Doomsday: Humanity shrinks 100 times

Chapter 100 Tower
"Ah, I know, I've played it," said Zou Yunxin.

Lu Yuning also suddenly realized.

What Zhang Xinyue was talking about should be the "messenger", which is an ancient practical and entertaining tool, and also the original prototype of the telephone.

It is very simple to make. Two cup-shaped objects with a taut string in the middle can transmit sound.

The principle is to use the vibration of solid sound waves to transmit. When the sound source oscillates at one end of the microphone, the physical structure of the paper cup can effectively gather the sound and reduce the diffusion of the sound, and finally transmit it to the paper cup at the other end through the rope in the middle.

They just need to build a cup receiver on the amplifier and the sniper station respectively, and then connect a wire in the middle.

The advantage of doing this is that there doesn't need to be too many people on the sniper platform, especially weaker girls like Zhang Xinyue.

Another important point is that the amplifier does not need to be built too high. Unlike the transmitter, the amplifier needs to collect sound waves, so the volume may need to be larger to be effective.

The cost of working at height is also higher, and material handling is also a problem.

In short, building the amplifier below is the best choice, and this megaphone is also an important device for them.

After some discussion, everyone finally confirmed the construction plan.

The construction of the sniper platform and amplifier officially began.

Since the amplifier is made of metal and still requires Xu Ting's participation, Lu Yuning decided to make this device first.

However, the construction location is a problem.

Lu Yuning thought for a while, and suddenly an idea popped up in his mind. He asked:
"Since the megaphone can effectively transmit sound, is it possible to transmit the waves collected by the amplifier in this way?" Lu Yuning thought for a moment and asked.

Zhang Xinyue understood what he meant and said, "Well, I'm not sure. Do you want to..."

"I want to build the amplifier where the water tank is, and then build a tower-like facility on this floor of our shelter to be used for reconnaissance and sending and receiving messages."

Everyone opened their mouths, looking a little surprised.

"Tower?"

"Well, the tower is the air traffic control facility in the airport. The people on it can observe every aircraft within the airport and direct ground and air traffic. It is somewhat similar to the function of our facility, which is also reconnaissance and command." Lu Yuning explained briefly.

Everyone digested the information for a moment, then reacted.

"Wow, that's great. This tower will be Xinyue's studio from now on. As long as we stay in the tower, we can scout the surrounding area at any time."

"Yes, but we still need to confirm whether this method of transmitting waves can be used on Xinyue's supernatural powers." Lu Yuning nodded.

Lu Yuning was mainly concerned about the concealment problem if the amplification device was built below.

So after some thought, we decided to expand a platform in the same way at the location where the water tank was built before to place the amplifier.

But the problem is that this position is actually quite high, so its practicality is a bit poor. It is not much different from being built on a sniper platform, so I came up with the idea just now.

"We'll know only after trying it. Let's make a megaphone first and increase the distance. When I do range detection, if this device is useful, then I should be able to detect farther in the direction of the megaphone." Zhang Xinyue said, thinking of an experimental method.

Lu Yuning nodded: "Okay, then I'll make one right away."

Everyone was quite excited.

Xu Qi and Xu Ting looked at each other with a hint of envy in their eyes.

I have to say that the construction of Shudong is far ahead of them.

Lu Yuning quickly made the device.

The material of the cup-shaped speaker can be anything, but Lu Yuning used plastic for the middle line.

Zou Yunxin and Lu Yuning each grabbed one end of the megaphone and stretched it straight and tight.

Zhang Xinyue stood beside Zou Yunxin, her eyes closed, clearly having activated her supernatural power. Not long after, she opened them with a hint of surprise. "It's working! I can detect the scene around me, and I can also detect the scene around Yu Ning, but I can't visualize both at the same time."

Everyone was very excited, it seemed that the tower plan was feasible.

In this way, the final construction plan was determined.

Five meters from the tree trunk, a platform was built to place the projection device, also known as the sniper platform, and then a megaphone was made to communicate with Zhang Xinyue in the tower.

Build an amplifier at a distance of two meters, and also make a microphone to transmit the amplification information to Zhang Xinyue.

Finally, a tower was dug and built at the lowest shelter location, mainly used to send and receive information for Zhang Xinyue.

However, there is a problem. No matter which direction the amplifier is placed, the direction of the tree trunk is always a blind spot. Since the tree trunk has an impact on the transmission of waves, the detection distance in the direction of the tree trunk is estimated to be very short.

But we can’t think too much about it now, we can optimize it later.

After all the plans were finalized, Lu Yuning officially started work.

In order to free Xu Ting as soon as possible, the first thing to do is to use the amplifier.

Lu Yuning used the same method as before to build an aerial platform.

Then, with the help of Xu Ting, the designed amplifier was quickly made.

The amplifier appears to be composed of three pot-lid-shaped objects, facing in three directions.

In this way, wave reflections can be collected in three directions.

There is a microphone behind the three collectors, which is used to receive waves and then transmit them.

Next, just get a taut wire and connect it to the receiver in the mail room downstairs.

This step was originally a bit difficult, but with Xu Qi around, it became much easier. I just had to let the chipmunk help connect the wire.

Lu Yuning has already dug and built the tower. The construction site is right next to Zhang Xinyue's dormitory. It will basically become her studio in the future, and the earpiece has also been made.

Finally, connect the voice line to the earpiece, and the entire amplifier device is completed. It is much simpler than expected.

The main reason was that Lu Yuning already had experience in high-altitude construction, and with Xu Qi's help, what was originally a very troublesome task was finally completed without much effort.

At this time, everyone gathered in the mail room nervously.

Zhang Xinyue stood in front of the receiver, closed her eyes in the expectant gazes of everyone, and her supernatural powers unfolded.

Then she seemed startled and quickly opened her eyes. Before anyone could ask, she seemed a little surprised and closed her eyes again.

"Great, the one-way detection distance is at least two to three times better than before!" Zhang Xinyue said excitedly after opening her eyes.

"Can the detection direction be controlled?" Lu Yuning asked a key question.

"Okay," Zhang Xinyue nodded affirmatively.

"So, the waves emitted by your body are actually directionless, and the detection in a certain direction is actually your brain's selective interpretation of the waves reflected from that direction?"

Zhang Xinyue paused, then nodded. "That's what it looks like, but it's a little strange. Logically, since I'm standing in the tree hole, the waves transmitted outward should be attenuated, but it seems like there's no effect."

"No impact? Maybe it was transmitted through this thing?" Lu Yuning patted the receiver.

"It's possible. I just tried it and it's possible to conduct range exploration, but the range is not very wide." Zhang Xinyue recalled the exploration test just now.

Lu Yuning nodded. "That's basically confirmed. Your detection range is probably affected by two factors. One is the intensity of the reflected wave, and the other is probably the upper limit of your brain's ability to receive information."

(End of this chapter)