The main thing is that the sound it records is very clear, almost the same as the reason, and it is no problem even if it is played repeatedly.

Discs made of wax paper can only be recorded seven or eight times, played dozens of times, and they are almost wasted, which is not comparable to discs made of this resin.

Because it is made of gum and has a dark yellow color, researchers simply named it a yellow plastic disc.

The maximum capacity of the yellow plastic disc is about one hour of recording, which is twice the capacity of the wax paper disc.

Although it has not been measured how long it will last, it should be a lot of time in terms of the hardness of the gum after solidification.

The reason why the yellowwood disc was used for the recording of the council hall before the disc was found to be perfect was mainly the idea of Senior Barry.

At that time, the researchers of the Third Laboratory had two opinions, one was to find the perfect disc medium and then apply it to practice, especially in very important occasions such as the Council Palace.

Another opinion is that since the yellowwood disc has been able to record the sound clearly, then use it first, record the sound first, after all, time is always advancing, and what has happened cannot be repeated, if you can record more, record more, even if there is a better disc in the future, it is not too late to rip.

Senior Barry was very impressed with the latter opinion, so he directly pulled the gramophone and disc to the council hall to install it.

In a small room not far behind the council hall, two gramophones were installed, mainly because if one of them malfunctioned, the other would be able to preserve these precious sounds.

Although Senior Barry made this decision at this time, he didn't think at the time of how valuable these surviving audio materials were.

It is because of these valuable audios that later generations of human historians can understand what changes occurred in society during the development of mankind from agricultural civilization to industrial civilization, and how the great Gülen the Great coped with these changes.

In particular, these audio materials were the earliest records of the active preparations made in the more than two months before the first great war of human beings to resist the counterattack of the Warcraft, so that the tragic war finally ended with the victory of mankind.

In the countless years since, there have been several major wars between human beings, dynasties have changed, and written history has been changed beyond recognition, and only these audios are the most authentic first-hand information. And it's information that no one can refute.

Of course, these yellow discs that recorded the sound are classified now and many years later, and it is rare for ordinary people to see them, even if they are the previous custodians, it is impossible to listen to all the yellow discs.

It wasn't until nearly a thousand years later, when certain figures sorted out these audios for political reasons, and then ripped them into digital form and uploaded them to the Internet, that people got a glimpse of the history of that time.

So countless people heard these audios and were deeply impressed by the wisdom of the ancients at that time, especially Gülen gained a large number of believers, and was known as the only great person who could compete with Oskaia the Great, who unified mankind.

......

There were seventeen microphones in total, except for the golden microphone used by Gülen in the middle, and the rest were used by sixteen important ministers of the empire, including Prime Minister Tang and the ministers.

After everything was installed, the wires on the ground had been neatly folded, put on a pipe, and fixed along the inconspicuous place.

When the red light is on, it is not ready, and when the green light is on, it proves that the control room is ready, and then you press this switch, you can speak, if you have something to talk about, you can turn off this switch again, so that the sound will not be amplified. ”

The light bulb technology has been applied to this PA system to serve as an indicator light, but that's about it, because there are so many shining lights hanging in the council hall that there is no need to use it for lighting.

"Understood, it's easy, just look at it!" Gülen was itching right now, just wanting to know what the effect would be if his voice was amplified.

Frandi had already tested it when he wired it up, but only said a few words of "hey, hey".

Glenn watched from the sidelines, and could hear that the sound coming from Flandy's mouth was not loud, but when the microphone came out of the twelve speakers installed in the council hall, it was so deafening.

The space of this council hall is very large, and it is not particularly obvious when ordinary people speak, but when the sound comes out of the speaker, it produces a magical echo.

The echo is not strong, but it adds a sense of mystery, solemnity, solemnity to the voice of the person who speaks out of thin air.

"Alright, you can try it. Flandy saw Glenn's eagerness, smiled slightly, and gave up his place.

"The green light is on, well, press this switch. Gülen fiddled twice before bringing her mouth into the microphone.

"Ahem!"

Gülen cleared his throat first, a habit he had developed on such occasions, because he was about to speak loudly, so he prepared first.

