Starting Off Survival With A Small Treehouse

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"boom!"

He just casually clicked on the trap floor outside the column-shaped metal prison. Who would have thought that the entire prison would vibrate!

"Hey!" Coco jumped up on his shoulders twice, screaming in horror, "Hey?! Woeeeeeeee!"

It seemed to sense some danger and seemed very panicked.

"What's going on here?!"

"earthquake?!"

"Go back quickly!"

In the corridor outside the door, the voices of Wen Guixin and the three came from the depths, and hurried footsteps sounded.

But what surprised Xu Xin was that despite such a big movement, the giant insects and beasts in the prison outside didn't make any movement.

Not even the one or two cries that I could hear from time to time!

They all seemed to be scared and didn't dare to make a sound at all.

What exactly is going on?

what happened?

At this moment, something changed on the lit screen.

I saw that what he had just clicked, the ground around the outside of the prison that was originally flat, suddenly deformed!

The part he clicked suddenly sags downward, and the circle around this part starts to bulge upwards and gradually wraps up in the middle!

That's right, the ground seems to be in the place where he just clicked, opened a big mouth, and devoured the things on that part!

Damn, this ground is indeed alive!

Moreover, it is actually possible to control the deformation with the screen pull? !

What kind of creature is this thing? !

At this time, the deformation of the soft ground outside the prison suddenly became faster, and in an instant, the big mouth closed, and the entire ground quickly returned to level.

But at this time, the vibration under his feet was even more intense!

At the same time, he heard a voice.

"—"

A particularly deep, terrifying voice came clearly into his ears.

"—"

His brows furrowed, his breathing became a little heavy, feeling a little dizzy and nauseated, chest tightness and shortness of breath.

This was the first time he heard this kind of voice, it was too deep and too uncomfortable!

"—"

Xu Xin covered her mouth, resisting the dizziness and nausea and wanting to vomit, and reached out to support the wall.

So sad!

"嘤嘤!" Coco became even more flustered, and got directly into Xu Xin's arms, shivering.

Xu Xin hugged the reliable wall and sat down slowly.

He opened his mouth and took a big breath, breathing very fast, his head seemed to explode, and his internal organs seemed to be under attack.

So sad!

Is this the sound? !

What a horrible sound!

The origin of this voice is... underground? !

...He seems to have guessed the source of the voice!

This is... under the prison, that incomparably gigantic creature, calling? !

That squishy giant creature that they have stepped on countless times is screaming!

Its cry was long and low, as if with strong dissatisfaction.

Fortunately, on the screen, there was no special situation on the ground outside, and it was still very flat.

However, because the scene on the screen is a simple perspective view of lines, the real situation cannot be seen.

Finally, the sound stopped, and the surroundings gradually became calm.

Xu Xin rubbed her head, her breathing trembled slightly, and she calmed down.

Coco was lying in his arms, trembling slightly, and made a muffled cry of "嘤...".

"What happened, Brother Xin?!"

Zhao Xiaochuan rushed into the control room first.

His speed was fast, and he rushed back directly before the two of them.

His face was pale at this time, and it seemed that he was also affected by the voice just now.

Xu Xin stood up against the wall, rubbed her head that was still drowsy at the moment, and hammered her heart, which seemed to be half a beat slower than before, and said, "I'll explain when they all arrive, how are you? Did that voice just now have a big impact on you?"

"Voice? What was the sound just now? However, just now I suddenly had a headache and nausea, and my body felt uncomfortable everywhere." Zhao Xiaochuan swallowed and retched, "suddenly I feel so uncomfortable, and I don't know why... "

Xu Xin was stunned for a moment and asked, "You didn't hear the sound just now? That is, it sounds like some creature is screaming."

Shouldn't it be?

Although he has hearing enhancement, the sound is still very loud.

Even if there is no hearing enhancement, they should be able to hear sounds of that size, right?

"Ah? What creature is screaming? No?" Zhao Xiaochuan shook his head in confusion, then rubbed his head and said, "I really didn't hear it?"

"But you feel uncomfortable." Xu Xin raised his eyebrows slightly and asked.

"Well, it's just... suddenly uncomfortable?"

Xu Xin took a deep breath.

This voice must be real.

As for the sound, only he could hear it, and Zhao Xiaochuan didn't hear it...

He probably knew why.

Probably because this kind of sound is a sound that ordinary people cannot capture under normal circumstances.

Infrasound!

