public enemy

monitoring room.

The students are going through the second round of tests. The teachers in charge of this task are also staying up late to observe their every move. The nurses of the school hospital are always ready to go in to save people.

"Some students have already started to feel anxious and are walking around."

"Students who are overly anxious and have extreme adverse physical reactions, if they can't persist, they should consider sending them out."

"Students who are asleep don't think about it."

Jiang Yan pointed to a surveillance screen, and laughed: "Are these two first-year freshmen in your class? One of them has fallen asleep! There is writing on the paper on the table, and I zoomed in to see, ouch, it's just The word 'infrasonic' is useless, too bad. Another, that's what it's doing."

"I don't know." Qiao Yan shook her head.

In fact, Qiao Yan was very surprised that infrasound was included in this selection.

The sound frequency that can be heard by humans is above 20 Hz, and the sound frequency below 20 Hz is called infrasound.

Infrasound waves have strong penetrating power and extremely long propagation distances, which can injure human brain nerves and shatter internal organs.

After countless experiments, only this fixed-frequency infrasound is the least harmful to the human body, and it is used by the First Military Academy of Huaxia as a communication wave in a special environment.

Those who can hear are nothing but elites with special talents, high brain width, or similar training.

The part about sound waves is just a brief explanation of the military network personal account password and how to make fixed-frequency sounds, as an elective course for some graduates.

"Infrasonic communication may not be useful, so take precautions before it happens." Jiang Yan said.

Qiao Yan said: "No matter what, I have never learned it before, and I just want to listen to it all night, it is still too difficult..."

At this moment, Qiao Yan was nervously looking at the room where Wu Hai was. Just now, Wu Hai's body had already experienced an uncomfortable reaction, but now, he is...

……

"239, 240, 241..."

Fight!Wu Hai started to do push-ups at an extremely fast speed. After his body heated up, he stood on his head directly, putting himself in a more painful state, counting the seconds loudly to divert his attention.

The cold sweat all over the body was gradually replaced by hot sweat, and the body gradually reached its limit during the excessive exercise.The irritable mood gradually calmed down during the exercise, and when he was exhausted to the extreme, Wu Hai was finally able to think seriously.

What kind of sound is there, what kind of sound has such a strong penetrating power, can ignore the transmission of walls, and stay in the dormitory, and still be affected by terrible effects.

It didn't help to know the answer, he couldn't hear it.

Wu Hai kept doing squats, push-ups, handstands, and trained mechanically back and forth.The physical strength reached the limit, and the muscles were sore to numb.

The brain is already confused.Can't think.Completely empty.

It finally became black before his eyes, and when he was about to fall down, there was a buzzing sound in his head.

Like a musical instrument picking a string, it makes a soft sound.

Followed by two vibrating tunes.

Wu Hai held his breath and supported the ground with both hands, not letting his precarious body fall down.

A whole sentence of music flows into the ears like flowing clouds and flowing water, soothing and melodious.

It's like splashes of color suddenly appearing in a blank picture scroll. In a silent night, how beautiful and beautiful the tune pops out.

Wu Hai was almost moved to tears, as if his restless emotions were calmed down, the symptoms of visceral pain and convulsions gradually improved.He was exhausted to the extreme, and he sat down on the ground with no image, leaning his back against the wall, and listened carefully.

The beating notes jumped into the ears mischievously.Wu Hai followed suit and hummed.

Just that one sentence, stumbling and humming so badly.

Meanwhile, the monitoring room.

With a snap, the coffee cup fell to the ground.

Jiang Yan maintained the posture of putting the cup, and didn't pick it up for two seconds in a daze. He clenched his fist excitedly, waved it a few times, and said, "This kid has talent!"

Qiao Yan looked at Wu Hai in the surveillance screen, and suddenly felt an indescribable feeling.

The news that Yuan Yile became a one-star sergeant spread wildly in the class, Qiao Yan was not surprised.On the contrary, Wu Hai's brain width naturally increased by 1, but it attracted the attention of her and Holmes.

When students measure their brain width on any machine in the school, it will be recorded in the school database, and the head teacher of the class they belong to will know the first time. Those who are blocked by the privacy authority are students and people outside the school.

In the past, the brain width increased normally, and after it was higher than the average of the parents' brain width, there are only two recognized ways to increase the brain width again.

One is the evolution agent of brain width, and the other is to develop potential by going to extremes on the edge of life and death.Wu Hai is recognized as the latter.

Qiao Yan has always believed: "The five senses evolve, and the brain width theoretically has the potential to exceed 50, but it happens to be visual evolution, which is recognized as an auxiliary type. There is no need to fight so hard."

