Name: 聞こえるかな？ (Can You Hear This?)
Uploaded: 2021-01-14T10:47:51.000Z
Duration: 7 min 55 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：

But we are not here to talk about magnets today.

Instead we are gonna talk about an instrument that we all have;

And then we are also gonna talk about ears,

Khoomei,which is an ancient Mongolian technique of

And we can do it too with the power of DONGS-

Pink Trombone was featured in a previous DONG,

If we right click anywhere, we can keep it from snapping back to its original shape.

cave with the tongue and use the front of the tongue to change the shape of the cave.

Well it comes down to how we pervieve and create tones.

Whenever we hear a tone we're hearing the main note.

And then a bunch of other notes on top of it called overtones.

and notes are the same name we give to them, so this

[PITCH PLAYING] So this is a tone, but calling it a 'G' makes it a note.

Anyway, what these singers are doing is isolating the overtones with their tongue

causing a two tone whistle now pudding.cool has a great visualizer on

overtones; the brighter a sound is the more overtones it has. Bright sounds are

things like a distorted electric guitar or a square wave or a raspy voice so

here we start with a sine wave and then we add the overtones on top and it gets

brighter and brighter. At first it sounds like real notes but as they get higher

and higher they just start to sound like buzz. The overtone series is why some

chords sound good together: they reinforce the harmonic series.

We can see this with the overtone generator website which lets you hear each relationship

between notes in the overtone series. Each bar changes the volume of a

multiple of the fundamental frequency. You can also see what different types of

waves look like, and what overtones each of them use.

Here's square, sawtooth, and a simplified version of a violin.

At the online tone generator we can check out alot of cool stuff with tones.

When you set it to one Hertz, do you hear the beat?

Now let's speed it up and it eventually becomes a note.

This means notes are just really fast beats, and beats are just really slow notes.

If we go back to the overtone generator we can see something interesting.

Any combination of notes can be thought of as a ratio

where each number represents the relative Hertz of each tone.

So this chord you're hearing has a relationship of 5/4.

Now remember that a tone we hear is just a really fast beat, so these two tones represent a poly-rhythm.

For every five beats of one there's four of the other

and that gives us a nice pretty major chord.

The thing is, our brains love simple math with small whole numbers.

As the numbers and the relationships get bigger and more complicated

they sound more and more dissonant and...kind of sour...off.

You can see this really clearly with the African polyrhythm generator.

This is essentially the same concept but slowed incredibly far down.

If you play the four beat and the five beat at the same time, well you're experiencing the same thing as a major third.

But if you bring the numbers up, it starts to sound a little crunchy.

You can also check out the page on binaural beats

which is an illusion that takes advantage of our brain's assumptions about what it's hearing

now, put on some headphones for this and play slightly different tones in each ear

and your brain will fill in the beat it assumes it should be hearing

So if we play a three hundred Hertz tone in one ear

and a three hundred one Hertz and the other, we will hear a pulse underneath it

At a rate of one Hertz; the difference between the two tones.

And if we go back to the regular tone generator and play that one Hertz beat again

Normally when you hear two frequencies that are similar, but not exactly the same

the compressions of the air that cause the sound will cancel each other out

causing a beats and this is not an illusion it's actually how

sound and air compression work. This website also has a hearing test that

will sweep through all the hearable frequencies.

Normally the human ear can hear between 20 and 20,000 Hertz

but with age and damage to the sensory hairs in your inner ear

you may lose sensitivity to certain frequencies.

also Jack probably should have closed this tab...

you just have one hour of relaxing Zelda breath of the wild music on

[LAUGHING] Now I know what you listen to.

Okay it's going up. We're hitting three thousand

Seven thousand. That's going to take a little while to get to twenty.

I feel like the dog is probably very upset.