Zhang Tianhe's knee-jerk reaction was to use a sonic cannon to bombard this thing outside, no matter what it was-in fact, his order was blind, and afterwards he explained to Shi Kening that compared to the particle cannon neutron cannon, the sonic cannon is less lethal after all, and we Martians are civilized people, and it is not suitable to kill people as soon as they come up. In fact, he also realized that if a creature or spaceship can evade all the detection methods on their landing craft, then using other weapons may not necessarily work, and it is always a bit of a mistake to shoot in the dark in the face of an enemy who doesn't know what it is and doesn't know the direction - it's a bit like the kind of person who has no courage at all enters a dark cave, and when he hears the slightest movement, he pulls out his gun and fights indiscriminately, and there is no starter - the starter is a dialect of the ancient Chinese capital, which means that a person can't hold his breath, babbling, For example, if a girl goes on a date with you, and you arrive at the place two or three hours in advance to wait, it is typical of not having a starter.

Mars technology starts from the atomic energy level, all whether it is a neutron cannon, particle cannon is developed from nuclear energy, at first the star was not prepared to carry a sonic cannon, as mentioned earlier, this kind of thing is used by the Martian police on duty, theoretically speaking, it can also be used as a means of killing, but if you have a neutron cannon you can hardly use this kind of low-efficiency physical force thing - like choosing between a machine gun and a bow and arrow, people will choose machine guns, lethal and easy to operate, A three-year-old child can kill someone if he carries it, so the main cannon of the Star does not have such a thing as a sonic cannon, and it is not needed in space. However, at Zhang Tianhe's request, several landing craft on the Fanxing are equipped with sonic cannons, which are quite troublesome to install, because according to Zhang Tianhe's imagination, this cannon is used in places with air, water or other solid media, and the way of sonic killing is actually physical force, in other words, resonance, many bizarre deaths on the earth are because infrasound resonates with people's brains or hearts - it is conceivable that this kind of thing is a joke in the eyes of Mars technology. It's useless and troublesome: Zhang Tianhe's meaning is that the sonic cannon is not a destructive weapon, but more like a deterrent weapon, he requires a landing craft as big as an ancient rocket arrow that can emit sound waves that are enough to shock all directions, just a very strange request, and it is also very complicated to install, so only a few landing craft have this technology - Zhang Tianhe said that it was just in case, but he didn't expect it to be used so soon.

In his imagination, the sonic cannon should be used to expel or paralyze, for example, when they arrive at Titan, they want to go to see those methane lakes, and if there is any mess in them, they can turn on the sonic cannon, like the ancient times in the rivers of electric fish, and put them all down with one shot, and let them float up on their bellies. Therefore, these landing craft equipped with sonic cannons have a special mezzanine, which is set aside to emit and amplify the power of various frequencies of sound waves, infrasound, ultrasonic waves or microultrasonic waves, which are larger than those pig's noses without sonic cannons - so you can't install them all, it's too wasteful, after all, most of the Star's operations should be in space, and sound waves can't travel out in space.

For the risk of landing on the earth, everyone's main prevention direction is radiation, when the depth of more than 5,000 meters is already very small, so people's attention naturally turns back to the biological aspect, if you can find any complex creatures, this trip is not in vain, pick up a fish and go back to see it is excellent. No one expected an attack, and as mentioned earlier, the radar on the landing craft was very powerful, and at this time, a shell within a radius of several hundred meters could be detected, but it didn't notice that something was so close, and it immediately attacked.

Most of the people on board were scientists, and at first the rattling and rattling sounded like the landing craft was being caught by something huge, and then it kept gnawing on the shell of the landing craft with its sharp teeth, which was a creepy sound. The landing craft is twenty meters tall and twelve meters wide, and after the sonic cannon is installed, it is fifteen meters thick, it is like a kind of sunfish on the earth in the past, it looks stupid, and the two large pig nostrils on its head are particularly conspicuous - in other words, this guy feels a little bad aesthetically, belongs to the cute airship, looks a little cute, but no one can stand it when the cannon is fired. It weighs 300 tons, and there is no creature found on earth that weighs more than a pig's nose, but now the feeling of the people in the boat is that it is being held and gnawed, and the sound of a spoon picking at the bottom of a pot sounded throughout the landing craft, and it was dragged around by the big guy outside. Everyone covered their ears and looked frightened.

Skuning, a former veteran of serving in space, was the first person on the boat to react, instinctively covering his ear without a communicator, turning on the safety of the sonic cannon and pressing it. Sonic cannons are not like other guns on the boat, in fact, the energy of the neutron cannon and the particle cannon comes from the engine of the landing craft, and the cannon is just to export the particles from the engine in different ways and then launch them. But the sonic cannon has always been idle, and it's hard to imagine the use of a spaceship with it on it, so it needs to be charged before it can be fired. And the sonic cannon is not directional, as mentioned earlier, it is not necessary to install a positioning system for this weapon that the Martians do not look up to, so the pig's nose launches the sonic wave cannon with it as the epicenter to emit sound waves of various frequency bands in all directions, and this pulsed wave can hit all living creatures within a few kilometers around it in a short time.

