Computer reads brain activity to find out the music each person is listening to
It may sound like sci-fy, but mind reading equipment are much closer to become a reality than most people can imagine.
A new study carried out at D’OR Institute for Research and Education used a Magnetic Resonance (MR) machine to read participants’ minds and ¿nd out what song they were listening to, according to sciencedaily.com.
The study, published in Scienti¿c Reports, contributes for the improvement of the technique and pave the way to new research on reconstruction of auditory imagination and inner speech.
In the clinical domain, it can enhance brain-computer interfaces in order to establish communication with locked-in syndrome patients.
In the experiment, six volunteers heard 40 pieces of classical music, rock, pop, jazz and others.
The neural ¿ngerprint of each song on participants’ brain was captured by the MR machine while a computer was learning to identify the brain patterns elicited by each musical piece.
Musical features such as tonality, dynamics, rhythm and timbre were taken in account by the computer.
After that, researchers expected that the computer would be able to do the opposite way: Identify which song participants were listening to, based on their brain activity — a technique known as brain decoding. When confronted with two options, the computer showed up to 85 percent accuracy in identifying the correct song, which is a great performance, comparing to previous studies.
Researchers then pushed the test even harder by providing not two but 10 options (e.g. one correct and nine wrong) to the computer.
In this scenario, the computer correctly identi¿ed the song in 74 percent of the decisions.
In the future, studies on brain decoding and machine learning will create possibilities of communication regardless any kind of written or spoken language.
Sebastian Hoeàe, researcher from D’OR Institute and PHD student from Federal University of Rio de Janeiro, Brazil, said, “Machines will be able to translate our musical thoughts into songs.
“The study is a result of a collaboration between Brazilian researchers and colleagues from Germany, Finland and India.”
According to Hoeàe, brain decoding researches provide alternatives to understand neural functioning and interact with it using arti¿cial intelligence.
In the future, he expects to ¿nd answers for questions like “what musical features make some people love a song while others don’t? Is our brain adapted to prefer a speci¿c kind of music?”