"Wu Hai belongs to the generation of the army. He is in the stage of potential development, but he can't use the valuable brain-wide evolution agent."

"Under natural circumstances, it is almost impossible to break through the brain width of 18 before the age of 20."

Qiao Yan, who is at the forefront of brain development, made an objective inference based on her consistent experience.In her opinion, Wu Hai is not a power type, but a support type, and the support is not students at this level, but the army.

It doesn't matter to Yuan Yile if the team fights like this, the key is that Wu Hai will take detours.

So Qiao Yan planned to separate Wu Hai and Yuan Yile's group at the end of this semester, and let Wu Hai assist Li Mu or Wang Lun, depending on the final results.

"It's up to you to arrange the grouping, I have no objection. But it's not appropriate to position the students as assistants." Holmons thinks that it still depends on the final grades at the end of this semester and makes a comprehensive consideration.

Once it is defined as an auxiliary type, it will no longer be able to perform missions during the school period, and will join the army in the future to stabilize the auxiliary route.

Safety, insurance.

Many students will be rebellious at first, and it will be difficult to accept, but time will prove that the teacher is right.

Qiao Yan never understood.

This student Wu Hai is young, what kind of mentality does he use to force himself to fight stronger mutant beasts, break through the limits of the human body at the critical moment of life and death, and achieve the improvement of the breadth of the brain.

But now, seeing Wu Hai like this, she might understand.

Fight, really too hard!

But the improvement of the brain width is limited, and the combat power will soon reach the limit. There is no need for the 'assistant type' to be so difficult for themselves...

Qiao Yan frowned and said, "It's not enough, there's only one sentence. It's time, if you don't listen to everything, you still fail."

How could Wu Hai, who had finally recovered his breath, know that the teacher misunderstood him. The increase in the breadth of his brain was entirely due to the gift of killing strange souls. The battle process was very enjoyable...

It was already four o'clock in the morning, Wu Hai went out, stood in the corridor on the second floor stretched, mentally exhausted, but relaxed physically and mentally.

A line of lyrics that was originally incoherent has become much coherent, and it will only sound once every so often.

However, there are more than a dozen words in a sentence, isn't the paper handed in by Yang Qin written too little?

Wu Hai whispered: "Tell me to cheer, I don't know if that guy Yuan Yile can hear it... Eh, who is that?"

At the end of the corridor on the left, there was a man with his back facing him, and his upper body was lying on the guardrail, seeming to be breathing.

Yang Qin!

The idol also stayed up so late, and lived on the same floor as me!

Wu Hai was suddenly a little nervous, looking at him from time to time, hesitating whether to say hello, but he didn't know what to say.

Before I knew it, 10 minutes passed.

"……very noisy."

A slightly depressed voice came from afar, slurring each word and speaking very slowly: "I played this song over and over again, it's so noisy."

Is it a song?

the whole song?

Wu Hai was startled, he suddenly woke up, and whispered: "Don't! Don't talk to me, don't tell me if you know..." Otherwise, he will be eliminated!

Yang Qin turned around, leaned his back against the guardrail, and looked at Wu Hai coldly.

Wu Hai suddenly became timid, turned his head and walked towards the open door, because he was nervous, when he turned his head, he heard the sound of bones in his neck getting stuck.

He reflected subconsciously. I spoke very quietly, so he probably didn't hear me.

But auditory evolution.

But Wu Hai was mainly worried about what to do, would it be revealed that the song would be eliminated? He only heard one sentence, but when he was reminded, he didn't need to listen to the whole song to know which song it was... Sigh!

"I am talking to you with the same frequency as the communicator above, and you will answer me when you hear it. The monitor cannot record my voice, and I can only see you talking to yourself. Don't worry."

The same voice came slowly, but still very slowly.

Wu Hai paused, then suddenly turned his head and looked at the man.

It was the idol who spoke first!

He was already desperate if he could hear a sentence, but Yang Qin could not only listen but also speak, a terrible auditory evolution!

"You, you wait!" Wu Hai quickly entered the room, took something out, and quickly walked up to him, "You..."

This serious appearance made Yang Qin feel pressured.

Wu Hai lifted up the pen and paper, stretched it out in front of him, his palms were a little sweaty, and said seriously: "Can you sign me, my friend admires you very much, my friend is in the same class as me, I It's Class Two."

"Class [-], Grade [-], Teacher Qiao Yan." Yang Qin paused. Generally, it is normal for the juniors in the following classes to take him as the target, but those who can reach this stage and even have the possibility to pass the test are very talented. , not so...so frank and rare, so I took the paper from his hand and asked, "What's your friend's name?"

