Name: 聴覚処理 (Auditory Processing)
Uploaded: 2021-01-14T06:30:40.000Z
Duration: 7 min 3 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Voiceover: In order to distinguish between

and something that has a much higher frequency,

when they're moving through the air very quickly,

So as the information from a base drum beating,

about how exactly the sound wave is converted

But now we're gonna go into how the cochlea distinguishes

all the way to the brain, in order for the brain

So this is known as "Auditory Processing."

Your brain needs to be able to distinguish

all the way up to a frequency of 20,000 hertz.

So this is a huge range, and in order to distinguish

between sounds of low and high frequencies,

So inside the cochlea, there's actually a membrane

if we took the cochlea and we unrolled it,

and looked at which hair cells were activated,

we would notice that hair cells at the very base

were actually activated by very high frequency sounds,

and hair cells at the very apex of the cochlea

are stimulated by very low frequency sounds.

just to make things a little bit clearer.

So this picture basically just shows the cochlea unrolled.

And as I mentioned before, this would be the base

and this would be the very tip, or the apex

And hair cells are found all along the basilar membrane,

so this membrane right here is the basilar membrane,

and there are hair cells implanted inside of it,

there are a whole bunch of these hair cells.

respond to a lower frequency, so 25 hertz.

So this would be something like a base drum,

and something with a very high frequency,

would be something like a bee's wings flapping in the air.

So as sounds with varying frequencies reach the ear,

and it'll eventually go into the ear, reach the cochlea,

and it'll actually travel along this basilar membrane,

that is attuned to that particular frequency.

that this is a frequency of 100 hertz for example.

The sound waves eventually cause fluid inside the cochlea

that the hair cells that are very sensitive

And these hair cells will fire an action potential,