers. Specifically, the patent (US Patent 6,729,337) covers "a method for generating sensory data onto the human neural cortex"."
...The technology is outlined in the patent thus: "Changes in the neural firing timing induce various sensory experiences, depending on the location...the system induces recognizable sensory experiences by applying ultrasonic energy pulsed at low frequency in one or more selected patterns on one or more selected locations of the cortex."
Elizabeth Boukis, a spokeswoman for Sony Electronics, described the invention as "prophetic", New Scientist reports. "It was based on an inspiration that this may someday be the direction that technology will take us," she told the magazine.
http://www.theregister.co.uk/2005/04...barin_control/
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