On a normal day in 1986, several people were working on an ordinary farmland in France. But these farmers did not show any signs. Suddenly, they couldn't get up. After being discovered by others, they found that they were dead.
and afterwards, they had no signs of poisoning or fighting, so how could they die so bizarrely?
After investigation, the truth of this tragedy emerged. It turned out that in a laboratory dozens of kilometers away from this farmland, a scientist, Gavreo, who was then known as the "father of Sound Weapon ", was secretly conducting a sonic weapon experiment.
This laboratory is not known to ordinary people, but unfortunately, a laboratory staff member did not take defensive measures to let the indoor infrasound leak, which accidentally hit the farmers and caused a tragedy.
After the sound wave weapons entered people's vision, they were also called "invisible killers" and were widely used in the military field. Has this weapon of "killing invisible" been used in our country? How are the invisible and intangible things like
sound wave tanks in the game
sonic weapon principles
sound waves, such as invisible and intangible, used as weapons?
First, let’s introduce what sound waves are. When an object vibrates, it will make a sound. And sound travels in the medium in the form of waves.
Then we have to divide two professional concepts. That is: frequency and amplitude .
frequency represents the number of times a sound wave vibrates within one second. The unit is Hz . In the picture, the area between the two red dots is repeated once. If a sound wave undergoes such a process within one second, then the frequency of this sound wave is 1 Hz.
sine waveform (but there are many sound waveforms. It is just a convenient explanation here)
. According to the hearing range of the human ear, the frequency of sound waves that we humans can hear is about 20 Hz-20000 Hz. Of course, it will vary due to individual differences. Then, we call sounds below our hearing range infrasound, and those that exceed our hearing range are called ultrasonic .
Then let’s talk about the amplitude, which refers to the maximum value that the physical quantity of vibration can reach. That is what we commonly call the sound. In sound, we have a unit that represents the amplitude called decibels.
bat is the one that uses ultrasonic echo positioning to distinguish directions
to give a realistic example. You are listening to a song sung by a bass. If you think the volume is too low, it means that the amplitude is not large enough. Turning up the volume will actually increase the amplitude.
. If you sing this song in another soprano, the sound you hear is sharper, which means that the frequency increases.
After understanding these, we can explain the principles of sonic weapons.
Research shows that without protection, if humans hear sounds above 120 decibels, you will feel that the sound is very loud and unbearable, and may even damage eardrum , etc. When the volume rises above 150 decibels, people in this environment will experience rupture and bleeding in the eardrum, lose hearing, and even become mentally ill.
The hazards of different decibels
and have been studied. The vibration frequency of the infrasonic wave is closer to the frequency of the human internal organs or brain, and once it is attacked with high-power infrasonic waves. What does this mean?
For example, once, a team of soldiers walked up a bridge in unison. But unfortunately, the frequency of walking in sync happens to be the same as the frequency of the bridge collapse, and there are also a large group of soldiers, so the bridge collapses directly. This is resonance.
Take advantage of this to emit infrasound waves of similar frequency to human internal organs, and human internal organs will suffer severe pain and even cause death. And the wavelength of the infrasonic wave is very long, so it can avoid obstacles. It spreads far. However, the disadvantage is that it is difficult to control the direction. The effect of high-power ultrasonic waves is similar to that of infrasonic waves, but the emission direction is easy to control, but the killing range is small.
Real-life version "Lion Roar"
On the day of the early 21st century, an American cruise ship sailed on the sea.Suddenly, a group of uninvited guests entered the tourists' sight - a group of pirates carrying bazooka and carrying rifles were quickly approaching the cruise ship. The person who put it on quickly became panic and no one on the ship carried guns and ammunition. It seems that it is hard to escape this time.
Sound wave weapon on the warship
However, just as the pirates were about to board the ship, the crew took out the secret weapon under the command of the captain. It's a "output" against the pirate. I saw the pirate with a painful expression and dizzy face, and suddenly collapsed to the ground. And the pirates who had not yet understood it had been far away by the cruise ship's acceleration.
