Before Song Siyuan finished speaking, the rumble of carriages and horses came from behind them, and the surprised neighing was especially clear.
Everyone looked back and saw that the carriage had stopped outside the canyon. All the horses, no matter how tall or short, fat or thin, seemed to have sensed something. They kicked their horseshoes in place and refused to come forward any more, even if they were craftsmen. Even though they deliberately pulled the halter, they showed no signs of moving forward.
In this way, Song Siyuan's guess came true, and they quickly left the canyon and came to the vicinity of the convoy.
"How's it going? What did you find?"
Old Yue looked at Yue Guanchao. It seemed that their faces were no longer sad, and they probably made some progress.
Song Siyuan looked at Yue Qingshan and explained: "The reason why noisy ghosts are scary and animals are afraid of valleys is basically clear. It can be concluded that this is not really ghosts and gods, but a special geological structure..."
Song Siyuan told everyone about the situation they found out in a eloquent and comprehensive way. After hearing the cause and effect, Gui Fangzong and the others' fear of the valley was a little shaken at this moment. If it was just because of the special structure of the valley, then it could be completely ruled out. Ghosts and gods are at work.
Sun Daqiao listened to the whole story and felt it was extremely magical. He sighed with emotion: "I didn't expect that this strange phenomenon is actually because these peaks were volcanoes in the past. No wonder our ancestors have always gone through changes. I really can't imagine that the predecessor of green mountains and clear waters , turned out to be lava and earthquakes.”
"Although the cause of the strange phenomenon in the canyon has been found now, we still have to solve the problem of your sound waves. According to your wishes, the sound waves don't stop day and night. If our horses can't get through it, we won't be able to pull so many things."
Gui Fangzong said worriedly: "Do you have a solution?"
"That's what I find most difficult."
Song Siyuan explained: "Infrasound waves have a wide range of sources in nature and are penetrating. Any object can only block infrasound waves to a limited extent. It is almost impossible to find something that can completely block infrasound waves."
"but."
She changed the subject: "It is precisely because infrasound waves have a wide range of sources in nature. Some infrasound waves are not fatal to living creatures. Infrasound waves that are completely harmful to living creatures are just like a drop in the ocean. Many more infrasound waves have no effect on living creatures at all. In this valley The infrasound waves have a weak effect on living creatures. It only makes living creatures fearful, but it is not fatal."
"When I was reading science magazines, those articles said that although sound waves are extremely penetrating, they can cancel each other out. If sound waves of moderate intensity are launched from the opposite side toward the source, their ripples in the pond will be canceled out. Lose."
After that, Song Siyuan lowered her head and picked up the stick, and drew two opposite fan-shaped ripples on the backboard of the carriage and horse: "If these ripples are infrasound waves emitted by the pillars, then as long as the infrasound waves are emitted in this direction from the opposite position, the two ripples will Sound waves in opposite directions transmit to each other, and when they come into contact with each other, they will be canceled out."
Yue Guanchao looked at the two facing fans and narrowed his eyes: "Then, can we just build something on the horse that can generate infrasound waves to offset the impact of the sound waves on them?"
Song Siyuan nodded: "Theoretically, this is true. We have to see what materials we have on hand that can be convenient for us to use?"
"Things that can make noise." Song Siyuan thought for a moment and came to the conclusion.
"Then it can only be a copper pot."
Ghost Fangzong explained: "We brought the copper basins with us when we traveled. These copper basins are made of fine copper. They can be used to store water and can also be used to cook fires."
"How much is the quantity?" Song Siyuan nodded, having already decided to use a copper basin.
Ghost Fang Zongdao: "There were many craftsmen when we came out, about ten people."
"There are enough, as long as each horse can get one, it is enough. We have about ten horses now, which is completely enough." Song Siyuan paused, and then asked: "Are there any felts or furs? "
"Does the sheepskin tent count?" Ghost Fangzong replied.
"Can."
Yue Guanchao listened to these things and asked: "This thing is just like the city gate tower and the hip shaft. The two things don't fit together at all. What are they doing?"
Song Siyuan knew they were curious and explained: "The furrier the thing, the more it can absorb sound waves. These sheepskin blankets are materials that naturally absorb sound waves. When the infrasound waves pass through these blankets, they will also be partially blocked by the hair. Then, when they reach the horse's head, There will be much less infrasound waves in it.”
"As for this copper basin?"
Song Siyuan took the copper basin from the craftsman, picked up the metal veins she found, and knocked on the copper basin. She only heard a buzzing and trembling sound. The copper basin and the metal veins roared together, making people's ear canal tremble. It hurt. She picked up the copper basin and smiled proudly: "Bronze bells, the trembling of the bells will also produce infrasound waves. It is precisely because of the transmission of infrasound waves that people feel anxious when listening to them."
"I think." She paused and her tone became serious: "As long as we keep hitting the copper basin on the horse's head, while emitting sound waves, we can also generate part of the infrasound waves, which is enough to offset the sound waves generated around us."
