Gong Er is too familiar with the voice of the giant tortoise, as early as in the JZ gathering area, after the giant tortoise was promoted to the quasi-third level, he roared in front of everyone, and that voice almost scared his soul away, and now this guy actually roared again. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo

With the roar of the giant tortoise, first of all, its body, slammed down, and if you look closely, you will find that the zombies that were pressed under the giant tortoise have been completely destroyed in an instant, and the dead zombies can no longer bear the weight of the giant tortoise, which causes the giant tortoise to sink.

The sinking of the giant tortoise is like a boulder thrown into the water, and the zombies around it, like the ripples that stir up, spread outward in a circle, and every time it expands, there is a circle of zombies planted to the ground, and as time goes by, more and more zombies are planted.

"Infrasound, it's an infrasonic attack, it turns out that this is its strongest means of attack! It's not good! Order the troops to retreat, this is an indiscriminate attack!" Wang Lei was overjoyed at first, and then hurriedly let the troops retreat.

Because at this time, there are more and more people who come to the mountain to see the excitement, and even many adventurers also ran over, wanting to witness the battle style of the "Xuanwu Divine Beast" up close, Wang Lei is not sure of the attack range of the giant tortoise, in case he kills the soldiers on his side, it will not be a disaster.

However, the speed of sound propagation is extremely fast, and it is not at all that it can be withdrawn, and even if you know the danger, it will not help at all.

The first to have an uncomfortable reaction was the nearest few adventurers, these people relied on themselves to be first-level evolutionaries, and felt that even if the zombies surrounded them, they could run away, in order to see clearly, the place they chose was only nearly a thousand meters away from the location of the giant tortoise, and from the mountain where they were, more than ten meters away, there were even a few first-level zombies wandering.

As a result, not long after the sound came out, several people experienced symptoms such as dizziness and vomiting.

Seeing that the situation was not good, they struggled to escape from the area, and in the end, only one all-rounder and two speed-type evolutionaries escaped, and the remaining four people did not run far, and fell directly on the spot, life and death are unknown.

The area where Wang Lei was located, nearly 2,500 meters away from the place where the giant turtle was fighting, was already within a safe range, and only a few ordinary soldiers who were watching the excitement showed symptoms of dizziness and chest tightness.

After some observation, Wang Lei found that the first- and second-level zombies within five hundred meters of the center of the giant tortoise were all planted to the ground, which should be the strongest attack range of the giant tortoise, as for the third-level zombies or third-level evolutionaries, whether they will die or not, there are no experimental subjects here, so it is not yet certain.

And within 500 meters to 1,000 meters, the first-level zombies are basically wiped out, some of the second-level zombies are dead, and even the living part is as if they have suffered an electric shock, standing in place and twitching unconsciously, this should be the effective attack range of the giant tortoise.

And the four unlucky adventurers seemed to be on the edge of a thousand meters, and they didn't know if they would survive.

As for the 1,000-meter range, the second-level evolutionary is basically fine, and the first-level, or the quasi-evolutionary who has been injected with the virus vaccine, will experience symptoms such as dizziness, tinnitus, vomiting, and chest tightness depending on the length of the distance, which should be the damage caused by the residual aftermath after the giant turtle attack.

Until this time, Wang Lei finally understood why no matter how he tempted the giant tortoise, the giant tortoise refused to use its special ability, if this ability was used in the gathering area, how many people would die.

"What the hell is going on? The giant tortoise used a lion's roar before, and we were standing next to it at the time, wouldn't it be okay then?" Gong Er said in disbelief.

"Didn't I say it just now, it's infrasound, the giant tortoise launched an infrasonic ability, in the JZ gathering area, it just roared casually, and it didn't contain infrasonic waves at all, otherwise you would have been like these zombies lying on the ground..........." Wang Lei began to explain patiently.

Infrasound waves can interfere with the normal function of the human nervous system and endanger human health. Infrasound waves of a certain intensity can make people dizzy, nauseous, vomiting, loss of balance, and even mental depression.

When the oscillation frequency of infrasound waves is similar to the rhythm of people's brains and causes resonance, it can strongly stimulate people's brains, and the light ones are afraid and crazy. In severe cases, sudden fainting or complete loss of self-control, or even death.

Before the end of the world, animals such as lions, tigers, and crocodiles were those who could emit infrasound waves in nature.

The most obvious thing is that when human beings hear the tiger roar and the lion roar, there will always be inexplicable fear and fear in their hearts, this is the infrasound wave emitted by the lion or tiger, which resonates with the human brain, and the so-called "lion roar" is actually the use of infrasound waves to fight.

Infrasound is extremely penetrating, not only through the atmosphere, seawater, and soil, but also through sturdy, reinforced concrete buildings, and even tanks, warships, submarines, and airplanes.

In addition, after the giant tortoise mutated, the infrasound waves it emitted were even more powerful versions of the internal force, and it was just a roar, and in less than thirty seconds, it directly destroyed 90% of the zombies.

