The U.S. patent, granted to Sony researcher Thomas Dawson, describes a technique for aiming ultrasonic pulses at specific areas of the brain to induce "sensory experiences" such as smells, sounds and images. "The pulsed ultrasonic signal alters the neural timing in the cortex," the patent states. "No invasive surgery is needed to assist a person, such as a blind person, to view live and/or recorded images or hear sounds."
Method and system for generating sensory data onto the human neural cortex
US 6729337 B2
US 6729337 B2
Abstract
A non-invasive system and process for projecting sensory data onto the human neural cortex is provided. The system includes a primary transducer array and a secondary transducer array. The primary transducer array acts as a coherent signal source, and the secondary transducer array acts as a controllable diffraction pattern that focuses energy onto the neural cortex in a desired pattern. In addition, the pattern of energy is constructed such that each portion projected into the neural cortex may be individually pulsed at low frequency. This low frequency pulsing is formed by controlling the phase differences between the emitted energy of the elements of primary and secondary transducer arrays.
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