The attackers had already given an ultimatum, Bai Yue's face was cloudy, and after his eyes swept over a group of wounded soldiers, he sighed slightly, and finally hurried to the entrance of the underground fortifications.

Everyone knows very well that the other party is unwilling to delay and cause more casualties, and only by handing over the exoskeleton armor can there be a way to live, no one is afraid of death, but of the partners around him who are afraid of death, the death is not clear, except for Chu Yu and Bai Yue, everyone does not know what the identity of the attacker is.

Seeing that Bai Yue was not a tendon, Chu Yu finally put his mind at ease.

He knew that Bai Yue was not afraid of death, if there was only her here, she would not hand over the exoskeleton armor if she said anything, and the only outcome would be to die alone, but now it was different, dozens of lives were in her hands.

After less than a minute, Bai Yue dragged the exoskeleton armor and ran out, without any hesitation, and directly threw the exoskeleton armor out of the window.

Chu Yu's heart was raised in his throat.

He didn't believe that this group of attackers would keep their promises, but as the other party said, he and the others really didn't have any bargaining chips, they couldn't rush out, and the defense could resist for a while, but doing so could only anger the other party, and the group was finally wiped out.

Guns and grenades have been used, weapons of mass destruction must also be available, and there is no chance of winning in hand-to-hand combat, so the exoskeleton armor can only be handed over.

Chu Yu's worries finally came true, and the other party did not keep his promise.

One of the attackers ran back and dragged the exoskeleton armor away, then threw a small boxy box in and threw it at the front door.

Huang Haoran reacted quickly, and immediately pounced, ready to throw the box back, although he didn't know what it was, but everyone knew that it was definitely not a parting gift, and eighty percent of it was explosives.

Just as he approached, a gunshot rang out, and Huang Haoran flew back as if he had hit a high-speed train, and an armor-piercing bullet had basically penetrated the Cashslavic body armor.

There are snipers outside, obviously not wanting everyone to dispose of this box, so it can be seen that this is a big killer.

There are many people who are not afraid of death, and two more people rushed over, and Bai Yue is the same, ready to use human lives to fill it and throw the metal box out.

But at that moment, the metal case began to disintegrate rapidly, revealing what looked like a miniature engine inside.

Bai Yue shouted, "Find cover!"

The small engine-like device began to make some kind of sound, and as it increased incrementally, everyone sensed that something was wrong.

The first to bear the brunt were Chu Yu and Bai Yue, who were the closest, and the two of them felt that the world was spinning for a while, and then their vision began to blur, and their internal organs seemed to be burning.

Then the rest of the room suddenly fell to one knee and vomited.

Dracula was a little stronger, but his breathing was a little short, and he looked at everyone for some reason.

The sound was not very loud, but it was very harsh, and the glass in the room began to shatter and fall.

The sound doesn't look like it's coming from the device at all, as if it's already in everyone's mind

If you don't go, it's useless to plug your ears.

Dracula, who had an unusual physique, finally reacted to what was going on, as the only person in the house who could move freely, he first resisted Chu Yu and Bai Yue and threw them to the entrance of the underground fortifications, and then began to drag Feng Kaishan and Lao Sun, tossing several times, and then throwing everyone in the house into the entrance of the underground fortifications.

But it still didn't help, because the soul-piercing sound was still present in the brain.

On the way, many people's ears and mouths began to bleed, and even if they fainted, their bodies still convulsed, and if this continued, it was only a matter of time before they hung up.

Chu Yu shook his head vigorously, and finally remembered what this thing was.

"Infrasound! Infrasound that can kill!"

Chu Yu explained: "The sound that people can hear is the sound wave with a frequency between 20Hz and 20,000Hz, and the sound wave below 20Hz is infrasound. ”

Enduring the discomfort of the body, Chu Yu continued: "Infrasonic waves can cause damage or even fatality to the human body through resonance, if resonance occurs, the amplitude can not be attenuated and becomes larger and larger, then the consequences will be unimaginable, once it exceeds the bearing capacity of the object, the object will be dissolved, and the frequency of the infrasound wave If the frequency of the infrasound wave is synchronized with the natural frequency of the human organ or nerve, resulting in resonance, then the infrasonic wave will damage the body organs and nerves." ”

Everyone listened to it with little understanding, but they generally understood that the device at the door was a killing weapon that could release a sound, and this sound could kill!

Although Dracula was not too impressed, he was very sensitive to the voice, frowned and interjected: "Hertz is getting lower and lower, just around a hundred, everyone will have vomiting, skin redness and swelling, dizziness, anxiety and fatigue to varying degrees, now it is about forty-three to seventy-three hertz, this stage can make normal people's vision extremely reduced, sense of direction, muscle coordination and body balance will also be greatly reduced... ”

Chu Yu looked puzzled: "How do you know?"

"I don't know why I know. Dracula shrugged his shoulders, stared at the infrasonic device at the gate and said: "It can't go on like this, the sound is pervasive, there is no place to hide, and now it has been reduced to about ten hertz, this hertz is synchronized with the alpha rhythm of the human brain, and when it acts on the human body, everyone's psychology and consciousness will be seriously affected, and even lead to nervous disorder shock, if it reaches four hertz... Difficulty breathing, damage to internal organs, and eventually death!"

Bai Yue struggled to get up: "I'll go shut down that device, or destroy it!"

