The doctor knew that the frequency of the sound that Frank was blowing now was the kind that would make these cats limp. The doctor was amazed at what he had never imagined before that the frequency of sound could have such a subtle effect on animals.

Suddenly, a thought flashed through the doctor's mind, and he couldn't help but be shocked, owed Frank a little, and asked Frank excitedly and eagerly: "Do you want to use your voice against that child?" ”。

Frank smiled and nodded confidently, "You guessed it, after careful research, I found that some of the characteristics of that child are similar to frogs, and the last time I went to your house to observe that child, I found an unexpected detail - do you remember?" At that time, it was about the same time as now, it was just after dark, and there was a lot of frog noise in the pond outside, and I looked at the child's larynx, and I was a little shocked that I could see that the muscles of the child's larynx vibrated with the change of the frog's voice, and although he did not make any sound, I could infer an important message from this alone - the perception of sound by his body organs was very similar to that of frogs. ”

The doctor lived with the child for so long and didn't find this detail, but he didn't expect Frank to be able to observe it lightly, it seems that Frank is indeed an expert, and the doctor has a little more admiration for Frank.

Since the child's perception of sound frequencies is similar to that of frogs, the next step is to find a sound frequency that can make frogs paralyze and weak when they hear it. And then use that sound frequency to deal with that child. The plan looks perfect, but the most important thing is that – how do you find this sound frequency?

Frank seemed to have guessed what the doctor was thinking, and he didn't bother to explain, but pulled out another whistle from the drawer, which was much smaller than the previous two, and had a different shape, and this one was very peculiar: flat at both ends and a drum in the middle.

Then, still without saying a word, still with a mysterious smile on his face, Frank stood up and motioned for the doctor to follow him.

The doctor was a little confused by Frank, but he knew that Frank must have a mystery in it, so he didn't ask any more questions and walked out after Frank.

At that time, Frank had been awarded the title of "knight" by the Queen of England, and he was considered a person of great status, so the place where he lived was a small castle covering an area of dozens of acres. In the north-western corner of the castle, there is a large pond with lush trees and green grass, which is very cool even in the hottest part of summer. For some reason, Frank didn't go anywhere else, but came to this large pond.

Because it is night, the bright moon is in the sky, and the sound of frogs in the pond comes and goes, which seems a little noisy, but it also reflects the silence of the night, and a cool breeze blows, which makes people feel very comfortable.

In the moonlight, Frank took the whistle in his mouth and puffed out his cheeks and blew it. As with the first two whistles, the doctor still did not hear any sound coming from the whistle, but as soon as Frank blew like this, something strange happened: the sound of frogs that had been coming and going suddenly fell silent!

This made the doctor completely shocked! He'd never encountered something so wonderful, it's incredible!

At this time, Frank turned his head and said to the doctor: "Although we can't hear the frequency of the whistle just now, the frogs can, and when they hear it, they are paralyzed and can't make any sound, so we use this whistle against the child."

At noon the next day, the doctor took Frank back to his home, and the two of them were ready to test whether the whistle would work on the child according to the plan agreed on the previous night.

When they went home, the child was playing in the mud in the yard, and he was still reciting words and enjoying himself, and the doctor was not only a little moved when he saw this scene—the child's experience was too strange and too bumpy, otherwise, at his current age, it would be a carefree time. But maybe it's because of his weirdness, which is destined to make him unable to live like a normal child.

Although today's plan is somewhat cruel to this child, in the final analysis, it is still for his good, and how the doctor wants to find a way to "tame" him and transform him so that he can live a normal life.

The two stood four or five meters away from the child, and they did not dare to get close to the child, because if they continued to get closer, they would definitely be attacked by the child.

The two looked at each other, and the doctor nodded to Frank as if he had made up his mind, and Frank no longer hesitated, and immediately took out the "silent whistle" and blew it.

The child, who had been playing well, suddenly rolled on the ground with his head in pain, and the doctor hurriedly ran over and picked up the child—the first time in so many years that he had been in contact with a child so closely.

