The research team at Tokyo Institute of Technology has developed a method of wearing electrodes on the head to measure brain waves and reproduce the sounds heard or thought of. In a simple experiment, AI restored the voice of the subjects with approximately 80% accuracy.

The brain generates electricity and magnetism with the activity of nerve cells, and the blood flow of cerebral blood vessels also changes accordingly. The use of electroencephalography (EEG) and magnetic resonance imaging (MRI) devices to capture these changes and investigate active brain regions is currently being studied.

This time, the research team has developed auditory related interpretation techniques that are considered difficult to accurately reproduce. AI can be used to analyze the data obtained from the EEG instrument, read and restore the sounds heard or thought of.

In the experiment, the research team played "white noise" with equal frequency components and amplitudes to 10 participants, allowing them to identify the two vowels "a" and "i" from the sound source. 32 electrodes worn on the scalp were used to read the listening process and subsequent brain activity during recall.