Outside the university's lecture hall, a bus with black windows was parked not far below the steps.

At this time, in the modified exhaust window on the top of the bus, there is a gas rushing out, making a whirring sound, and in the air intake on the other side, the shutter has been opened to the maximum, and the hissing air intake sound is like a poisonous snake spitting letters.

But none of this compares to the sound coming from inside the bus.

Its voice is constantly changing, even and delicate, like the sound of holding a hand through a delicate sandpaper, but it also seems like a melody is changing periodically in it.

On the side, Jiang Wei took a few security personnel and pulled out the cordon, and a group of people stood outside the three-meter line, like a group of geese that were about to be killed, stretching their necks in unison, tilting their ears sideways, and listening in the same posture.

Just like an old driver can judge the speed of the car by listening to the sound of the engine and know whether he wants to jump out of the car, the old astronaut, as long as he hears the sound of the engine, can basically have a basic judgment on the engine.

At this time, the sound made many people dizzy.

"The quality of this sound is really good, smooth, stable and delicate, if this engine is installed on something, it must be very stable and comfortable......" A professor who works in NVH was dizzy to hear.

"What is such a small engine used to hold on it, and it can't even push a helicopter!"

"Flying car?" this is the curious baby.

"It's a solo aircraft. "It's a bit of a stretch.

"That's all, it's useless right now. "This is a denial of the pessimistic party.

"Do you say that to the 'Cloud Master'?" someone opened the bar.

"I don't think this thing needs to be installed on anything, if I get one, I will tie it to the head of my bed, listen to this sound, and sleep soundly......" He Shisong quickly changed the topic.

Now, Yunshi is still a taboo topic.

He was 100% sure that "Master Yun" was definitely related to Gu Xiaobai, but this kid could appear in different places at the same time as "Master Yun", which made He Shisong himself a little confused.

But as soon as this sentence came out, everyone nodded in unison.

"This engine really has a very white style......

Whether it is the reduction of the noise emitted by the propellers, the reduction of the probability of underwater ships being discovered, the disturbance of marine life, or other noise control research, it is a specialized discipline - noise and vibration control.

It is a very important discipline in the industrial field.

This involves a question of "sound quality".

For humans, even noise has different qualities and brings completely different negative feelings to people.

There are even some noises that can bring people pleasant enjoyment, such as the roar of high-displacement engines, which can make many people's adrenaline surges, like an addiction, and they still want to listen to it.

An excellent engine, running smoothly and with a stable sound, provides immediate feedback to the driver, which is a very important part of the driving experience, so many people feel that electric vehicles are not used to driving.

Many people say that the sound of a high-end car with the door closing sounds high-end, which is also an important embodiment of "sound quality".

In a nutshell, there are three levels of sound quality.

The first level is to reduce the magnitude of the sound, eliminate abnormal noises and abnormal vibrations.

The second level is to improve the sound quality.

The third level is to design the "sound DNA" that belongs to each brand.

In other words, when you hear a voice, you know what kind of company's product it is.

The engine from Gu Xiaobai's hand, whether it is in the water or in the air, has a complete Xiaobai brand and has the attribute of "musical instrument".

Just in terms of the sound quality of the engine, it has been done to the extreme.

After all, this was Gu Xiaobai's original major.

As a musician with a particularly sensitive sense of hearing, if the sound quality is not good, Gu Xiaobai himself is afraid that he will go crazy.

Moreover, Gu Xiaobai has taken a step forward on the basis of improving quality.

"This engine sounds like Xiaobai's handiwork, maybe one day Xiaobai can use it to play other music. This is an expert in ship power, and he has seen the propeller made by Gu Xiaobai's first "black square formula".

At different speeds, the propellers made by the black cube formula emit sounds of different frequencies, as soft as humming, and in the middle of the sea, they can even attract whales to follow.

The Chinese scientists craned their necks and shook their heads in response, and the test stage alone already made people think about it.

Many of them have begun to get close to He Shisong, Gu Xiaobai can't reach it, if he has a good relationship with He Shisong, maybe he can touch this mini turbofan.

Next to him, KAI's accompanying experts, researchers from local universities, were eager to put their necks together, make a long neck, and stick their heads to the window.

Such a good thing, how is it not ours!

What method should be used to keep Gu Xiaobai in South Korea to do research?

Can our university use the teaching position to attract Gu Xiaobai?

He Shisong was thinking about it, and after he went back, he asked Xiaobai to dismantle his baby helicopter!

Dismantle now!

After dismantling, I immediately worked on a new type of turboshaft engine with Xiaobai!

Isn't it a waste to use such a good thing on such a mini turbofan?!

Everyone had their own ideas, and the discussion was in full swing outside the bus.

Then the question arises again: "What will Xiaobai put this thing on?"

They don't know, in fact, Gu Xiaobai himself is also entangled.

This engine has been built, what should it be installed on?

At this moment, Gu Xiaobai's mobile phone rang.

The call was from Hao Fanbai.

Just like every child who has played high receives a call, Gu Xiaobai's first reaction is: "You are so annoying......

It's annoying to call while I'm testing a new toy!

Hao Fanbai is used to it, when do I call you don't bother?

Help you govern the country, help you hold concerts, help you travel through time and space, and report something to you, do you still annoy me?

"I'm still annoyed, you still don't care about the Hualiu concert?"

"It doesn't matter what, it's good that you're responsible. Gu Xiaobai was about to hang up the phone.

"It seems that Childe, you have enough money to buy flying enterprises, enough money to do physics experiments, and enough money to make toys, and you don't need me to help you make money in the future?" Hao Fanbai did not hesitate to uncover the scars.

Gu Xiaobai glanced at his car.

Some people may not believe it, because it belongs to special materials, ultra-high-precision processing, Gu Xiaobai is in a hurry, and this car of parts adds up to tens of millions.

Not to mention the amount of labor and material effort involved in coordinating these materials and processing equipment.

If it weren't for Gu Xiaobai, if he changed to someone else, he wouldn't be able to get any money.

"What do you want me to do?" Gu Xiaobai reluctantly.

"I'm short of people here, so let's sing a song. ”

"No!" Gu Xiaobai shook his head again and again.

What are you kidding, I don't want to run to sing!

"Then help me make up a song!" Hao Fanbai said, "I'll find someone to sing." ”

“...... Okay...... What song?" Gu Xiaobai resisted and was wronged.

"Jun in the Clouds". ”

"Huh?" Gu Xiaobai suddenly thought of the witch who wanted to peach, "Don't!"

Hey, this guy actually chased after him?

"Then you can sing a song. Hao Fan Baiyun was light-hearted, "With you here, you are not afraid of not being able to suppress the field." ”

"That'...... I'll just make it up. Gu Xiaobai gave in.

"Childe is wise!" Hao Fanbai slapped a sycophant lightly.

How did a generation of virtuous ministers lower a tyrant?

Of course, it depends on the routine!