According to the battle records of the "Bao Whale", the time when the first pea millimeter was launched was the force point. The time when the boat disappeared from the passive sonar of the "Bao Whale" was the force point, and it was the second point, which means that the boat responded in more than 7 minutes. The active noise interference system on the "Bao Whale" took minutes to start without preparation in advance, because the system response speed was mainly determined by the execution efficiency of the software. The execution efficiency of the software is the main performance indicator, so it can be seen that the active noise interference system of the boat is not worse than that of the "Bao Whale". It is basically at the same level.

If there were no torpedoes fired by the "Bao Dian", the two most advanced submarines in the world would pass by at most.

Because of the heavy anti-submarine torpedo that "don't give up until the goal is achieved", it is impossible for the "Fao" and the boat to "smile and eliminate grudges" to be distinguished.

As mentioned earlier, the basic working principle of "active noise control system". It is very simple. If you trace the root cause, Russian scientists proposed to use coherent technologies to create noise control systems as early as the beginning of the century. In addition, the "voice interference equipment" that has been widely used in the intelligence community also uses the same principle, except that it is not all sounds that interfere with, but only the voice of people.

So, what is the reason why "active noise control system" was not released until the 1900s?

In terms of practicality, there are two main problems, one is computer performance and the other is interference energy source. Without powerful calculations, it is impossible to process the collected sound signals in time, and it is impossible to interfere with the sound signals. "Noise control" itself converts the energy of sound waves into internal energy. According to the principle of coherence, the energy output of the interference source must be completely consistent with the interference object. Because there is a lot of noise in nature, the power of the interference source is amazing. It was not until the large-scale application of neural network computers and controllable fusion reactors that the two major problems of "active noise control system" were solved. It is also so that the "active noise control system" appeared on the submarines designed in the early 1930s.

It can be seen from this that the "active noise control system" has a big flaw.

That is. If the intensity of external noise is too high, the system will be overloaded and even malfunctions.

In the test conducted by the "Bat Whale," this problem is very prominent. Because the output power of the active attack sonar is often calculated in kilowatts, the intensity is very amazing. Therefore, the "active noise control system" cannot deal with the high-intensity infrasonic waves emitted by the active attack produced by the naphthalene.

According to the experience summarized by the "Boss" in the test, it is necessary to avoid entering the active sonar coverage area directly in front of the enemy boat. If it is unavoidable, either accelerate the escape or turn off the "sharp noise control system" and never start the "active noise control system" when the enemy boat uses the active sonar.

The problem is that the strong noise sources encountered by submarines in combat are not only actively attacking sonars.

Not to mention anything else. When a torpedo explodes at a close range, it not only produces extremely violent shock waves. The efficiency of transmitting explosion energy is far greater than that of the air, but also produces high-intensity sound waves of various frequencies. In the test conducted by the "Fuzou., it has long been proved that the torpedo explosion has a much higher impact on the "active noise control system". The impact of the attack sonar is much higher than that of the attack sonar. If the explosion distance is too close, it may even burn the entire kilogram and the system.

There is no doubt that in the face of high-intensity sound waves generated by torpedo explosions, there is no way for the "active noise control system".

Of course, this also broadened the navy's horizon.

Although at the end of the year of Idea, there is enough reason to believe that the United States' research in related fields is far inferior to that of the Republic, the Republic's Navy is preparing for the future. Considering that the United States is also capable of developing an "active noise control system", it has added detection technology for "active noise control system" to the "Baozou" sea trial project.

Because the "active noise control system" can interfere with sound waves in all frequency bands, as long as it can increase the output power and even deal with active attacks on sonars, any passive detection equipment is useless. No, the engineers in the Republic are so unwilling to admit defeat. After proposing several solutions, several young scientists used the principle of scattering sound waves in the medium and proposed the "blast detection method." The principle is very simple, which is to use explosion as a sound source and determine the target orientation by analyzing the transmission, reflection, refraction and other phenomena of the sound waves generated by the explosion in seawater.