The sonic frequency band in which a person and a fish are killed is not the same, a frequency may directly beat people stupid but is useless to a fish, the basic parameters of the sonic cannon on the landing craft are set according to the frequency of beating people stupid, because the biggest threat in the minds of Martians is the earthlings, and it is the most ideal effect to beat them to cerebral paralysis, and then you can catch the captives, catch them back and hang them and fight slowly. In fact, this weapon was developed in the age of the earth, but at that time, this thing could only kill people, not stun, and there was a danger that it was likely to hit oneself if it hit others. In addition, the infrasonic wave is extremely penetrating, and it is likely to cause resonance in the earth's crust to produce some unpredictable earthquakes and volcanoes, and this kind of weapon is inhumane - in the past, the earthlings' perception of weapons was still stuck in Pan Jinlian's kind of half-pushed and half-truthful hypocrisy, that is, all weapons designed for the human body are considered inhumane, such as neutron bombs, infrasonic bombs, biological and chemical weapons, genetic weapons, such weapons have no other use than killing the human body, so everyone does not use them very much- It's like a physical, chemical, and atomic bomb, and they built it to do something else, and then they went to blow people up...... However, it is true that some scientists in the former Soviet Union used nuclear bombs to build canals, dig artificial lakes, and plug leaking natural gas tunnels, but they were all piggybacked, and the ultimate use of this thing was more than when it bombed people.

As for the Martians, killing other humans is the last option for them, and they can control the frequency of infrasound waves in the paralyzing range, just like controlling the power of neutron cannons and particle cannons, and the sonic cannons on the pig's nose are fired at this frequency.

The effect was immediate, and after several pulses of such sound waves, it was obvious that the things outside were frightened or killed, and the landing craft immediately calmed down, and everyone withdrew their hands to cover their ears and looked at each other in horror.

"Captain, what now?" Shi Kening asked.

"Lift off first, come up and talk about it." Zhang Tianhe replied, and Shi Kening began to pull up the landing craft and float up from the sea. Then Zhang Tianhe called Shuermi, who was originally at the bottom of the Fanxing to direct other boats to cover up, and of course he also saw what happened.

"Guess what?" Zhang Tianhe asked him.

"No matter what it is, it's photoelectric and invisible, you can't see it, you can only touch it. Since sound waves are useful, it means that they are not invisible to sound waves, and we can have people make a sound radar on the spot, and then go down to find it to see where it is sacred. Although Schulmi tried his best to show indifference, his eyes lit up when he talked about such things as war, some people liked to farm, some people liked to fly, and some people liked to engage in politics, and Schulmi liked to fight, which was purely a personal hobby. As soon as there is such an activity, he is always very excited, and the first one wants to rush forward.

"Commander Shu, control yourself, we are here to probe, not to suppress bandits, we don't know what is below, this is not in the orbit of Mercury, facing several teams of Mercury bandits, rush up and fight it...... You make me think about it. Zhang Tianhe said as he turned his mind quickly, and at the same time remembered the situation when he used to do peacekeeping work with Shuermi, "Optoelectronic invisibility...... Can rush to the side of the landing craft...... Teacher Zhou! Teacher Zhou! What do you think? ”

When Zhou Limin was needed, Zhang Tianhe respected him very much, and sprayed feces on him when he had the opportunity later.

"Theoretically speaking, electromagnetic stealth can be done, after all, electromagnetic force is a wave, and we can also achieve a certain degree of electromagnetic invisibility, but there is a limit, it is difficult to make an electromagnetic stealth field for something as big as a landing craft, it is impossible to absorb all electromagnetic waves, but it is not completely impossible to do it......" Zhou Limin began to speak, he relieved himself from the shock just now, but he felt even more shocked as he spoke, "But how does light stealth do it?" You know, our photonic radar has developed to an extremely sophisticated level, and I can't imagine anything else that can evade our photonic radar except for black holes and neutron stars......"

"Yikes! I don't believe it! I say that a thing, which is neither a black hole nor a neutron star, is not so ferocious, it can not reflect photons at all. ”

"What?" Zhou Limin raised his eyebrows.

"Dark matter!"

“…… You're a layman who doesn't understand physics, and you're raising the bar here...... If dark matter could act on our landing craft like this, rocking it around, the apparent universe would have collapsed long ago, and it would be your turn to talk nonsense here......"

"I'm just mentioning a possibility, what are you anxious about...... So what do you say is attacking us? ”