Chapter 444: Sound waves with huge lethality!
"Boom!"
He just casually clicked on the trap floor outside the columnar metal prison. Who would have thought that the entire prison would shake!
"Ugh!" Coco ran up to his shoulder twice, shouting in horror, "Ugh?! Uh-huh!"
It seemed to sense some danger and appeared very panicked.
"What's going on?!"
"Earthquake?!"
"Go back quickly!"
In the corridor outside the door, the voices of Wen Guixin and the others came from deep, and the sound of rapid footsteps sounded.
But what made Xu Xin feel strange was that even though there was such a big movement, the giant insects and beasts in the prison outside did not make any movement at all.
Even the one or two screams that could still be heard from time to time were gone!
They all seemed to be scared and did not dare to make a sound at all.
What the hell is going on?
what happens?
At this moment, something unexpected happened on the screen that lit up.
I saw that the ground around the outside of the prison that he just clicked on, which was originally flat, suddenly deformed!
The part he clicked suddenly sunk downwards, and the circle around this part began to bulge upwards, and gradually wrapped up in the middle!
That's right, the ground seemed to have opened a big mouth at the spot he just clicked, and was about to swallow up whatever was on that spot!
Damn it, this ground is indeed alive!
Moreover, you can actually use screen pull to control deformation? !
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 suddenly closed, and the entire ground quickly returned to smoothness.
But at this time, the vibration under my feet became even more intense!
At the same time, he heard a voice.
“————”
A particularly low and frightening voice clearly reached his ears.
“————”
His brows furrowed suddenly, his breathing became a little heavy, and he felt dizzy, nauseous, chest tight and short of breath.
This was the first time he heard this kind of sound. It was too low and too uncomfortable!
“————”
Xu Xin covered her mouth, resisting the feeling of dizziness and nausea, and reached out to hold the wall.
So uncomfortable!
"Hey!" Coco became even more flustered, and got directly into Xu Xin's arms, trembling.
Xu Xin slowly sat down against the wall while holding Keke in her arms.
He opened his mouth and breathed heavily through his mouth. His breathing was very rapid. His head seemed to explode, and his internal organs seemed to be under attack.
So uncomfortable!
Is it caused by this sound? !
What a terrible sound!
Where does this sound come from... underground? !
...He seemed to have guessed the source of the sound!
This is... the extremely huge creature under the prison, howling? !
The soft giant creature that they had stepped on countless times was screaming!
Its cry was long and low, as if it contained strong dissatisfaction.
Fortunately, on the screen, there was nothing special happening on 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 area gradually became calmer.
Xu Xin rubbed his head, breathing slightly tremblingly, to calm down.
Coco lay in his arms, trembling slightly, and let out a muffled cry of "嘤...".
"What happened, Brother Xin?!"
Zhao Xiaochuan was the first to rush into the control room.
He was very fast and ran back directly in front of those two people.
He looked 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 his head, which was still a little groggy at this time, hammered his heart, which seemed to be half a beat slower than before, and said: "I will explain when they all arrive, how are you? Did the sound just now have a big impact on you? ”
"Sound? What was the sound just now? However, just now I suddenly had a headache and nausea, and I felt uncomfortable anywhere in my body." Zhao Xiaochuan swallowed, then retched, "I suddenly felt uncomfortable, and I don't know why... …”
Xu Xin was slightly startled and asked: "Didn't you hear the sound just now? It was a sound similar to the cry of some creature."
Shouldn't it?
Even though he had hearing enhancement, the sound was still loud.
Even without hearing enhancement, they should still be able to hear sounds of that size, right?
"Ah? What kind of 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...feeling very uncomfortable all of a sudden?"
Xu Xin took a gentle breath.
This voice must be real.
As for the sound, only he could hear it, and Zhao Xiaochuan did not hear it...
He probably knew why.
Probably because this kind of sound is something 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 can hear this sound...
It's because he now has enhanced hearing!
Hearing amplification even expanded his hearing frequency range!
This led to him being able to hear this kind of sound that should not be picked up by human ears no matter how loud it is!
The situation and symptoms they just experienced are basically consistent with the harm of infrasound waves.
Infrasound waves of a certain intensity can stimulate the human nervous system, causing people to experience fear, mania, dizziness, nausea, vomiting, difficulty swallowing, loss of appetite, fatigue, dizziness, tinnitus, etc.
Moreover, infrasound waves of certain frequencies are close to or even the same as the vibration frequency of human organs, so they easily resonate with human organs and are very harmful to the human body. When dangerous, they can even cause death!
At the same time, infrasound waves have low frequencies, attenuate very slowly, and have very long wavelengths. They can be diffracted around some large buildings. Some infrasound waves can even circle the earth for several weeks.
On Earth, sonic weapons are made based on the principle of infrasound waves.
This is a very scary sound that can kill people without being heard.
Unexpectedly, this big, soft guy under the prison could pose such a huge threat to them just by the sound it made, which was a murderous weapon!
"So, what's going on, Brother Xin?" Zhao Xiaochuan's face became slightly better at this time, "It's not just us, the bugs outside are also very weird, huddled in the corner motionless, even those few The giant beast was lying on the ground motionless, as if it was afraid of something.”
"I just did it accidentally."
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 sound just now was that of a giant beast, then it is normal for these underground creatures to look frightened.
They were locked in a prison and couldn't escape. They couldn't do much except trembling and pretending 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 opening screen at a glance.
Wen Guixin immediately walked to the screen and looked at it, then turned to 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, but I’m stunned by the rocket!”
The two people's faces 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 effects are real.
Fortunately, the people present were not ordinary people, and the metal prison also blocked most of the sounds, so the few seemingly angry screams just now did not have much impact on the people present.
After recovering, I just felt a little uncomfortable.
"Let's go out and take 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 finished explaining to them what had just happened.
"That is to say..." Wen Guixin pointed to the soft ground below and said with some disbelief, "The reason for the vibration just now and the reason for our discomfort are all because of this big guy down there!"
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"Isn't this... a bit scary...?" Wang Lei looked straight at the soft ground below and swallowed.
"Just the screams make us... so uncomfortable? Moreover, we are still in the prison. If we are outside and are directly attacked by sound waves..." Zhao Xiaochuan also couldn't imagine it.
The ground below outside has returned to calm at this time, and it is completely invisible. The ground has just deformed and opened a "big mouth".
The four of them looked at each other.
They haven't figured out what they are going to do yet, but the dangers have been identified one after another.
This place is too dangerous!
It is indeed a facility in the underground world...
"Huh..." Keke finally regained his composure at this time, raised his little head from Xu Xin's arms, glanced at the ground below, buried it back, and let out a muffled cry, "Huh!"
Coco probably knew from the beginning that this was the cry of this giant beast.
Wait...
Since it is a cry...
Maybe, what does it mean?
"Coco!" Xu Xin raised Coco in front of her.
"Huh?!" Coco was suddenly lifted up and startled.
It felt no sense of security being held up, so it immediately struggled: "Hey!"
"Can you hear that scream just now, Keke? Does it mean anything?" Xu Xin asked, staring into Keke's eyes.
It is possible to understand the words of other creatures, so if there is any meaning in that voice just now...
Coco stopped struggling, swung her big tail twice, blinked her eyes twice, and nodded her little head: "Hey!"
I can actually understand it! (End of chapter)