In Horai Island in the year 3900 of the continental calendar, Jin was unusually busy.
Whenever he has free time, he is either making something or getting into trouble ......, so it is rare that he has free time.
The date is April 4. The weather is turning into spring, and it is very sleepy.
I think to myself, "Yes, let's do that thing I've always regretted.
Jin thought of doing something that had been on his mind but had been left unattended because of its rather low priority, now that he has more time to spare.
It is a counterpart to a , a so to speak.
At the moment, the <> can what is going on far away, but they cannot the sounds, including the sound of conversation.
The contents of the conversation are covered by the old man's <>, but there is a limit to that too. If I can't see his face, it is meaningless.
"Is there any better way to do this ......?"
Jin thought in the workshop of the institute.
"Sound is the vibration of air. That is, physical vibration. If we can pick it up, that's all we need."
<. It is like a wireless microphone. The part that picks up sound has a physical structure.
Thinly molded magic crystals are used for the diaphragm, and the sound is converted into magic power like a dynamic microphone.
"If we can make a diaphragm with magic power, we can make ......."
This was Jin's conclusion.
Incidentally, there is a on the modern earth.
This device shines a laser beam on the glass in the room to be eavesdropped and measures the reflected wave.
Since the glass is vibrating with sound waves at this time, the returning laser beam will have sound waves on it.
...... is a rough explanation.
Of course, Jin had heard of the principle and had thought about using it, but he had given up the development because of its disadvantages, such as the fact that it was effective only in a room and that it could not be used with materials that absorb sound waves, such as clay walls.
Jin spent two days to develop this method.
The diaphragm could be replaced by the application of a solid physical barrier.
Invisible boundaries are maintained by invisible magic, and the vibrations are used as a carrier wave for free magic element (ether) ...... waves.
"Yes, I think I can manage that."
The problem was the strength of the solid barrier, which is equivalent to a vibrating plate.
If it was too strong, the sound would not be audible because it would not vibrate. If it is too weak, it will be too noisy to pick up the important sounds.
"The sensitivity also depends on the position where the <> is placed. ......"
So Jin decided to make it possible to adjust the strength of the <>. In short, it is tuning.
The strength of the diaphragm can be weakened or strengthened to the point where it can be heard just fine.
>.
The old man was relieved to know that he would be in charge of the operation including the tuning.
This technology is called <> and it enabled him to collect more information from all over the world.
* * * * * * * * * *
"Now you can do your espionage work more easily, can't you?
Jin is relaxing with a cup of tea at home.
Reiko is serving him.
"I'm sure it is."
I see what you mean.
In the case of vision, the image is blurred if it is not firmly fixed, but in the case of audio, the noise only increases, but it can be heard well enough depending on the adjustment.
Since visual information is not so necessary for eavesdropping on the contents of meetings, this technology is expected to be very useful in the future.
Jin laughed inwardly, thinking that what the old man meant by "in the near future" must be in the order of 100 years.
(Come to think of it, he also said that the Sea of Trees at Fuji was a forest formed after the eruption that took place a little over 1000 years ago.)
(By the way, did I mention that the Sea of Trees in Fuji was formed after the eruption that occurred a little more than 1,000 years ago?
Thus, there are other examples where the landscapes we can see in modern Japan have a surprisingly short history.
Oni Oshidashi, a sightseeing area at the foot of Mt. Asama, which rises on the border between Nagano and Gunma prefectures, dates back to 1783, while Mt. Bandai and a group of lakes and marshes including Lake Hibarako, which are scattered at its foot, were created by an eruption and explosion in the middle of Meiji Era (1888).
(I remember the director of the facility where Jin grew up said that the scenery was not like this back then whenever he saw Mt.)
The director of the facility where Jin grew up was a fan of historical dramas, but he was also a maniac in terms of historical research.
For example, he said that Zenkoji Temple in Shinano had burned down and had only a temporary main building during the time of Mito Komon, and that inns were not so well maintained in that era.
But at the same time, it is a fact that they enjoyed any period drama in their own way.
(Thinking back on it, maybe he was trying to get us interested in history in his own way...)
(I wonder if he was trying to make us interested in history in his own way).
A quick digression.
It was good to hear that the development of the planet Hale was going well.
"It seems that 700672......<> is ready to settle down."
Jin then thought of a problem that had yet to be solved.
"The homunculus of Marikka ......?"
The 700672 and other <> by their very nature need <>>.
A spiritual support or a stronghold.
When Marikka dies, the 700672 will surely be tormented by the Master Loss Syndrome. I wanted to avoid that. I wanted to avoid that.
For some reason, neither the old man nor Reiko gave me clear advice on this matter.
(Maybe they are replacing the position with theirs and mine. ......)
(Maybe they are putting themselves and me in the same position... ) When I think about it, I can understand the feelings of the old man and Reiko, so I cannot ask them strongly.
(Should we at least be prepared for emergencies? ......)
But then, Jin wants to prepare for <> as well.
(Is this also my selfishness? ......)
Jin is now a duplicate and probably an immortal being.
This means that he will have to see off many friends and acquaintances in the future.
(Not that he wants to be one...)
Jin feels indescribable when he thinks of the goodbyes he will have to experience in the future, even if they are good now.
Perhaps sensing Jin's feelings, Reiko came to his side with a teapot.
She pours tea and says to Jin.
Father, I am here. The old man and my brothers and sisters are here.
"...... thank you, Reiko."
Jin was glad for Reiko's concern.
Reiko had endured a thousand years of loneliness, searching for a successor to her predecessor, and after the death of the human Jin three hundred years ago, she was now a < After the death of human Jin 300 years ago, she waited again until the current Jin appeared.
It is no exaggeration to say that he knows loneliness better than anyone else.
"Even destiny can be changed, that's your father."
"Ha, thank you."
I really wish I could do that, Jin thought sincerely today.