The weapon used this time is the sound wave weapon. Imagine that this thing is indeed much easier to use. First, if you really put two guns on the boat. Not to mention, how does the shooting level of civilians compare to pirates who make a living by robbing all day long. If you put these weapons on the ship, it is more dangerous, such as having a crew member or who has obtained weapons to hijack the cruise ship. But this thing is different. At the same time, it can attack pirates to gain time to escape. It is also very safe to put on the boat, and no one will take hostages like this. If you are holding a gun and I rush up, I may die, and the hostages will be afraid. But if you use a sound wave weapon, I won’t die if I rush up. Everyone will rush together, and the criminals will be beaten up directly.
In fact, in addition to the United States, our country has also used this weapon in anti-pirate operations. It can be seen that behind the missile launcher of the battleship, the yellow box is the launcher of the sound wave weapon. It can also be used against pirates. When using
, the commander gave the order. Although no shells were flying out, the pirates over there were already feeling great pain.
In addition to dealing with pirates, at the 9th China International Police Equipment Expo held in 2018, domestic directed sound waves drove away police guns also refreshed the media. Traditional riot-proof weapons, although they do not use metal warheads. However, it will still cause irreparable damage to the other party's eyes and other fragile parts. Sound wave weapons do not have these problems.
Of course, we have been studying other infrasonic weapons . For example, installing the infrasonic directional attack device on a drone for testing, obtaining good experimental data.
and there may even be sonic missiles specifically targeting large ships in the future. To achieve the killing effect of the ship is fine, but the person is gone.
If there is a spear, there must be a shield: How do we defend against sound weapons?
However, this is just a conceivable. Moreover, this attack method is not unsolvable. Although both infrasonic and ultrasound waves cannot be heard by people, there are always instruments that can detect them. As for defense methods, there is no lack of them.
Because the principle of sonic weapons is very transparent, no one can innovate in this, unlike many weapons that have extremely high requirements for your technology. For example, hypersonic weapons require your extremely fast reaction speed. electromagnetic weapon requires you to have strong power supply capabilities. The principle of sonic weapons is simple, but the cost of defending against them is actually not high.
and this kind of defense may now be available for everyone. I believe everyone knows that active noise reduction headphones are the case. The principle is to capture the sound waveform of noise. Then, opposite waveforms are emitted, allowing the sound waves to be positive and negatively superimposed and cancel each other out. Although we cannot hear ultrasonic and infrasonic weapons, their essence is still sound waves, and they can also be defended by the above process.
Secondly, if you want to attack targets like warships, ultrasonic waves are basically out of the way, and the attack distance is too close. When you get close, people on the boat can hit you with submachine gun .
It is true that infrasonic waves are highly penetrating and can penetrate the shells of tanks and warships. However, this is because the tank and warship design did not consider defensive sound wave weapons. If the defensive sound wave weapons are taken into account, materials such as the silencer that have strong sound absorption effect, or imitate the inside of the silencer, lend a protective layer to the ship. Your attack may be greatly reduced. Moreover, these measures are not very cost-effective or technically difficult.Otherwise, you wouldn't be able to buy an active noise-cancelling headphone for more than 200 yuan.
There are multiple cavity inside the silencer, which can continuously reflect and absorb sound waves
, it really doesn't work, and there is also the ultimate trick. With the development of electronic informationization in the future, fewer and fewer people on warships will be on the ship. Then, it is not too difficult to keep everyone in a small room, and then directly draw the large room outside to close to the vacuum. Although the cost has risen sharply, it will be done once and for all. Without air as a medium, there are no sound waves, so how can you be a weapon?
, and the sound wave itself propagates in the air at a limited speed. Depending on the temperature, it is about 340 meters per second. This speed is left behind by many supersonic anti-ship missiles . If you want to install the sound wave launch device on the missile for the sake of speed, not to mention how many places the missile has left to remove fuel, seekers, control systems, and other things for you to release the sound device and equipment that provides energy. Is there a possibility that you can kill him with a missile that can directly use explosives and use people and ships.
So sound wave weapons are certainly promising, but they are definitely not invincible, otherwise countries would have been vigorously equipped. However, as a new weapon system, it will definitely play a certain role in the battlefield. But the size of this effect can only be seen.
