Can Electrical Signals Be Converted to Sound and Used to Read Minds?

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Discussion Overview

The discussion revolves around the possibility of converting electrical signals from the brain into sound, specifically to "hear" inner thoughts. It explores theoretical and practical aspects of this concept, including the limitations and current understanding of brain activity measurement.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the feasibility of converting brain electrical signals to sound to access inner thoughts.
  • Another participant points out that while speakers convert electrical signals to sound, this does not equate to hearing thoughts.
  • It is suggested that computer-generated sound could be based on measurements from electrodes, but this would yield random patterns rather than coherent thoughts.
  • A participant references a study indicating that mapping brain activity could provide rough estimates of visual input but emphasizes that no correlation exists for thoughts.
  • There is mention of specific neurons responding to particular stimuli, such as a name or image, but this does not imply a generalizable method for thought recognition.
  • Questions arise about the potential for estimating thoughts through computer programming, with skepticism about the accuracy and practicality of such methods.

Areas of Agreement / Disagreement

Participants express skepticism about the ability to hear thoughts through current technology, with some agreeing that while there may be methods to estimate thoughts, they are limited and not reliable. There is no consensus on the feasibility of accurately converting brain signals to sound.

Contextual Notes

The discussion highlights limitations in current understanding of brain signal interpretation and the need for extensive calibration and mapping to achieve any level of thought recognition.

Lokesh7890
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Hi friends I'm new here
I just want to know if we can convert electrical signals to sound
 
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That's what a speaker does.

[thread moved to electrical engineering]
 
I'm asking that if we can convert brain's electric signals to sound I.e.. So that we can hear their inner thoughts
 
You can computer-generate sound based on some measurements of electrodes, but that doesn't mean you can "hear thoughts". You'll get a random-looking pattern of neurons firing.
 
If you map the whole brain activity, calibrate it with known images and throw tons of highly sophisticated software in, you can get a very rough estimate of the visual input of the brain.

There is a rough correlation between the field of vision and spatial brain areas, so getting some rough idea which areas are active is possible (which you can see in the video). Sufficient to see that there is a face, but not more so far. Such a correlation does not exist for thoughts, at least no correlation is known. And even if there would be, it would need a huge amount of calibration to map it.
There are studies that monitored individual neurons, and apparently it can happen that those are highly specific - one study (http://www.nature.com/nature/journal/v435/n7045/full/nature03687.html, news article) found a neuron that responded to Halle Berry (pictures or her name written somewhere), but to nothing else tested.

Sure, a computer can learn such a correlation and then play a sound file where someone says "Halle Berry", but I don't think the question was meant that way.
 
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So there is no chance of hearing other's thoughts through this computer programming thing? Only we can estimate what others are thinking? and I think it would take so much time for us to even estimate what he /she thinks
 
Lokesh7890 said:
So there is no chance of hearing other's thoughts through this computer programming thing?
Not in the way you probably imagine. Brains are not operating with sound.
Lokesh7890 said:
Only we can estimate what others are thinking?
Not even that (at least not yet). There is a test subject where you can reliably check if that test subject thinks of Halle Berry, another one where you can check "if that persons thinks of an opera house, we can make an educated guess if it is the one in Sydney or not", and a few more isolated cases. Certainly of scientific interest, but most of the time humans are not thinking of Halle Berry or the Sydney Opera House.
 
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