Of course, according to the general principles of engineering, the simpler the principle, the greater the difficulty of implementation. Because the sound waves generated by explosions are irregular, and the propagation of sound waves in seawater will be affected by factors such as temperature, salinity, sea current, etc., the prerequisite for the practicality of the "blasting detection method" is still a computer with super-performance.

Mu Yong doubted that the computers on the "Baohan" are considered first-class among all submarines.

Entering four, one pound of "Fu Zuo". The main test homework is to verify the effectiveness of the "blasting detection method", because it is an effective means to achieve "passive detection". With the gradual popularization of "passive radar, in the foreseeable future, the navy's underwater detection technology will also enter the "passive era." Although in the long run, the use of various natural sound waves is the fundamental to achieving passive detection, in the initial stage, we must find some tricks to lower the technical threshold. Because the sound wave source required for the detection target is placed outside the submarine, the "blasting detection method" is such a trick.

When heading to the Indian Ocean to participate in the joint exercise, the "Baozou" tested the "blasting detection method"

It's simple to say. Use the passive sonar on the submarine to receive external noise, and then a central fire control computer comprehensively analyzes the noise, and finally draws the surrounding underwater situation chart, and then compares it with the situation chart collected before.

The test results were not very ideal, nor were they very bad.

At least one thing is certain. That is, the "explosion detection method" is operable, and what is lacking is a more sensitive passive sonar and a more powerful central computer.

It can be seen from this that when eight torpedoes look for targets in the sea, the situation of the "Bao Guess" and the boat is in a bad situation.

The "Atlanta" class escaped at the fastest speed. The four intestinal millimeter heavy torpedoes have accelerated to Najijie. After losing their target, the simmer millimeter heavy torpedoes also turned to the "Atlanta-class attack submarine.

A few minutes later, the Tianmm heavy anti-submarine torpedo used to deal with the boat failed to find the target, and activated the autonomous search system and pointed the finger at the Atlanta-class attack submarine. In other words, the submarine and the eight torpedoes were sprinting, making the noise very huge, which made the active noise control system of the "Bat Whale" a little unbearable.

After ordering to cut off the torpedo wire, Xiao Jingbo made the "Fao Zuo" deeper into the thug's blade.

In the case of extremely complex noise sources, deep diving is not the best way to avoid, especially in sea areas with shallow water depths and unknown seabed terrain, deep diving cannot be easily done. The reason is very simple. The seabed will reflect sound waves, and according to the specific situation of the seabed terrain, a complex sound wave convergence zone is formed, and within the enhanced convergence zone, the sound wave intensity can be enhanced by up to twice. For the "Bat Whale", which needs to avoid high-intensity noise sources, it is necessary to avoid entering the sound wave convergence zone and avoid getting too close to the seabed. Because the active noise control system itself has the ability to test the intensity of sound waves, the submarine's route can be determined based on the measured results.

The problem is, on the Internet, it started.

Xiao Jingbo knew very well that the torpedo could not keep chasing, and it would hit the United States sooner or later

Boat.

However, Xiao Jingbo was not worried.

When a torpedo explodes, the "Bat Whale" must turn off the active noise control system. Similarly, the boat either actively shuts down the system or overloads the system. More importantly, there is an incomplete "explosion detection system" on the "Bat Whale" that can determine the approximate position of the boat based on the reflected explosion sound. As for whether the boat has the same detection ability, Xiao Jingbo is unknown. There is only one thing that can be determined, and the boat will not be much better than the "Bat Whale".

For more than a few minutes, Xiao Jingbo had been calculating the time when the torpedo hit the "Atlanta" was hit.

The knife was divided into Hong. Before the torpedo hit the "Atlanta" class attack submarine in front of the left side of the "Baozhang". Xiao Jingbo ordered the reverse propulsion to slow down. When the "Baozhang" speed was reduced to about 8 knots, he issued an order to turn off the active noise control system.

Eight heavy anti-submarine torpedoes exploded one after another, just like dropping 8 flares in the sea.

When the Atlanta-class attack submarines were successively blown to pieces by licking torpedoes, the "Bat Whale" also discovered two suspicious targets with the "Explosion Detection System".

