The aliens were rescued, but the danger period has not yet passed, and the institute organized 24-hour care to try to save the lives of the aliens.

No way, who let there be too few aliens in the hands of humans!

The institute did its best, but humanity still knew too little about the alien, and seven hours later, the hapless alien died of his heavy duty.

No one cares about the life and death of an alien, but the death of this alien is too inopportune, the news spread, and the entire high-level officials of Beiyuezhou were shocked, Wu Han contacted the research institute as soon as possible to inquire about the details of the matter.

Xu Jiaye told the whole process in its entirety, but he kept an eye on it, quietly exaggerating the significance of studying aliens and reducing the negative impact of alien deaths.

"Don't take it as an example!" Wu Han ended the communication with four words, but Xu Jiaye was secretly shocked into a cold sweat.

Although the above is no longer investigated, but the research institute can't be counted like this, Xu Jiaye immediately called the relevant responsible person to his office.

He really wanted to slap these people on his head, but he, the director, was only an administrative position, and he didn't know scientific research at all, and he had to rely on these big bulls to study aliens, so in the end he could only hold back his dissatisfaction in his heart, and conveyed the dissatisfaction of his superiors in a relatively gentle tone, demanding that there should be no similar experimental accidents in the future no matter what.

Well, that's right, it's an experimental accident!

But several researchers didn't buy it at all, and Professor Lin, who was the leader, unhurriedly took out a report from his arms and put it in front of Xu Jiaye, pushed the glasses on the bridge of his nose and said, "This is the result of our research." ”

Xu Jiaye was a little stunned, staring at Professor Lin for a while, before lowering his puzzled gaze and opening the experimental report on the table.

The report is not long, and the content is very simple, all of which are infrasonic experimental data on aliens, including the infrasonic frequency that killed aliens - 7 Hz!

Although he did not have the ability to participate in research, he had worked in scientific research units for so many years, and he still had the vision, skimming the obscure technical terms, and quickly discovered the most valuable content in the report.

After reading it carefully, Xu Jiaye raised his head: "Are you sure that infrasound waves of this frequency are useful?" ”

"I dare to vouch for it with my head!" Professor Lin said without hesitation.

Xu Jiaye resisted the urge to roll his eyes: "I can't ask for your head, I just want to know the most real situation!" ”

Professor Lin was silent for a moment and said: "Let me tell you this, the infrasound wave of 7 hertz has a great impact on the circulatory system of aliens, as long as the intensity is appropriate, it is not a problem to kill aliens at all!" ”

It's really not a problem, because there has already been an alien who died in the lab, which is the most direct evidence.

Xu Jiaye thought for a while and said, "Then can you be sure that this frequency is useful for all aliens?" Is it possible that this is just an isolated case? ”

"Absolutely impossible, unless other aliens are another physiology, but it's impossible!" Professor Lin said, "All four of our aliens, there are four in the north, and there are many abroad, I have compared the research data of various laboratories, and I can definitely be sure that the physiological structure of these aliens is completely identical!" ”

These aliens come from enemy nests in different regions around the world, and it is impossible for aliens to prepare a batch of special varieties in advance to deceive humans.

Xu Jiaye's focus suddenly deviated: "Isn't it five?" There was also an experimental accident in the northern capital? ”

Professor Lin smiled slightly, raised his palm and made a cutting motion on his arm: "The death of the broken arm is what happened just now." ”

"Oh!" Xu Jiaye was stunned, he thought for a moment and said, "Professor Lin, I must admit that you persuaded me, I will hand in this report, but how can I not intervene from above, do you understand what I mean?" ”

"Understood!" Professor Lin pushed his glasses again, "It's gold that shines everywhere, and I believe my discovery can change the situation of war!" ”

Xu Jiaye tugged at the corners of his mouth: "I hope so!" ”

At the end of the conversation, Xu Jiaye immediately reported the report, and it was directly reported to Wu Han.

Wu Han attached great importance to it, and after briefly reading the report, he forwarded it to Beidu, and Beidu's movements were not slow, and he transferred the report to the laboratory after a while.

Just after the death of an alien, the laboratory directly used the alien's corpse to verify the content of the report, and when the infrasound appeared, the detection equipment immediately found that the circulatory system in the corpse resonated strongly.

The laboratory gradually increased the intensity of the infrasonic waves, and several organs in the corpse also showed abnormalities.

The circulatory system spreads all over the body, and the vibration caused by infrasound waves is like stuffing the whole body of an alien with a vibrating rod.

The laboratory in Beidu confirmed the results of the report, and the excited researchers reported the good news as soon as possible.

Although there have been times when infrasound waves have been used against aliens in the past, this thing is not divided between friends and enemies, and countries have never used infrasound waves as a weapon to deal with aliens.

But this time it's different, since infrasound has such a strong effect, it's a shame to my conscience if I don't use it!

The northern capital quickly issued a series of orders, and major design institutes, research institutes, and military factories quickly mobilized to carry out a comprehensive attack on this research result.

The order of the northern capital was very simple, it was necessary to come up with practical equipment suitable for field warfare, not the kind of defective products that hurt both the enemy and oneself.

This is difficult for designers, infrasonic is too difficult to deal with, people are pervasive, infrasonic is no hole, and it has to be drilled hard.

If it is a defensive war, it is easy to do, it is great to strengthen the fortress building, and paste a few more layers of special materials that can absorb infrasonic waves or reflect infrasound waves, but the requirements of the northern capital are suitable for field warfare.

The first idea that popped up was a directional microwave cannon.

Sound waves can indeed be oriented, but first there must be a material that can restrain sound waves!

Ordinary sound is easy to restrict, the problem is the penetrating power of infrasound, what can block it?

It is not without materials that can block infrasound waves, but these materials must have a certain thickness and cannot be used on the battlefield at all.

Fortunately, there is no endless road, and soon someone thought of the sonic hedging of noise-canceling headphones!

The so-called acoustic hedging is simply that the sound waves with opposite phases and the same frequency cancel each other out, which can achieve the purpose of reducing noise.

Since the intensity of audible sound waves can be reduced, the intensity of infrasound waves can also be reduced theoretically, isn't this the key point to solve the problem?

As soon as this idea was made, the acoustic laboratory began corresponding experiments, and soon came to a positive conclusion: sonic hedging can indeed reduce the intensity of infrasound!

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