Signal Processing

• A lot of the cortex and other parts of the brain are for signal processing.
• That is, it processes the signals from the senses.
• We (scientists) understand this stuff relatively well, because animals do pretty much the same thing we do.
• We can stick electrodes in animals (e.g. cats, rats and monkeys) and see what the neurons do when particularly stimuli is presented.
• We can also take out that bit of the brain, and do in vitro experiments.
• We can even grow human brain tissue.
• For example, we know that the hair cells in our ears (neurons) respond to tone specific waves. So you have neurons for middle C, and different neurons for high C.
• I made a model that recognised vowells from this kind of input. (That's not very sophisticated.)