Everyone can see that the attackers don't want to leave any alive at all.

Instead of blowing up this place, it is better to use this sonic weapon to kill people invisibly, because if you blow up this place, you will make a mistake.

"The propagation medium absorbs very little low-frequency sound waves, so infrasonic waves have a strong penetrating ability, and if it is weaponized infrasound, it can penetrate at least fifteen centimeters of concrete or even tank steel plates. "Chu Yu felt self-conscious

His heart was about to explode, and he said with a nosebleed: "You can't get over it at all, and you'll die before you get close!"

After finishing speaking, Chu Yu sighed and spit blood, Bai Yue and Huang Haoran and the others were also uncomfortable, as serious as Chu Yu, even the lightest one was vomiting and had nosebleeds on his face, and these people were still hiding behind the wall.

Wind and water are pervasive, and so is infrasonic sound.

At this moment, Dracula scratched his head and slowly walked towards the exit of the main entrance.

In the stunned eyes of everyone, Dracula approached the infrasonic device step by step, and the more damage he received from Yuejin, when he walked to the door, he had completely absorbed the ultra-low hertz infrasound, his skin began to ooze blood, and his ears, nostrils, and mouth also spurted blood like a faucet that opened the gate, and the whole person was like a lonely boat floating in the stormy waves.

At a distance of less than twenty meters, Dracula walked for a full minute, and his speed was getting slower and slower.

With a difficult trail, Dracula finally crouched in front of the infrasonic device.

As if in the center of the storm, Drakurawa spat out a mouthful of blood and knelt in front of the infrasonic device.

Everyone's hearts rose to their throats, and Dracula approached the infrasonic device, but the guy was paralyzed and actually lay on the ground.

Just as everyone's hearts were going up and down, Dracula suddenly turned his head and smiled, like a child who had succeeded in his prank.

It's just this smile that makes people's hearts feel tight.

If it weren't for the fear of vomiting blood with one mouth, Chu Yu couldn't wait to greet Dracula's ancestors, at this time, he was still happy that your mother was a big watermelon, and it was only right to turn off the device quickly.

Raising his right hand, Dracula punched down, and with a flash of electric sparks, the device stopped working, the sound of infrasound disappeared, and Dracula lay on the ground and died.

Chu Yuqiang endured the discomfort and ran over.

Helping Dracula up, Imperial Chief Chu breathed a sigh of relief.

He breathed a sigh of relief because Dracula was still breathing a sigh of relief.

He could see that as long as Dracula was not thrown into the meat grinder, he would basically not die, and he didn't know where Chu Fugui found such a real freak.

In addition, there is a blasting device next to the device, with a countdown on it indicating that it will explode in seven minutes.

That is to say, the infrasonic device will make everyone in the building die within the specified time, and then the infrasonic device will self-destruct, and there will be no one at the headquarters, but nothing can be found.

Bomb disposal, except for Chu Yu and Dracula, there are basically all experts here, and they don't need Bai Yue to do it, and the cleaning aunt who cleans the house removed the timer in three times and divided it by two, and she is extremely skillful, just like fried shredded potatoes.

In this battle, there were more than 30 people, almost all of whom were injured, and in this way, Bai Yue also chased Huang Haoran and a few people out, trying to find the traces of those attackers.

Chu Yu really didn't have the strength to run, and now his brain is still dizzy, and everyone's voice is special

Big, the facial features basically lost most of their role, and they could only stiffen up and start taking care of the wounded.

Finally settled the people, Qin Beige and Yan Snake walked out of the corridor.

Looking at the mess, the sleepy-eyed brothers were completely confused.

"It's... What's wrong?" Looking at the wounded soldiers all over the ground, Yan Snake was startled: "Damn, how long has Lao Tzu been asleep, the end of the world has come?"

After Chu Yuyan explained succinctly, Qin Beige ran out with the wooden sword, and as for the flame snake, he stayed behind and secretly said that it was a pity that he did not participate in the battle.

Dracula's injuries were severe, as if every pore on his body was bleeding, and his seven orifices were also bleeding, and he was lying motionless on the ground after smashing the sonic weapon with a punch.

There are many doctors here, and after a general examination of the body, they shook their heads slightly at Chu Yu: "The internal organs are displaced, and the body is bleeding profusely, although there is breathing, but at most it can only hold on for three moments." ”

After speaking, the doctor sighed slightly.

If it weren't for Dracula, no one would have survived here, including Qin Beige and Flame Snake, who had just fallen asleep.

Weaponized infrasound, capable of penetrating at least fifteen centimeters of concrete and even tank steel plates, is still in the complex, where there is no hiding but death.

Dracula is everyone's lifesaver, but unfortunately, his life is short.

After learning about Dracula's situation, Chu Yu was relieved and said that he knew.

He's not a doctor, but he knows Dracula.

He knew very well that as long as Dracula was there, he would never hang up, so there was no need to worry about it at all.

After a while, Bai Yue came back with a gloomy face, and at a glance, he knew that he was chasing, and Qin Beige also returned in vain, and the sound of a helicopter's screw came from the sky, Chu Yu finally put his heart down, and today he finally escaped completely.

Lao Feng, who had been taking care of Sun Hu, crawled over, lowered his voice and said: "Although that woman is wearing a mask, I recognize the voice, contact us, the representative of these wealthy families, it is her!"

(End of chapter)

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