A wearable device that responds to human thoughts. Free Technical Library News

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Wearable device that responds to human thoughts

19.04.2018

Researchers at the Massachusetts Institute of Technology (MIT) have invented a system called AlterEgo that can recognize non-verbal signals - that is, in fact, read the mind of the wearer. The development consists of a computer system and a device that is attached behind the ear, runs along the chin line and ends under the user's mouth.

The wearable device's electrodes pick up neuromuscular signals in the jaw and face that are generated by inner speech - the words a person says in their head. These signals are fed to a machine learning system that analyzes the data and associates certain signals with words.

The system can also interact with the user through a "bone-conducting" earpiece, transmitting vibrations from the face to the ear. It is designed to make it convenient for the carrier to receive the necessary information without interrupting the conversation.

The researchers tested the system in a variety of situations, including playing chess, multiplication, and addition, using a 20-word lexicon in each case. With these 20 words, the design achieves 92% accuracy.

Over time, researchers want to achieve 100% accuracy. Another example of using AlterEgo is to select a movie to watch by controlling what is displayed on the TV screen.

To create such a device, it was necessary to determine the location of the facial points with the most reliable neuromuscular signals. To do this, the subjects were placed 16 electrodes in different parts of the face and asked to mentally pronounce sequences of the same words four times. So seven most effective zones were found. Now the Institute is trying to create the same device, but using only four points on the jaw line.

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