I started to read some cognitive speech stuff recently, there was this chapter talking about human's ear mechanics. It was OMG!
I thought it was just a sound wave (change in air pressure) on the outer ear, then the wave is being transferred to the ear drum, then to the oracle bones thingy and at last it reaches the cochlea. Through the nerves, the signal was brought to the brain. Then finished!
But now that i read something on that, only i know that the oracle bones serves as a signal normalizer, then the cochlea will somehow "filter" out the super sonic frequencies. Dog has different cochlea size, hence they hear a wider bandwidth. Then at the end of the cochlea, there is a hair thingy. There are up to 2000 hairs (if i'm not mistaken), that will convert the mechanical signal to electrical signal so that it can be send up to the brain.
And, one of the most interesting thing is, the speed of the electrical charge moving in the nerves is a lot slower than the speed of electron in a normal copper wire. But, how? How we manage to transmit a complex and up to micro-second signal? Scientist say that the 2000 hairs, each will take a different signal and reach the brain. When the brain reads it, it'll regroup them and that you can understand... OMG! Now i know!
How they did that? It's like 2000 cables running into a mixer and expect the mixer to automatically (programmed to be) put up nicely + "loseless" signal.
[Nerve system's limitation eg. For a normal person with height around 1.6m, there is a fraction of a second needed for the signal sent by the brain to reach his feet, so that the feet can react. Means, a lag. Hence, usually an organ player have to memorize the feet movement, because they have to move their feet to the right pedal and step on it before they can "hear" the sound. When they know they "hear" the sound and only after that they react, everything'll be too late! Interesting!]
"God CREATES that."
Ref: Music, Cognition and Computerized sound: An Intro to psychoacoustic-MIT press
I thought it was just a sound wave (change in air pressure) on the outer ear, then the wave is being transferred to the ear drum, then to the oracle bones thingy and at last it reaches the cochlea. Through the nerves, the signal was brought to the brain. Then finished!
But now that i read something on that, only i know that the oracle bones serves as a signal normalizer, then the cochlea will somehow "filter" out the super sonic frequencies. Dog has different cochlea size, hence they hear a wider bandwidth. Then at the end of the cochlea, there is a hair thingy. There are up to 2000 hairs (if i'm not mistaken), that will convert the mechanical signal to electrical signal so that it can be send up to the brain.
And, one of the most interesting thing is, the speed of the electrical charge moving in the nerves is a lot slower than the speed of electron in a normal copper wire. But, how? How we manage to transmit a complex and up to micro-second signal? Scientist say that the 2000 hairs, each will take a different signal and reach the brain. When the brain reads it, it'll regroup them and that you can understand... OMG! Now i know!
How they did that? It's like 2000 cables running into a mixer and expect the mixer to automatically (programmed to be) put up nicely + "loseless" signal.
[Nerve system's limitation eg. For a normal person with height around 1.6m, there is a fraction of a second needed for the signal sent by the brain to reach his feet, so that the feet can react. Means, a lag. Hence, usually an organ player have to memorize the feet movement, because they have to move their feet to the right pedal and step on it before they can "hear" the sound. When they know they "hear" the sound and only after that they react, everything'll be too late! Interesting!]
"God CREATES that."
Ref: Music, Cognition and Computerized sound: An Intro to psychoacoustic-MIT press
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