Starting Off Survival With A Small Treehouse

"boom!"

He just casually clicked on the trap floor outside the columnar metal prison. Who would have thought that the whole prison would vibrate!

"Hey!" Ke Ke jumped onto his shoulder twice, yelling in horror, "Hey?! Hey!"

It seemed to sense some danger, and it seemed very panicked.

"What's going on here?!"

"earthquake?!"

"Go back!"

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

But what surprised Xu Xin was that despite such a big movement, the giant worms and beasts in the prison outside did not make any movement.

Even the one or two calls that could be heard from time to time are gone!

They all seemed to be frightened, and they dared not speak out at all.

What exactly is going on?

what happens?

At this moment, something happened on the lit screen.

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

The part he clicked suddenly sags downwards, while the circle around this part begins to bulge upwards, and gradually wraps up towards the middle!

That's right, the ground seems to have opened a big mouth at the part he just clicked, and wants to swallow the things on that part!

Damn it, this ground is indeed alive!

Moreover, it is possible to control the deformation with the pulling force of the screen? !

What kind of creature is this thing? !

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

But at this time, the vibration under his feet became even more violent!

At the same time, he heard a voice.

"——"

A particularly deep and frightening voice came to his ears clearly.

"——"

His brows frowned suddenly, his breathing became a little rough, he felt a little dizzy, nauseous, chest tight and short of breath.

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

"——"

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

So sad!

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

Xu Xin sat down slowly holding the cocoa against the wall.

He opened his mouth and breathed heavily, his breathing was very rapid, his head seemed to explode, and his internal organs seemed to be under attack.

So sad!

Is it the sound? !

What a terrible sound!

The sound came from... underground? !

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

This is... under the prison, that extremely huge creature, what is it calling? !

The limp giant creature that they have stepped on countless times is screaming!

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

Fortunately, on the screen, there was nothing special about the ground outside, it was still very smooth.

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 surrounding gradually calmed down.

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

Coco was lying in his arms, trembling slightly, and let out a muffled sound of "嘤...".

"What happened, Brother Xin?!"

Zhao Xiaochuan rushed into the control room first.

His speed was fast, and he ran back directly in front of those two people.

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

Xu Xin leaned against the wall and stood up, rubbed her head that was still a little drowsy at the moment, hammered her heart that seemed to be half a beat slower than before, and said: "I'll explain when they all arrive, how are you? Did that voice affect you a lot?"

"Sound? What was the sound just now? But just now, I suddenly had a headache and nausea, and my body felt uncomfortable everywhere." Zhao Xiaochuan swallowed a mouthful of saliva, and then retched, "Suddenly felt uncomfortable, and I don't know why... ..."

Xu Xin was taken aback for a moment, and asked, "Didn't you hear the sound just now? It was the sound of some creature."

Shouldn't it?

Even though he had augmented hearing, it was still loud.

Even without hearing augmentation, they should be able to hear sounds of that size, right?

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

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

"Well, it's just... Sudden discomfort?"

Xu Xin took a light breath.

This voice must be real.

As for the voice, only he can hear it, but Zhao Xiaochuan didn't hear it...

He probably knew why.

Probably because this kind of sound is something that ordinary people can't capture under normal circumstances.

Infrasound!

Infrasound refers 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, even expanded his hearing frequency range!

This led to the fact that he could hear this kind of sound, which should not be caught by human ears no matter how loud it is!

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

Infrasound waves of a certain intensity can stimulate the human nervous system, leading to fear, mania, dizziness, nausea, vomiting, difficulty swallowing, loss of appetite, fatigue, dizziness and tinnitus.

Moreover, infrasound waves of certain frequencies are close 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, and can even cause death when it is dangerous!

At the same time, the frequency of infrasound is low, the attenuation is very slow, and the wavelength is very long, which can bypass some large buildings for diffraction, and some infrasound can even circle the earth for several weeks.

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

This is a very terrifying sound that can kill people invisible.

Unexpectedly, just the sound of this soft big guy under the prison is a killing weapon, and it can pose such a huge threat to them!

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

"It's because I just did it carelessly."

Xu Xin rubbed Ke Ke'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 it is normal for these underground creatures to look frightened.

They were locked in the prison, and they couldn't run around. They couldn't do anything except tremble and pretend to be dead.

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

"What happened?"

"Xu Xin, did you touch some button? Hey, why did the screen turn on?"

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

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

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

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

Fortunately, the people present were not ordinary people. Moreover, the metal prison also blocked most of the sounds, so the few angry cries just now did not have much impact on the people present.

After recovering, it was just a little uncomfortable.

"Let's go out and have a look, 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, is all because of this big guy below!"

"Is...isn't this a bit scary...?" Wang Lei swallowed, looking straight at the soft ground below.

"Shouting alone 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.

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

The four of them looked at each other in blank dismay.

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

This place is too dangerous!

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

"Hey..." Ke Ke regained his strength at this moment, lifted his little head from Xu Xin's arms, glanced at the ground below, buried it back, and called out in a muffled voice, "Hey!"

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

etc……

Since it's a cry...

Maybe, what does it mean?

"Coco!" Xu Xin held Coco in front of her.

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

Feeling insecure being held up, it struggled immediately: "Which!"

"Can you hear that cry just now, Keke? Does it mean something?" Xu Xin stared into Keke's eyes and asked.

It is possible to understand the words of other creatures, so if there is any meaning in that voice just now...

Ke Ke stopped struggling, her big tail swung twice, her eyes blinked twice, and she nodded her head: "Oh!"

Can really understand it!