Chapter 1489: Phone design and speakers!

"Xiaoxuan, how did you abuse King Wei like this? If your Majesty knows, how

can he forgive you lightly?"

After solving the problem for Li Tai in the Qiqu Pavilion workshop, Li Zexuan

was pulled aside by Cheng Yaojin and complained in a low voice.

"This... Uncle Cheng, where do you start? Why did I abuse the blue bird?"

Li Zexuan heard the words, and said in amazement.

Cheng Yaojin thought that Li Zexuan was embarrassed to admit it, and he could

not help but curl his lips and said, "Hey! This is not abuse? When did the old

man ever see Wang Wei who was not well-dressed and handsome? Look at him now.

, What's the difference from the ordinary craftsman in your workshop? If he

didn't make a sound just now, the old man almost didn't recognize it! In the

words of their literati, it was unkempt and unkempt!"

To show that Li Tai was indeed abused, Cheng Yaojin racked his brains and used

a few idioms, but unfortunately he still used the wrong one!

Li Zexuan was speechless for a while. He paused for a moment. He said: "Uncle

Cheng, Qingque is participating in a cutting-edge technology research project

of the academy. These few days are indeed very hard, but all of this is his

willingness. You How can the old say that I abused him?"

"Research project? What research project? Oh, yes! Ugly cow kid didn't go home

last weekend. Your aunt has been talking about it for a while! Could he also

be involved in this research project?"

Cheng Yaojin's eyes lit up when he heard this, and then he thought of his own

treasured son again, and quickly asked.

"Uh..."

Now Li Zexuan was speechless, saying that Cheng Yaojin really valued his son.

With Cheng Chumo's grades and unsettled temperament, how could Li Zexuan

arrange for him to do scientific research? Chumo is still recovering from his

injuries in the hospital. If you tell the truth, the kid will get fattened

again if he is not sure. After thinking about it, Li Zexuan can only vaguely

say:

"That's right! But the research projects recently carried out by the Academy

are all top secret. No one is allowed to tell anyone outside of the project.

This is a rigid rule, and my nephew can't make an exception. I hope Uncle

Cheng can forgive me! "

"Top secret? What project is so mysterious?"

When Cheng Yaojin heard it, he was even more interested. For Li Zexuan’s

ability to create new things, Lao Cheng was 10,000 persuaded. For example, the

variable speed disc brake bicycle that he can’t put down now, so Li Zexuan can

be so solemn. The project, it must be a good project, so he asked unwillingly:

"Xiaoxuan, really can't tell the old man a little? You Uncle Cheng is not an

outsider, so it is impossible to tell other people. Besides, you are the head

of the Yanhuang Academy, aren't you making these rules? So true? What are you

doing?"

Li Zexuan said helplessly: "Uncle Cheng, just because I am the head of

Yanhuang Academy, I have to lead by example. If I don't abide by the rules,

how can I expect other people in the academy to abide by the rules? So my

nephew really can't follow this matter. You said! Don't worry, this research

project is definitely beneficial to Datang!"

"No! Isn't this the equivalent of not saying?"

Old Cheng Nian uttered a word, but he also knew that it was impossible to ask

the truth from Li Zexuan, so he did not continue to ask. Seeing the brand-new

bicycle he was pushing, Lao Cheng became excited again. He laughed and said:

"Haha! So busy, Xiaoxuan! The old man first go back to Chang'an! That old

bicycle is no longer needed, this one is enough! Haha!"

Facts have proved that Lao Cheng is a person who loves the new and dislikes

the old. This old guy rode a variable-speed bicycle and left the workshop like

a gust of wind. Pity the old bicycle he rode over, can only lie quietly in a

corner of the workshop. Eat ashes!

.................................

After Cheng Yaojin left, Li Zexuan arranged for someone to send the remaining

variable speed bicycles to Qin Qiong, Yuchi Jingde, Niu Jinda, and Li Jing's

homes. These were the closest to him. There are good things that you must not

forget them. of. In addition, Li Zexuan also sent Liu Feng and Liu Yun to the

palace to give three variable-speed bicycles to Li Er, Li Chengqian and

Changle.

It is said that after the cure of Changle's qi disease, the whole person is

more lively and active than before. Now it is just right to send her a

variable-speed bicycle!

"Qing Que, I suddenly had an idea as a teacher, is it feasible for you to come

and listen?"

After all arrangements were made, Li Zexuan went to a courtyard in the deepest

part of the workshop, found Li Tai who was modifying the telegraph, and said.

This other courtyard is the secret research base of the Academy’s second and

third assassin projects. Outside the courtyard is guarded by Li Zexuan’s

guards day and night. All personnel entering and leaving must be verified for

identity, which is considered tight guard!

At present, the participants of these two killer projects are intensively

recruiting and screening, but this does not affect Li Tai, the deputy chief

designer, to promote related work. In just a few days, Li Tai has created a

simple With electronic components such as resistors, capacitors, and

inductors, coupled with the electronic diodes and electronic transistors made

by the workshop, it can be said that the foundation of Datang's electronic

industry has gradually taken shape!

"Oh? Shanchang, please say!"

Hearing this, Li Tai immediately put down his work and looked up at Li Zexuan.

After "mixing" with Li Zexuan for so long, Li Tai knew that every thought of

Li Zexuan could change this era. He didn't dare to despise it!

