Mecha Star Wars.

On the dark sea, a huge patrol ship was quietly cutting through the waves.

When the satellite fell, they could only watch from a distance in a safe area.

Watching the spacecraft, which has gathered the fruits of decades of human wisdom, burn and fall into the sea, the flames light up the sea surface, splashing huge water splashes, and then disappear little by little into the darkness...

Everyone on board felt the sadness of a creature hurting its own kind.

The long row of fireballs looks like an enlarged version of waterfall fireworks.One by one, human modern scientific and technological civilization is brought to the bottom of the sea.

Because the fall area was the sea, they didn't need to fire.

Compared to the vigorous confrontation on land, it can be said to be desolately quiet on the sea.

After all the satellites disappear, ships on the sea will still patrol around. Each dispersed to deal with emergencies on the sea.

After receiving the news that the spacecraft was approaching the border, the captain notified all crew members of first-level combat readiness.

On the sea, the moonlight is not bright enough. The small ship advanced in the boundless sea.

Unconsciously, the calm sea became rippled.

The fish were roiling, at first only a few, but later the movement was so loud that even the observers on the ship could not ignore it.

The captain quickly received the first officer's notification. "Captain, you'd better come over and take a look, there's something strange in the water."

When the captain rushed to the edge of the ship, the sea water seemed to be boiling. Countless fish were splashing on the sea surface, and many were jumping high.

"What's going on?" He frowned and looked deeply for a few times before rushing to the control tower. "Has the sea temperature increased?"

"No, the temperature is normal." The first mate chased after him and said, "But the sonar detected abnormal fluctuations."

The captain paused, looked back at the first mate, and continued walking forward, "It shouldn't be an underwater weapon at this time. Could it be a seismic wave?"

"No seismic waves were detected," the first mate added, "but there were obviously ultrasonic waves of unknown origin in the sea. It should be these ultrasonic waves that caused the fish in the sea to riot."

Animals have a wider range of sound waves than humans, so they can predict danger in advance.

"Ultrasound?" The captain frowned. Could it be that it was Gro's back trick?

After asking about the frequency, it was found that it was not yet a threat to people, and the captain breathed a sigh of relief.

But even if it was harmless to people for the time being, he didn't dare to take it lightly.

The frequency is decreasing at a steady rate. If this continues, sooner or later they will be like these fish schools, unable to find a place to stay.

Besides, the marine environment is an important part of the Lanxing ecosystem. If all the fish die, it will be another form of destruction.

The captain quickly contacted several other ships and found that they all encountered similar problems. He did not dare to delay and contacted the general control directly.

"Ultrasound?" Lin Fan looked at the lively sea surface and didn't quite understand.

All she knew about ultrasound was the small machine used to wash glasses in optical shops.

"Is this thing very harmful?" She looked at the obviously panicked people in the information room and asked John Woo completely out of the situation.

"The sound waves we come into contact with every day can be considered harmless waves, so you can't feel it. In fact, sound waves can also be used as weapons." John Woo knew more than Lin Fan, gritting his teeth and frowning.

"So Gro is planning a sonic attack this time?" Lin Fan still doesn't quite understand, "Can it be used as a weapon just by sound?"

She suddenly remembered the roaring noise of square dancing in the park, which made people's brains hurt every day, and she seemed to understand a little bit. "Are they trying to kill us?"

right! There is that kind of particularly high-pitched sound that can be unbearable if you listen to it for a long time.

Seeing the ignorant and innocent look on his silly girl's face, John Woo really couldn't say anything serious, so he calmly said.

"Let me explain it to you briefly. When a thing vibrates, it will produce fluctuations in the medium propagation. This is a sound wave."

"The frequency unit of sound wave vibration is Hertz. But the range of sound waves that humans can hear is only between 20 Hz and 2 Hz. Below this range, or beyond this range, we cannot hear it."

"Animals are usually more alert than us because their hearing range is wider than ours and they can hear ultrasonic waves that we cannot hear."

"The resonance caused by long-term sustained fixed-frequency sound waves can cause substantial damage to different materials, but just the kind you think of, relatively loud noises can cause mental damage to people. The essence of sound wave damage is resonance."

"For example?" Lin Fan still didn't understand.

"For example, an earthquake is when the fluctuations caused by the movement of the earth's crust are transmitted to the ground and resonate with the surface buildings, resulting in serious consequences." Wu Yusen said seriously.

"There are also people who make noises at a glass. When it reaches a certain frequency, it will shatter the glass. Have you seen it on TV?"

Lin Fan nodded.

"This is also resonance. A loud shout on a snow-capped mountain can cause an avalanche, which is also a resonance effect. A group of people running at the same rhythm can shake the bridge when it reaches a certain frequency..."

Lin Fan kept nodding. These were real examples he had seen on the news.

"So Gro came here with the purpose of destroying infrastructure this time?" she asked.

"I may not have made it clear, but everything has a resonance frequency that can lead to its destruction." John Woo sighed. "Including people."

Lin Fan's eyes suddenly widened.

"If you look at these fish in the sea, they must be in such pain because the frequency has endangered them. In the future, more and more animals will be affected."

"Can people break like glass?" Lin Fan's face was filled with disbelief.

John Woo patted her shoulder to reassure her, "Don't worry, it's not that easy. Animals have complex structures such as bones and internal organs, with different densities and different resonance frequencies. Moreover, the frequency that can harm the human body is already very low. As you imagine The scene doesn’t come easily.”

To say it is not easy is also relative.

Even if a person does not break like a glass, think about it, if the frequency of bone resonance happens to be reached, the bones in the whole body will vibrate.

Hypothetically, assuming that such resonance will not cause substantial organ damage to people, but the bones are constantly vibrating like a mobile phone, the feeling is terrifying just thinking about it.

What's more, it can't be without substantial harm.

Moreover, there are countless delicate internal organs in the human body.

A normal punch or fall would land him in the hospital for a long time.

Not to mention this kind of continuous vibration...

Lin Fan knew that John Woo's words were to comfort her. If this was really what Gro had in mind, it would be a cruel move.

Sound waves will cause resonance in various seabeds, on the ground, in snowy mountains, and in bays, causing natural disasters to strike first.

Then, the creatures that survive this large-scale disaster will have to accept the next wave of harm caused by their own resonance...

How vicious! Vicious!

Due to his own emotional problems, Lin Fan rarely had particularly strong emotions.

But at this moment, she really wanted to get into Gro and smash the bastard who came up with this idea.

This is a planet!

How could they? How dare? !

"Send me the location!" Lin Fan rushed out with red eyes.

After a while, the figure of the star appeared on the big screen and flew high into the sky.

The writing on sound waves is not particularly rigorous, and searching for information has already made me a scumbag.

Let’s take a look. hey-hey.