"Of course, with our strength and frequency, it is impossible to knock out continuous infrasound waves even if we are exhausted. My suggestion is to imitate a bell, put metal veins in the copper basin, and rely on these veins to hit the inner wall of the copper basin. As long as Hanging it near the horse’s head will do the trick.”
"Okay, I think I'll do what you want. I'll go get what you're looking for."
Gui Fangzong signaled to the craftsmen around him, and they prepared all the copper basins and sheepskin tents. At the same time, they also began to explode the rocks and completely take out the metal veins inside.
According to Song Siyuan, the wool tent only needs to be able to cover the horse's ears. The difficult part is how to fix all the metal strips on the copper basin so that they shake as the horse walks.
They tried several times and decided to tie these long metal strips to the tree branches at fixed intervals, and then fix the four tree branches in the shape of a "well" at the bottom of the copper basin. In this way, as long as the copper basin is turned upside down, As it shakes, you can see the metal veins hitting each other against the copper basin, vibrating and trembling.
As for how to fix it on the horse's head, that's a better solution. Just bind it within the horse's blanket. You can also use branches to make a shelf and cover the horse's head and ears.
After deciding what to do, everyone worked separately to make copper bells and cut blankets. They quickly prepared these things, used wooden sticks to build a hat-like frame, and completely wrapped the blanket around the horse's ears, along with it. The wooden sticks were also fixed on the horse's ears, and then the wooden sticks on both sides were used to fix the copper basin, which was considered preliminary completion.
Following Gui Fangzong's signal, these craftsmen pulled the reins and tried to drive the leading horse forward. After a few kicks, the horse calmed down and followed the road between the pillars. It no longer showed the panic just now. .
This has proven that their method is effective.
With the demonstration by the leading horse, the rest of the craftsmen were relieved, shouting and pulling the reins. These horses followed the route of the leading horse, setting up the carriage and roaring in front of the school.
The group of people was like a caravan with camel bells swaying, roaring and trembling along the way.
As the carriage drove into the depths of the canyon, the complicated suspended forest gradually became more lush. Yue Guanchao and the others opened the curtain and looked carefully at the wilderness.
The pillar forest in this canyon is wider than they imagined. In this canyon where animals cannot survive, plants have become the overlord. They are rarely disturbed by external objects and forces. They grow wildly in their original ecology. Except for ordinary plants, they can see Most of all, there are rare flowers and plants everywhere.
Song Siyuan said: "Strange, if there are no animals, how do they complete pollination? Many plants will use animals to complete their own pollination and reproduction. For example, when squirrels collect pine cones, they will take the pine nuts to other places. These pine nuts It is actually the seed of a pine cone tree, and when the opportunity is right, it can germinate and form a new tree.”
"With the sound waves in the canyon, animals cannot enter the valley, which also means that animals cannot come into contact with the plants here. Isn't it strange that such a large forest of pillars can appear?"
"Could it be because there are things in the canyon that are not harmed by sound waves?" Yue Guanchao could only guess this way.
Song Siyuan nodded: "It is indeed possible, but it is very slim. Infrasound waves can penetrate the body of any living thing. There is no fear of this method, only whether it can receive infrasound waves. Unless, the animals in this forest cannot receive infrasound waves at all. That would be much scarier.”
"What kind of creature can thrive and survive today completely under the influence of infrasound waves?" When mentioning this point, everyone in the car couldn't help but feel chills on their backs.
Soon, their suspicions came true!
The carriages and horses were getting closer and closer to the exit of the canyon, and the originally silent valley became extremely lively. Giant pine forests began to appear in front of everyone's eyes. If they were big, they would have been growing like a canopy for at least thousands of years, just like a house. The palace covers a dozen pillars under the canopy of trees.
The huge tree is a hundred meters high and cannot be hugged by more than a dozen people. The tree roots are like giant snakes as thick as buckets, circling through the soil. A mountain road is formed between the two huge pine trees, which can directly allow four or five cars and horses to pass side by side. The branches are twisted Knot, teeth and claws dancing, standing on the ground, green and lush.
When I got closer, I realized that this pine forest was completely the branches and trunks of these two pine trees. They were like giant door gods, standing on both sides of the mountain road out of the valley!
They stopped the carriage and stared at the pine trees carefully. The needles of the pine trees were larger than those of ordinary pine trees. Even an ordinary bunch of needles was much larger than a cattail leaf. A single needle was as thick as a chopstick, and it was as green as a pine tree. Painted with green paint, it is shiny and green, and there is a strange and sweet smell between the tree crowns, which makes people unable to help but come forward.
At this moment, they could already see many white-haired squirrels, foxes, spotted deer, white snakes, white hedgehogs... These animals appeared under the pine trees, constantly sucking the sweet smell among the needles.
Swish!
After the giant pine was approached by an animal, the leaves of the giant pine tree began to rustle and sway without any wind.