I have to say, "The situation of the Batsou is really bad.

If Xiao Jingbo is in the North Indian Ocean or the Western Pacific Ocean, he is more than 80% sure that he has not yet walked away. However, in the unfamiliar South Atlantic Ocean, there is no accurate submarine terrain data in the database of the "Fuzou", so the data collected after the explosion cannot be compared and analyzed.

The discovery of two suspicious targets surprised Xiao Jingbo.

There is no doubt that there are only two possibilities: one is in addition to the boat, there is an American submarine nearby, and the other is that the boat discovered the "Bat Whale" first and fired a torpedo at the "Bat Guess".

Because the "explosion detection method is not continuous, to obtain the navigation data of suspicious targets, you can only compare and analyze the data obtained several times. The fire control computer of the "Baohan. has been calculating the information intercepted by passive sonar and has no unnecessary computing power, so it is impossible to give the specific situation of the two suspicious targets in time, and it is impossible to determine whether it is a slower submarine or a thug high-speed torpedo.

Computers are useless, everything depends on the captain's brain.

In the midst of lightning, Xiao Jingbo made the decision to save all the officers and soldiers of the boat: activate the active noise control system and dive at full speed.

More importantly, the active noise control system on the "Faozou" is ready to be activated at any time.

The "Bao Guess" accelerated its dive shortly after it accelerated. The torpedo launched by an American submarine exploded on the original thug line, only a few hundred meters away. If Xiao Jingbo did not quickly and decisively issue the order to dive at full speed, it would not have changed the route of the "Bao Zuo., even if he would not be hit directly by the torpedo, he would have suffered severe damage.

In fact, even if the dive was accelerated and the torpedo was avoided, the "Fauhan" was severely affected.

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Because the explosion distance is too close, the active noise control system on the "Baohan" was seriously overloaded. Xiao Jingbo had to reduce the speed of the submarine to below 4 knots and then turn off the active noise control system.

It can be said that this sudden attack awakened all officers and soldiers, including Xiao Jingbo.

The officers and soldiers of the "Baozou" have always believed that they were serving on the most advanced submarines. Among the active submarines, none of them were the opponents of the "Baozou". The torpedo that exploded hundreds of meters away was a loud slap in the face. The officers and soldiers of the "Baozou" told the "Baozou" that the "Baozou" was indeed very advanced, not unique, nor incomparable. At least one submarine has considerable strength.

Xiao Jingbo was still very calm because he had to calm down.

It didn't take much effort, Xiao Jingbo thought that the torpedo launched by the boat proved that the boat not only had the active Jianshukou Sikong Sikong, but also "King Li," Huang Li said that the Yakong system had similar "explosion detection system" to "spun source detection thugs. Otherwise, it would be impossible to find the "Bat Whale" in a noisy environment and determine the "travel" of the "Bat Whale". Although from the point of the torpedo explosion, the boat's detection system was not accurate enough, and it was deviated by hundreds of meters when calculating the route of the "Bat Whale". In addition, the boat did not find the following "Bat Whale" before, proving that its passive detection system was not very reliable and could not work continuously, but what could be proved was enough to make Xiao Jingbo believe that the performance of the boat was not below the "Bat Whale", and in some aspects it even exceeded the "Bat S".

After thinking a little, Xiao Jingbo had reason to believe that the torpedo was not aimed at the "Faozou".

Not to mention whether the American submarine will waste expensive torpedoes, the boat is obviously the most advanced submarine in the United States. It is also a submarine in the testing stage. The US Navy sent it to the South Atlantic to deal with the Republic's Navy. It will definitely equip it with an excellent submarine like the Republic's Navy. Change the position and let Xiao Jingbo command the boat. He will never blindly launch the torpedo until he cannot ensure that his opponent is killed. Obviously, the torpedo has a different idea. What Xiao Jingbo can think of is that the boat's passive detection system is like the "Bat Whale", and needs to rely on the sound waves generated by the explosion to detect potential submarines.

