Chapter 337: Acoustic diffuse reflection coating

From the time this "Ohio-class" strategic nuclear submarine began to explore the submarine cable, their end was doomed.
The "South Heaven Gate" project is absolutely confidential. Anyone who wants to explore the truth will be devastated by Origin.
Of course, this is only relative to the ships of other countries, because they will not be under their control at all.
If it is Huaxia's ships and ships, Origin does not mind using others to be more gentle, misleading the other party and minimizing the possibility of self-exposure without losing ships and personnel.
But this way, there are still certain risks.
On the return journey, Ye Fan drove towards the South China Sea at a speed of 300 knots in the underwater submarine that originated. Ye Fan was also preparing to return.
Along the way, through the messages displayed on the display screen, Ye Fan can also clearly see that there are intelligent robots coming and going along the way, and submarines are constantly carrying materials and liquid metal plates.
Such a large-scale subsea project can be hidden for such a long time before being discovered by the "Nautilus" strategic nuclear submarine. The concealment is already very strong.
After all, the ships and submarines that come and go do not go to the seabed to scan the seabed all day long, they are just to explore the underwater hydrological data and terrain information nearby.
It is precisely because of this that the submarine moving on the seabed at a speed of 300 knots and the submarine cable for communication will be detected.
Why use submarine cables?
Because without this, Origin would not be able to control such a huge underwater robot, as well as a dozen submarines of the Steel Corps.
The submarine cable is still the main road, and the small antenna that the giant signal tower looks out of, only uses satellite signals to correct for packet loss and delay.
Without this cable, not only a small antenna is exposed on the water, but the entire signal tower the size of a buoy that detects waves, completely exposed on the sea.
It's hard not to be discovered this way.
"Is there stealth and concealment on the seabed? This is indeed a problem. Today's nuclear submarine can be concealed by an accident. If it is the South China Sea Fleet next time,
During the exercise, I accidentally found it along the cable. That would be difficult. "Ye Fan was also feeling his chin and thinking.
Soon, he opened the system and began to search for the exchangeable technology in the system.
He wanted to find a way to avoid being recognized by sonar on the seabed. After all, the visibility of the seabed is very low, even for a submarine with portholes, the visibility is only tens of meters at most.
Whether you can see the road clearly on the bottom of the sea, the most important thing is to rely on sonar.
After searching for half an hour, Ye Fan finally found a technology that was reasonably in line with the current application, and it was completely made at the current level of technology.
The principle of sonar is similar to the ultrasonic detection of bats. It uses sound waves to scan the front, and uses the echo frequency to determine the distance and orientation of the target. It can also scan the terrain.
With the current technology of Ye Fan, it is possible to build an armor that absorbs sonar, which is the so-called sound-absorbing metal, which can almost completely isolate sound.
Unlike the shield of Captain America, this sound-absorbing metal can only be used for sound insulation, and it can be made by adding some special ores to the liquid metal.
However, if silencing metal is used to absorb all the sonar, it will be easier to recognize.
Because it is very simple, the sonar that is generally emitted will bounce back within a specific time and then be accepted by the passive sonar device.
If it is directly the entire silencing metal, every sonar emitted is absorbed, and things around it will rebound sonar, but only this cable and a specific device will not rebound sonar.
Just like a piece of white paper, the sonar sweeping is like splashing ink. The position and terrain are determined by the different concentrations of ink. The position of the cable is particularly dark, and the other places are light black. Exposed.
If the sound-absorbing metal solution is adopted, the whole piece of paper is dyed white, but only the sound-absorbing metal is white and not blackened at all, so you can see that there must be something underwater. , The same will be exposed.
So Ye Fan found another alternative and a new choice.
【Acoustic diffuse reflection coating】
This kind of coating is like a liquid metal, which can be shaped when it is energized, and its nature is like a sound-absorbing metal, which also absorbs sound waves.
However, this type of acoustic diffuse reflection coating, while absorbing sound, will also transmit the sound to the other end of the coating and emit it again.
In this way, the possibility of being detected by sonar is reduced to a minimum.
But this thing still looks a bit magical, and the exchange price is relatively expensive, reaching 10,000 prestige value.
"This stuff seems to be pretty good, the system, exchange for sonic diffuse reflection coating." Ye Fan said to the system.
"Ding Dong, the exchange is successful, the sonic diffuse reflection coating has been exchanged, consuming 10,000 reputation points, and the remaining 61018 reputation points."
When the voice of the system fell, Ye Fan felt the familiar feeling in his mind. Every time he exchanged something with the system, the system would inject technology into his mind and memory.
This also caused Ye Fan to feel a little dizzy ~EbookFREE.me~ After only a minute or two, when his brain adapts, he can adapt.
After the exchange was completed, Ye Fan skipped the introduction page of the sonic diffuse coating and directly clicked on the more detailed effects.
If the obstacle is compared to a wooden board, under normal circumstances, when sound waves are transmitted to the wooden board, the wooden board will directly reflect the sound waves back after absorbing a certain amount of sound.
If the front and back sides of this wooden board are coated with sonic diffuse reflection coating, then when the sound wave is transmitted to the front of the board, its sound wave will be directly weakened.
That is, through the so-called "diffuse reflection" method, the sound wave is dissipated, making it impossible to bounce back.
At the same time, the back of the board will receive the same signal, and the sound of the same size and frequency will be emitted, still in the original direction, the original track, and everything about the sound is completely unchanged.
When the sound waves on the back of the wooden board are emitted and hit an obstacle, they will be reflected back and reflected on the back of the wooden board again.