At this time, the child was already paralyzed, and he lay in the doctor's arms submissively, his eyes blurred, as if he was drunk. It wasn't until noon the next day that the child returned to normal.

From then on, whenever the child showed the slightest sign of aggression, the doctor would blow the "silent whistle", and every time it was blown, the child would be paralyzed, and this state would last for about 20 hours before it could be relieved.

This trick really worked, and the child's inexplicable attack ability and extremely keen vigilance became much weaker. Even his temper has become docile, and the doctor can teach him to read and write at close range.

However, the doctor was not happy because he saw that the child was getting thinner and weaker. The doctor felt very distressed, but for the sake of the child's future, in order for the child to become a normal person, he had to do it.

Because Frank told him that only by repeatedly stimulating the child with this sound frequency could it be possible to eliminate the child's overly sensitive vigilance and aggressiveness, and thus make the child normal.

As a result, doctors feel they have no choice but to do so. But things didn't follow the trajectory that the doctor and Frank had planned, and just about a year after the "whistle therapy" had been in place, the unexpected happened.

One day, when the doctor came home from work, he found that the child was missing, and the doctor didn't pay attention to it at first, but after seeing a note written on the table, the doctor was really nervous and worried.

The note was left by the child, and the words on the paper were very immature, and he simply wrote a few words to the effect of: "Mr. Doctor, thank you for taking care of me for so many years, you are a good person, but I know that I am not a normal child, in order not to cause you trouble, I am leaving, please don't look for me again."

But the doctor still looked around, because he felt that a thirteen or fourteen child should not run too far, but after searching for three days in a row, he couldn't find it, and the doctor really felt lost and painful. After more than ten years of getting along, no matter how weird the child is, for the doctor, he has long regarded him as his own child.

Since then, the child has never been seen again, no one has been born, no body has died, it is as if he has evaporated from this world, no one has seen him again, and no one knows his whereabouts.

Only the child, the dead twin brother, was taxided by the doctor and preserved for medical research.

After listening to the German biologist's explanation, the Israeli combat expert couldn't help but feel a shock in his heart, because he thought of that weird old man from Northern Europe, could it be related to this freak?

Because some of the characteristics of the old man are too similar to those of the surviving freak; The surviving freak, the weird old man of Northern Europe, the similarity between the two is too subtle, could it be that the two of them are the same person? Oh my God, if it is, it's amazing.

What Xiao Lei didn't expect was that he just wanted to ask the Israeli experts what was going on with the people who didn't breathe in the fight, and to his surprise, the Israeli experts had such a magical experience about this matter.

When Xiao Lei asked me to read this email, I was also deeply shocked by the story inside, but this email was not only shocking to us, but also inspired me and Xiao Lei - the strange old man in Northern Europe, and the child that the freak had developed, and the blind man, they were fighting, they could not breathe, and the more they did not breathe, the stronger their attack ability and the faster their reaction speed. Since there are so many similarities, do they have a common weakness: they are both afraid of that particular frequency of sound?

In fact, when we went to Zhao Mansion to explore, Xiao Lei used a whistle that can produce a special sound frequency when dealing with the half-human and half-sheep monster, which instantly made the half-human and half-sheep monster lose its offensive ability.

Xiao Lei said that the reason why he thought of using the "silent whistle" at that time was also because he understood some knowledge of the influence of sound frequencies on animals, and the "silent whistle" he used that time was given to him by a foreign friend when he was training abroad, and it was a kind of whistle commonly used in their country when shepherding sheep.

Xiao Lei felt that this whistle was very wonderful, and the shape was also very cool, so he liked it very much, and always took it with him, after encountering the half-sheep and half-human monster, he suddenly thought about whether he could use this whistle to deal with it, because since some of it looks like a sheep, it must also have a certain characteristic of a sheep. I didn't expect it to be successful by mistake.

But in order to deal with the tall blind man in this way, a whistle must first be found, and it must be the same whistle that Frank used by the pond. Only in this way can the frequency of the sound it emits be effective for the blind man, of course, this qiē is only "possible", and a qiē still needs to be tested in actual combat.