You should know that the previous explosions were far away from the "Bat Whale" and their effect was not very obvious. In order to reverse the situation, the captain of the boat would definitely use the intercepted torpedo information to calculate the torpedo launch point, and then judge the "Bat Whale." that may be taken to evade the route after launching the torpedo, and then launch the torpedo. It has to be admitted that the American captain was very lucky, or Xiao Jingbo's tactics were too conservative.

Anyway, the "Bat Whale" has very bad luck.

After about a minute, Xiao Jingbo breathed a sigh of relief.

At this time, the officers and soldiers of the "Bat Whale" were still very nervous, and no one relaxed like Xiao Jingbo.

In fact, the most dangerous old minutes have passed.

After not being attacked within this old minute, Xiao Jingbo had reason to believe that the boat's active noise control system was also severely overloaded due to frequent explosions and had stopped working. More importantly, the boat definitely did not occupy the most favorable position, otherwise it would not remain silent.

In other words, both sides have returned to a state of equal strength.

From another perspective, there is reason to believe that the "Bat Lock" is in a favorable position.

In any case, the "Bao Lock" is a mature submarine that not only has independent combat capabilities, but also has the ability to travel to the South Atlantic Ocean. Judging from the performance of the boat, its condition is similar to the "Bao Lock" that the thug was a year ago, and does not have complete combat capabilities.

The key is here.

As long as the boat does not have complete combat capabilities, without the cooperation and cover of other submarines, it is definitely impossible to wait patiently for a few days, or even a few days like a real submarine, waiting for the opponent to make a mistake, and then kill the opponent in one fell swoop. There is no doubt that the "Fao" has this pound. The capital, the fresh vegetables and fruits stored in the fresh-keeping and frozen food cabinet are enough for the entire boat officer and soldier to consume Gutian. Before this, there is no need to consider floating on the Shanghai surface.

Xiao Jingbo had reason to believe that the boat could not stay under the sea.

He also had reason to believe that the captain of the boat must understand this truth.

In other words, after the counterattack failed, the captain of the boat would choose to retreat. Because before the fire exchange, the boat had turned southwest, according to Xiao Jingbo's estimate, the boat would not retreat directly to the southwest, but would choose to approach the Cavaliers Island, meet with other American and British submarines in that direction, then turn north and return to the United States or US military bases. Therefore, when re-setting the route of the "Bat Whale", Xiao Jingbo chose the "safetest" southwest route.

When sailing in 4 chasms, the noise from the "Bat Whale" is less than decibels, which is very safe

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For the next few hours, Xiao Jingbo was guarding the command center, while the electronic officers of the "Bat Whale" were busy repairing the damaged active noise control system.

The longer the time passes, the safer the "Baohan" will be.

Because the two submarines that fled each chose the same route and the same speed almost did not exist, as long as they were a little patient and within a dozen hours, they would be safe from the enemy boat.

However, including Xiao Jingbo, many officers and soldiers of the "Fu Zuo" did not expect that the qi would be so bad.

After sailing for an old hour, at around 7 a.m. on the battlefield time, I felt that the distance had been widened and I would not be discovered by the boat, Xiao Jingbo made the "Baobao" rise to a depth of wumi on the sea. He extended the communication mast out of the water and used a laser directional communication instrument to send out the news that he fought with American submarines, sinking two "Atlanta-class attack submarines, and encountering boats.

Xiao Jingbo did not choose to use communication buoys. First, the transmission of communication buoys will produce noise, and second, the information capacity of communication buoys is very limited. After just encountering an opponent with equal strength, Xiao Jingbo was more cautious and did not want to make a slight noise.

It can only be said that the "Fao Jing" should not be defeated.

If the laser directional communication device does not have a very large bandwidth and the efficiency of transmitting information is very high, it will send out the message that takes minutes to send with a high-frequency antenna in less than a second. Otherwise, the "Fao Zuo" will be hit by a sudden torpedo before it has been reported.

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That's why when the Submarine Command forwarded the information he had just received to Pei Chengyi, the "Fu Zuo" was diving at the maximum speed to avoid the sudden emergence of heavy anti-submarine torpedoes.
Chapter completed!