"Wu Hai. The mouth is Wu, the horror that shocks the world." Wu Hai replied solemnly.

Yang Qin looked at one of the freshmen that the head guard was looking forward to in the round of screening in front of him, and thought to himself, isn't it you.

Out of courtesy, it was not revealed.He said: "I will write to you tomorrow. The light here is not good."

"it is good."

A rare opportunity.Wu Hai asked again: "If my friend is qualified, can I join you in this mission?"

There are always at least two teams when doing missions. Yang Qin is famous as a lone ranger with "strong strength and good character".

Wu Hai was mentally prepared to be rejected.

Unexpectedly, Yang Qin said: "If you all pass the test, you can." Teacher Qiao Yan valued students very much.

As soon as Yang Qin left, Wu Hai wanted to jump up, and hopped lightly into the room.

Already know that song.

Yang Qin talked to him with a voice of the same frequency, it was like opening a small stove.

Within an hour, Wu Hai listened to the entire song.

Early the next morning, the remaining students went to the venue in order to gather, folded and handed in the written finger strips, and then they could communicate with each other.Jiang Yan and Qiao Yan are counting the screening situation.

"Did you hear it!" Wu Hai and Yuan Yile said in unison.

"Answer me first," Yuan Yile was very nervous, grabbing Wu Hai and asked, "Does what I told you yesterday inspire you?"

"I'll go, how much motivation can a word of cheering be."

"How could I just say "Come on!"

Wu Hai asked, "Otherwise, what else did you say?"

"I say! If you can pass, I will fight this face and I will be in the same group as Yang Qin." Yuan Yile said, "Although Yang Qin is a well-known lone ranger, he is a student that Teacher Qiao Yan values ​​very much. Now you and I are students in Teacher Qiao Yan's class, for the head teacher's sake, he will probably agree to form a team with us!"

Wu Hai silently gave him a thumbs up, then he made a mistake yesterday, no wonder Yang Qin agreed so quickly, and said: "Thank you very much, but as long as you can pass, we can all be with him." A group."

The more Wu Hai looked at him, the more uncertain he felt. He hadn't slept all night, so he could barely hear it. Yuan Yile looked as if he had slept well last night.

Yuan Yile was even more worried about him: "Did you hear it?"

Suddenly, the sound from the metal ball stopped abruptly, and the entire area was completely silent.

"The final results will now be announced."

Qiao Yan said: "Nine people qualified. They are——"

The audience was silent, and everyone couldn't help but hold their breath.

"Class One, Grade Three, Yang Qin!"

"Class One, Grade Three, Chen Mubing!"

"Class One, Grade Three, Yu Feixue!"

"Class Two, Grade Three, Zhang Xu!"

"Class Two, Grade Three, Fu Chen!"

"Class Two, Grade Three, Liang Rui!"

"Class Two, Grade Three, Jiang Linlin!"

"Class Two, Grade One, Wu Hai!"

"Class Two, Grade One, Yuan Yile!"

Qiao Yan continued: "The above nine students are qualified. The others can leave now."

"There are actually two first-year freshmen who passed." All the second-year students who were brushed blushed, and they all gathered to see who the two were.

"I heard that one of the freshmen is from the military generation."

"In the past few years, the generation of the military has blown out. It's all about nothing, blockbuster."

"They're all praising you." Yuan Yile looked proud. The feeling that the person he valued was recognized by everyone was happier than being praised, and he was happy in his heart, but he said, "No one praised me, I have a little emotion Yes, it will be good if Wu Hai praises it."

"You're hiding everything!" Wu Hai put his arm around Yuan Yile's shoulder and patted her hard.

Even Yang Qin stayed up most of the night, and almost everyone looked listless. Yuan Yile slept well and passed the test.

Yuan Yile listened with a smile on his face, and deliberately tilted his head to Wu Hai's side: "I didn't have time to tell you that a month before I came to the First Military Academy, my family dragged me back and gave me special listening training. It’s the infrasound wave of this frequency. If I can hear it, the family promised to let me choose the class through the back door through the relationship, otherwise, according to my family’s family rules, how could I have the opportunity to be in the same class as you or in the same group.”

"It's been too long since I practiced. Not long after I entered this area, it seemed that I heard a song playing. When you said quiet, I thought I heard it wrong."

Wu Hai was convinced: "Bull!"

"What's the sound? Head guard, can you reveal the answer?"

Last night, four students had abstained due to excessive physical discomfort. There were 46 students left, 37 of whom were unqualified, and almost all of them stayed up all night. They were very unwilling.