But I didn't expect this "cough-cough" sound to be transmitted directly to the twelve speakers through the microphone, even if Flandy asked the controller to adjust the volume to a small level just now, because Gülen habitually loud, it still startled the people in the council hall.

"Be quiet!" Flandy hurriedly reminded from behind.

"Oh, okay. Gülen was a little embarrassed, but he was His Majesty the Emperor, and no one dared to say anything about him except Flandy.

"Hey, hey......" followed Brandy's example, first fed twice, and then said: "Thank you to all of you from the Imperial Academy of Sciences, I am very satisfied with this amplification device you have installed." ”

Gülen felt that he didn't speak with any force, but his voice was floating throughout the hall, and both the people in front and the people in the corner could hear it clearly. And because of the relationship between bass and echo, the sound is very magnetic.

The researchers of the third laboratory were overjoyed when they heard the emperor's praise, but because this was the council hall, such a serious place, and in front of so many big people, no one dared to cheer and applaud loudly, but the expression on their faces was very excited.

"Thank you also to the craftsmen of the Ministry of Works, you have also been tired for a day, and in a little while, you will each be rewarded with ten gold coins. Gülen was so pleased that he directly rewarded the craftsmen with the equivalent of more than a year's salary.

"Thank you, Your Majesty!"

"Your Majesty is so generous!"

“......”

When the craftsmen heard that Gülen had given them ten gold coins, they were so happy that they cried out their thanks, regardless of where it was.

They are all craftsmen who specialize in repairing the palace, and they are the craftsmen inherited from their ancestors, not only the palace, but also the families of some big nobles will look for them when they are old, and they have seen countless dignitaries, and no one has ever said a word of thanks to them, and no one has rewarded them with ten gold coins at once.

So much so that the eyes of several old craftsmen were red, and they stood there not knowing what to say.

Prime Minister Tang En, who had just come to the council hall with Gülen, and several important ministers also sat in their usual seats at the imperial meeting, and each of them tried out the microphone.

As a result, when I listened to my soft voice coming from all directions of the council hall, I also felt very satisfied.

During the court meeting, as important ministers seated on the political platform, they inevitably had to make some speeches, and like Gülen, they had to speak loudly without losing their manners. often makes the face red.

Especially Prime Minister Tang En, he is sixty years old today, although he is not too old, but because he is frail and sickly, he often coughs, and his throat is not good, but as the prime minister, he has to express his opinion, and every court meeting will make him very painful.

Now, with the megaphone, even if the voice is a little smaller, it can be transmitted throughout the entire council hall, which can be regarded as a big problem for him.

After everyone had tried it, they were waiting for the official use of it at the court meeting tomorrow, and the people gradually dispersed, and Flandy was ready to return to the magic tower with Glenn.

But just as Flandy turned to leave, he saw Minister Dean come with a red-faced Candace.

"Flandy, stay here! I have something to discuss with you!" Minister Dean stopped directly in front of Frandy.

"Lord Dean, Candace. Frandy nodded to the two. Then he continued, "What's the matter?"

"Hehe" Minister Dean laughed before saying, "Flandy, I heard that this megaphone was invented by a little girl?"

Flandi glanced at Candace, who was hiding behind Minister Dean with a blushing face, and also smiled: "That's right, it was indeed Candace who invented it, she is very smart and flexible, I am very optimistic about her." ”

Minister Dean smiled even brighter: "So, is this megaphone your Imperial Academy of Sciences preparing to build a factory and produce it in large quantities?"

"Of course, there are many applications for loudspeakers, and of course they need to be produced in large quantities, Minister Dean, do you have any opinions?" Flandy had already guessed what Minister Dean meant.

"Then can the Academy of Sciences and the Ministry of Industry join forces to build a megaphone factory? We have a lot of craftsmen in the Ministry of Industry, which is much better than if you recruit outside. Minister Dean looked at Flandy with a wistful expression.

Although the Imperial Academy of Sciences is nominally under the jurisdiction of the Ministry of Industry, this is only in name, and Minister Dean does not dare to really control Frandi.

So when Minister Dean saw that the Imperial Academy of Sciences would produce one result today and one tomorrow, and each result would be transformed into a product in the factory, he began to think about it.