Bone conduction headphones are so expensive, but they can only make noise?

Rong used to always say,

Human genes think

Being lazy and gluttonous is the way to survive.

Working out is definitely going against the will of heaven.

So whether it's weightlifting or running,

It would be wonderful if you could bring your own background music.

At least it can relieve the boredom and pain a little bit.

Recently, there is a magic tool in the fitness circle that is very popular.

That is - bone conduction headphones.

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But is this thing reliable?

Isn't this another IQ tax?

Let’s discuss this together today.

Bone conduction headphones

It’s not a recent product.

As early as the early 19th century,

Beethoven, a famous German musician

He used it to compose his Ninth Symphony.

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But this "headphone" is actually a small wooden stick.

Bei Dashen bit one end of the stick with his teeth.

The other end is on the piano.

In this way, sound feedback is obtained.

It's a pity that I didn't apply for a patent at that time.

Otherwise, the name Beethoven

We have to add the word "inventor".

Just kidding,

This story mainly reveals to us

Two ways to listen to sound:

Air conduction and bone conduction.

Air conduction is,

The sound waves enter the auricle and cause the eardrum to vibrate through the external auditory canal.

Then to the auditory ossicles, cochlea,

Transmitted to the auditory center by the auditory nerve.

Bone conduction is when sound waves directly cause the skull to vibrate.

Then it goes to the cochlea and is transmitted to the auditory center by the auditory nerve.

Judging from the way Bei Dashen bit the small wooden stick,

He probably has an external auditory canal or middle ear disease.

This blocks the air conduction path of sound.

And no sound can be heard.

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But the bone conduction pathway is very smooth.

The inner ear and auditory center functions are intact.

So I can find another way to continue creating.

Real bone conduction headphones,

It appeared in an era when mobile phones still had 3.5mm headphone jacks.

Bluetooth headsets were not yet popular at that time.

Don't even think about running while wearing wired headphones.

Just walking normally.

Everyone can hear

The "bang bang bang" sound when the headphone wire swings back and forth.

This is the so-called "stethoscope effect".

It greatly affects the listening effect.

Bone conduction headphones came into being.

Since it uses skull vibration to transmit sound,

The vibration energy to the skull is much greater than the swing of the wire.

Plus the wearing method is to hang it on the ear from behind.

It can avoid the "stethoscope effect" to the greatest extent.

In addition, it does not need to be plugged in the ears.

So the outside world can be heard clearly.

It is very suitable for outdoor sports and is safe.

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So bone conduction headphones

It's basically a dedicated headset.

In addition to the advantages mentioned above,

It also avoids

Discomfort caused by sweating in the ear canal during exercise,

No need to plug in the ears.

It won't cause any damage to the ear canal and eardrum.

A more sophisticated bone conduction headset

It also has waterproof and shockproof functions.

You can wear it when swimming or boxing.

This is also unmatched by ordinary headphones.

But a coin always has two sides.

Its shortcomings are also prominent.

That's because the sound effects are too bad.

After all, bone conduction is through the skull

Transmits sound to the cochlea.

The sensitivity is far less than that of the thin eardrum.

More expensive bone conduction headphones.

The goal is to try every possible means to compensate for the distortion of sound quality.

But even if it is a bone conduction headset worth thousands of yuan,

The loss of sound through the skin and skull,

To the auditory ossicles,

Finally, we hear the sound effects

It's about the same as ordinary headphones that cost a few dozen dollars.

And because it does not block the ear canal,

It also doesn't have any noise reduction.

In a noisy place,

It is simply impossible to enjoy music quietly.

But recently, Rong Ge discovered one.

In addition to sports,

New usage scenarios for bone conduction headphones,

That means families with two children taking online classes.

Online classes can also be considered language programs, right?

I don't have any requirements for sound effects, and the environment at home is not noisy.

The two kids study their own things without interfering with each other.

It also protects the child's ear canal and eardrum.

Worth buying.

at last

For the inner ear and auditory center

For people with hearing impairment,

Bone conduction hearing aids are also a good choice.

If Bei Dashen had this thing back then,

Why do you need to bite the stick?

Maybe the Tenth Symphony and the Eleventh Symphony have both been created.

Source: China Digital Science and Technology Museum