"No." Jiang Yan stood with his hands behind his back and said, "If you are interested, you can take the sonic listening course in the third grade."

"There are a lot of qualified people this time. Since there are first-year freshmen who have never been assigned a mission, they will not be grouped by class." Jiang Yan said: "You can form a team freely, at least two people, and report within 10 minutes I'm here."

There are three students in class one of the third grade, namely Yang Qin, Yu Feixue and Chen Mubing.

There are four students in the second class of the third grade, namely Zhang Xu, Fu Chen, Jiang Linlin, and Liang Rui.

There are two students in the second class of the first grade, namely Wu Hai and Yuan Yile.

"That's great, Sister Xue, the three of us are finally together again. Since Sister Xue went to class one, Linlin and I are in class two, and we've been with you for a long time," Liang Rui said happily, "I Just go tell the teacher. Let's go in groups of three."

"Yeah." Yu Feixue looked towards Chen Mubing and Yang Qin with a lack of interest, as expected.

At first Yang Qin stood alone on the far side, but due to his aura, no one went to him for the time being.

But after a while, he walked straight towards somewhere.

Seeing the idol standing in front of him so generously, Wu Hai felt dizzy. After adding countless filters, he was looking at Yang Qin, who was already very good.

It was too dark last night, and I only felt that the facial features were three-dimensional, and now it is impeccable when viewed up close under the light,

Yang Qin reached into his pocket, took out a note, and handed it to Wu Hai.

After folding it in half, I couldn't see the contents inside, and it still felt warm to the touch. Wu Hai said, "Thank you."

"What's the situation, you two know each other?" Yuan Yile looked at Wu Hai and then at Yang Qin, looking out of sorts, and wanted to grab the note, but Wu Hai quickly put it away.

What's the matter with passing a small note!

"No, no, I just happened to say something last night." Wu Hai said.Yuan Yile didn't like it: "No justice!"

"It's really just a few words." Wu Hai cheekily introduced himself and his friend Yuan Yile to Yang Qin, as if the joke yesterday didn't exist at all.

Yang Qin was inexplicably hostile to Yuan Yile, but he didn't care about it with his junior.

……

"Even freshmen know that it is good to enjoy the shade under the big tree. If this is the case, then we will not be polite."

Fu Chen and Zhang Xu immediately approached Chen Mubing and said, "Beauty, please form a team."

Chen Mubing was very displeased with the frivolity of the two, but he had no choice.The two freshmen chose Yang Qin, which helped her out in a sense.

The nine people were divided into three groups, and each group was led by a veteran from Class [-], Grade [-].The strongest Yang Qin brought two freshmen, which is already the most suitable match.

Jiang Yan, the head guard, said: "All that remains is to inform the parents that you are going to the A-level hardest-hit area in five days."

Yuan Yile said: "No problem!"

Wu Hai became anxious: "Teacher, can you not tell your parents? I am the only sergeant in my family, and I can make my own decisions!"

Jiang Yan said: "This is not acceptable. You are underage, and the guardianship is in the hands of your parents. Otherwise, if something happens to you, how will the school explain to your parents?"

No accommodation!

Wu Hai's face immediately collapsed.

The author has something to say:

data:

The infrasound frequency of "neural" infrasound weapons is very close to the alpha rhythm of the human brain (8-12Hz), so when infrasound waves act on the human body, they will stimulate the human brain, cause resonance, and have a certain impact on human psychology and consciousness. In severe cases, it can cause insanity, insanity, shock, fainting, and loss of thinking ability.

The infrasound frequency of "organ-type" infrasound weapons is similar to the natural frequency (4-18Hz) of the internal organs of the human body, which will cause strong resonance in the internal organs of the human body.In mild cases, muscle spasms, trembling, and difficulty in breathing; in severe cases, blood vessels rupture, internal organs are damaged, and even die quickly.

Infrasound waves below 10 Hz can travel thousands of kilometers. In the summer of 1983, the Krakatoa volcano located between Sumatra and Java in Indonesia erupted. The strong infrasound waves generated by the eruption circled the earth three times, and it took 3 hours for it to disappear slowly.Its vibratory aftermath has been recorded by microbarometers all over the world.The usual sound insulation and sound absorption methods have very little effect on the strong penetrating power of infrasound waves. The 108Hz sound wave can be blocked by a piece of paper, while the 7000Hz infrasound wave cannot be blocked by a thick wall. The infrasound wave can penetrate more than ten meters thick. of reinforced concrete.

(Just click to understand, there are private settings in the text)

[Volume Two: The Fifth Ecological Zone]