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Scientists Use Brain Waves To Eavesdrop On What We Hear

Posted in Science on 16th Feb, 2012 11:50 PM by APM

The day we can scan a person’s brain and “hear” their inner dialogue just got closer. Scientists at the University of California, Berkeley recorded brain activity in patients while the patients listened to a series of words. They then used that brain activity to reconstruct the words with a computer. The research could one day be used to help people unable to speak due to brain damage.


It’s not every day neuroscientists get a chance to record activity from the human brain. A group of 15 patients suffering from either epileptic seizures or brain tumors were already scheduled to undergo neurological procedures. The patients, all English speaking, volunteered for the study. After neurosurgeons cut a hole in their skulls, the research team placed 256 electrodes over the part of the brain that processes auditory signals called the temporal lobe. The scientists then played words, one at a time, to the patients while recording brain activity in the temporal lobe.


The auditory features of a sound can be characterized by what’s called a frequency spectrogram that measures the strength of different frequencies within the sound. The scientists hoped to use the pattern of brain activity while the word “partner,” for example, was played to generate a second spectrogram. Were it perfect, this process, called “stimulus reconstruction,” would reconstruct a frequency spectrogram identical to the original. However, because the temporal lobe is only one of several brain regions that process sound, the scientists did not expect an exact reconstruction.


Brian Pasley, post-doctoral fellow and lead author of the study, devised two different computer models for the stimulus reconstruction. Each was created according to different assumptions about how the brain processes sound. One model outperformed the other, enabling the computer to reconstruct the original word 80 to 90 percent of the time.


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Author: Guest
Posted: 2012-07-30
Annoyed Posted on Whatever you mean by being western ? I am a girl, who was riesad in Bombay (More specifically, Amboli, so I grew up with Reuben and Keenan). I now reside in a Western Country . Let me tell you one thing, the amount of times I was groped, teased, touched inappropriately, had lewd remarks passed at me (all because I was dressed in Jeans and so in your opinion western ) did not seem fair. And, even though I did manage to slap some of these jerks, it did not stop others from doing the same thing. Now living in a Western country, I have never had that happen to me even once. It made me wonder how I could provoke' that response in one country and not another. I now believe, its not what we girls wear or do or say. Its the way some Indian men are riesad (I repeat some, because Reuben and Keenan were not those men)that allow them to believe that all women are nothing but objects . So, I'd suggest, get out of this delusional world of yours which offers you a false sense of security. And please stop blaming the victims. Reply
Author: Guest
Posted: 2013-10-25
dH2u7B Great, thanks for sharing this article post.Really looking forward to read more. Reply
Author: Guest
Posted: 2013-10-26
xoYy4w Wow, great post.Much thanks again. Keep writing. Reply
Author: Guest
Posted: 2013-11-23
By 2012e5b9b412e69c8810e697a5 - 10:29 PMoxycontinI'll gear this review to 2 types of pelpoe: current Zune owners who are considering an upgrade, and pelpoe trying to decide between a Zune and an iPod. (There are other players worth considering out there, like the Sony Walkman X, but I hope this gives Reply
Author: Guest
Posted: 2016-12-26
Those are one perfect pair of trousers! And they make you look great.. I noticed the difference in juicy couture over the last couple of mont/shyear.. Reply


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