The rest are just some first-level zombies who are far away, and second-level zombies with strong pressure resistance, and most of the remaining three or four thousand zombies have some difficulty even walking, let alone continuing to attack.

"The giant tortoise has already crippled the zombies, and I ordered everyone to go down and mend the knives, and strive to eliminate the remnants of the enemy within half an hour. Wang Lei instructed Gong Erdao, who was still thinking about infrasonic ability.

The remaining zombies, who were stunned by the giant tortoise, stopped the crazy attack, and then let the giant tortoise clean up one by one, it is estimated that it will really have to wait until the evening, and the purpose of Wang Lei's experiment has been achieved, and the effect is very obvious, so he decided to "collect the credit" in advance.

Everyone walked all the way, and after cleaning up the outermost zombies, Wang Lei began to check these dead zombies, these zombies did not have any scars on the surface, perhaps because they did not have pain nerves, they did not even show a trace of pain, a trace of fear.

It seems to be asleep, and it is the kind that sleeps soundly, unlike the four dead adventurers, whose entire mouth and eyes are crooked, their facial features are distorted, and they are foaming at the mouth, and those who don't know think that these four people are scared to death.

Wang Lei took out the snake bone machete he carried with him, gently cut open the zombie's skull, and found that the brain marrow inside had become a mashed tofu brain, Wang Lei finally determined that the zombie was not asleep, but completely dead.

"This brain, it's like lighting a cannon and blowing it up inside, the infrasound is really powerful!" Gong Er sighed.

The further you go in, the more zombies die, and many zombies even have beige sticky substances flowing out of their mouths and nostrils, it seems that these zombies' heads exploded even harder, and Wang Lei didn't need to cut it open to check, he knew that the other party was already dead.

"I feel like it's been blown off by firecrackers. Xiao Yi pointed to a zombie with brains coming out of his nostrils and said.

"Okay, aren't you disgusting, do you think it's popcorn?"

"I didn't expect the lethality of the giant turtle to be so powerful, and some people's little peppers are probably not as hot as the giant turtle!" Gong Er suddenly pointed out.

Earlier, the giant tortoise was not angry, which made him very faceless, but now that the giant tortoise has exploded, Gong Er has the heart to show off.

"The lethality is really great, this feeling is like the ultimate weapon that determines the outcome of the battlefield, but it's a pity that the giant turtle kills indiscriminately, and the next battle, I'm afraid it won't be of much use. Xiao Yi was not to be outdone.

"Why can't it be useful? As long as our personnel are far enough away, I have thought about it, when attacking Jinxian, let the giant turtle roar a few times in the front, we only need to keep a distance of two thousand meters, follow behind and mend the knife, maybe we can easily capture the county seat of Jinxian." Gong Er said on a whim.

His idea is very simple, that is, let the giant turtle enter the city and launch a sonic attack, anyway, the giant turtle has rough skin and thick flesh, and the zombies can't do anything about it, so it's a big deal to stop and rest for a while when you're tired of roaring, and then continue roaring.

"This seems to be a good idea, but in this way, unless you don't have to worry about the life and death of the entire county, all the survivors, according to my inference, in such a large county, there are not a thousand but eight hundred survivors, right?" Xiao Yi asked rhetorically.

If the giant tortoise is really allowed to take the lead, although Wang Lei and them can prevent the indiscriminate attack of infrasound, but the survivors in the county town can't do it, so that Wang Lei's troop casualties are minimized, but what's the point of playing a county town where there are no living people?

If it was before, when Wang Lei's strength was weak and when materials were extremely scarce, for the sake of the materials of a county, Wang Lei would probably be ruthless and implement this indiscriminate attack method.

But now the situation is different, the gathering area has been able to achieve self-sufficiency, although the materials of a county town are attractive enough, but it is not what Wang Lei is currently in urgent need, and now what he lacks the most is population resources.

Don't look at the fact that there are almost 30,000 or 40,000 people in the agglomeration area now, and it is still growing every day, but as the territory gets bigger and bigger, there is always a need for enough people to fill it and produce it!

And he is still just making a small fuss in the county town, and he seems to be strong, but if he really wants to attack a big city with a population of millions, or even tens of millions, these two thousand soldiers are not enough at all, even if he sends ten, a hundred giant tortoises and other powerful mutant beasts, it is estimated that in the face of the sea of millions of zombies, these mutant beasts can be piled to death.

What's more, there are more mutant beasts that are not in the same camp as humans, and there are aliens eyeing each other, and a mutant giant tortoise alone is simply not enough to compete with these powerful enemies.

So in the final analysis, people are the most important thing.

Thinking of this, Wang Lei finally spoke: "The infrasound of the giant tortoise, unless it can be released in a place where the corpse group is particularly dense and the survival rate of human survivors is very small, the rest of the areas cannot be used. (To be continued.) )