Infrasound waves refer to sound waves with a frequency of 0.0001Hz-20Hz.

The human hearing range is 20-20000Hz.

This is a sound wave beyond human hearing!

As for why Xu Xin could hear this voice...

It's because he now has hearing augmentation!

Hearing enhancement, and even expanded his hearing frequency range!

That's why he can hear this kind of sound that should not be picked up by the human ear no matter how loud it is!

The situation and symptoms that they have just appeared are basically the same as the harm of infrasound waves.

Infrasound waves of a certain intensity will stimulate the human nervous system, causing people to experience fear, mania, dizziness, nausea, vomiting, difficulty swallowing, loss of appetite, fatigue, weakness, dizziness and tinnitus.

Moreover, the infrasound waves of certain frequencies are similar to or even the same as the vibration frequency of human organs, so they are easy to resonate with human organs, which is very harmful to the human body. When dangerous, it can even cause death!

At the same time, infrasound waves have low frequency, very slow attenuation, and long wavelengths, which can circumvent certain large buildings for diffraction, and some infrasound waves can even circle the earth for several weeks.

On Earth, sonic weapons are made on the principle of infrasound waves.

This is a very scary sound that can kill invisible.

Unexpectedly, this soft big guy below the prison, just the sound of it, is a murder weapon, and it can cause such a huge threat to them!

"So, what's going on, Brother Xin?" Zhao Xiaochuan's face became a little better at this time, "It's not just us, the bugs outside are also weird, huddled in the corner and motionless, even the few The giant beasts are all lying on the ground motionless, as if they are afraid of something."

"I just did something careless."

Xu Xin rubbed Coco's little head, which was still shivering in her arms.

The behavior of the underground creatures in the prison coincided with his guess.

If the voice just now was the voice of a giant beast, then the fear of these underground creatures is also normal.

They were locked in a prison, and they couldn't run away, and they couldn't do anything other than shiver and pretend to be dead.

At this time, Wen Guixin and Wang Lei also arrived.

"What happened?"

"Xu Xin, did you touch any button? Hey, how did the screen turn on?"

The two walked into the control room and saw the open screen at a glance.

Wen Guixin immediately walked over to the screen and looked at it, then turned to look at Xu Xin and asked, "So, what button did you click just now? I almost thought that this prison was going to be launched like a rocket. I'm dizzy rocket!"

The faces of the two were also a little pale. After all, they were also affected by the few infrasound attacks just now.

Although they can't hear the sound, these influences are real.

Fortunately, the people present were not ordinary people, and the metal prison also blocked most of the sounds, so the few sounds just now seemed to be angry shouts and did not have much impact on the people on the scene.

After recovering, it was just a little uncomfortable.

"Let's go out and see, and I'll tell you as we go."

When they walked out of the passage and looked down at the soft ground outside, Xu Xin had already explained to them what had just happened.

"That is to say..." Wen Guixin pointed to the soft ground below, and said in disbelief, "The reason for the vibration just now, and the reason for our discomfort, are all because of this big guy below!"

"This...isn't it a bit scary...?" Wang Lei looked straight at the soft ground below and swallowed.

"Just the sound makes us... so uncomfortable? Besides, we are still in the prison. If we were outside, we would be directly attacked by sound waves..." Zhao Xiaochuan couldn't imagine it.

The ground below the outside has returned to calm at this time, and it is completely invisible. The ground has just been deformed, and a "big mouth" has been opened.

The four looked at each other.

They still haven't figured out what they are going to do, but the dangers have been figured out one by one.

This place is too dangerous!

As expected of a facility in the underground world...

"Hey..." Coco recovered at this moment, raised his little head from Xu Xindi's arms, glanced at the ground below, buried it back, and cried out in a muffled voice, "Hey!"

Coco probably knew from the beginning that this was the cry of this giant beast.

and many more…

Since it's a scream...

Maybe, what is the meaning of UU reading www.uukanshu.com?

"Coco!" Xu Xin held Coco to the front.

"Huh?!" Coco was suddenly lifted up, startled.

Being held insecurely, it immediately struggled: "Hey!"

"Can you hear the cry just now, Coco? Does it mean anything?" Xu Xin asked, staring at Coco.

If you can understand other creatures, if there is any meaning in the voice just now...

Coco stopped struggling, wiggled his big tail twice, blinked his eyes twice, and nodded his head: "Hey!"

You can really hear it!

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Chapter 443 The lethal sound wave! Free to read. https://