Li Zexuan pondered for a moment, and said: "Qingque, the telegraph we are

making now transmits information through the mutual conversion of electricity

and electromagnetic waves. This kind of telegraph is indeed able to coordinate

the strategy and anticipate the enemy's opportunities when used in the

military. In the future, civilians will have the need for ultra-long-distance

communication, and the telegraph will appear inconvenient!

So what I think is that we might be able to make a device that converts sound

into electricity, and then electricity into sound. That way, only one wire

connection is needed to achieve real-time sound transmission at both ends of

the wire! "

This is actually a wired phone. Li Zexuan wanted to do it a long time ago, but

before Datang had no industrial foundation and couldn’t do it if he wanted to.

Now it’s different...

This remark might sound like a fantasy to others, but Li Tai did not rush to

deny it. He pondered for a long time before he said:

"Electric harmony? Shan Chang, your idea sounds okay, but when it comes to

implementation, our first step is to solve the problem of how to convert the

two completely different energies of electric harmony to each other!"

profession!

I have to say that Li Tai is now more professional than before, and he can see

the essence of the problem at a glance.

Li Zexuan expressed his appreciation and said: "Haha! Qingque, you are right!

To achieve long-distance real-time sound transmission, the first problem is to

solve the problem of mutual conversion between electric and sound! Although

they are two different energies, but It may not be impossible to transform

each other! For example, the previous electricity and magnetism are not of the

same kind, but with Miss Mo’s efforts, can they not be transformed into each

other now? I have a preliminary idea here. Let me talk about it. Listen, think

about it in private!"

"Yeah! Shanchang, please say!"

Li Tai nodded hurriedly, not at all downhearted because Li Zexuan wanted to

add a burden to him. He is a person who is born with a new love and pursues

new technology. Otherwise, he would not let the Xiaoyao lord improper, and

would run to the workshop to suffer!

Li Zexuan picked up paper and pen, and drew while writing: "In fact, it is not

difficult to convert electrical energy and sound energy to each other, but

magnetic energy is needed in the middle to be an intermediate medium! You see,

green bird, we can be at the front of the machine Use this cone-shaped paper

cone to collect sound. You have learned "Physics". You should know that sound

is a sound wave generated by the vibration of an object. Similarly, when the

sound wave hits the paper cone, it will make the surface of the paper cone.

Produce tiny vibrations.

At this time, if we attach a copper coil to the bottom of the paper cone, and

then place the copper coil in a permanent magnetic field, when the front of

the paper cone receives sound, it will drive the coil to vibrate, and the coil

will cut the magnetic induction line. With the current corresponding to the

frequency of the sound wave, we have completed the process of generating

electricity by sound wave!

How to convert electricity into sound waves is also simple. It is also

possible to attach a coil to the bottom of the paper cone and apply a

permanent magnetic field. When the current passes through the coil, the

corresponding magnetic field is generated in the coil. This magnetic field and

the applied permanent magnetic field produce an interaction force. This force

causes the coil to vibrate with the sound current in the applied permanent

magnetic field. The cone diaphragm and the coil are connected together, so the

diaphragm also vibrates .

Green bird, you should know that under the same voltage, the size of the

magnetic field generated by the same energized coil is proportional to the

size of the current. Therefore, when the current passing through the coil is

larger, the coil moves in the magnetic field more violently, and the louder

the sound is. , So the vibration of the coil can produce a sound similar or

identical to the original audio signal waveform.

As a result, we can realize the conversion from sound to electric current and

then electric current to sound. As long as the wire is long enough and the

electric energy is large enough, our voice can travel far enough! "

Li Tai was a little dumbfounded. Faced with such an ingenious design, he was

so excited that even his breath was overwhelming. Perhaps this was just

suffocating for dreams!

After a long time, Li Tai finally recovered from the shock. He took a few deep

breaths, then looked at Li Zexuan with the look of monsters, opened his mouth,

and couldn't speak for a long time!

"Mountain...Mountain long, this design is so ingenious! It's so ingenious and

amazing!"

Shaking his lips for a long time, Li Tai finally said, "If it can be done,

then there will be no need for a telegraph machine! Shan Chang, otherwise we

will directly start researching this kind of sound transmission machine and

give up improving the telegraph machine, how about? "

Li Zexuan hurriedly waved his hand and said, "No! Qingque, what I told you

just now was just my idea. From idea to product, there is still a long way to

go, even if you make it. The later audio debugging will take a long time, and

the improvement plan of the telegraph has been deliberated countless times,

and now it is completely natural.

Moreover, compared to this kind of sound transmission thing, the telegraph is

not useless, especially for military communications, the telegraph has better

confidentiality, even if the enemy seizes our telegraph, they do not have a

codebook. use! In addition, the telegraph machine does not require wires to

send and receive telegrams, which is the most convenient when fighting! So in

any case, be sure to change the telegraph machine first! "

Hearing what Li Zexuan said, Li Tai also woke up from his excitement. He

nodded and said, "Well! I understand!"

It's just that a touch of disappointment flashed in his eyes. The feeling that

he knew that there was a more advanced thing, but he didn't have the time to

create it for a while was really uncomfortable for Li Tai!

Li Zexuan smiled when he saw it. He patted Li Tai on the shoulder and said,

"However, although we currently do not have the energy to build such a long-

distance sound transmission machine, we can build a simple sound-electric

conversion device first. It won't take long!"

"Oh? Shan Chang, what do you say?"

Li Tai's eyes lit up and said quickly.

Li Zexuan smiled and said, "I just want to make a small thing. Qingque will

help you make it for the teacher! This thing is to use the paper cone

diaphragm to convert the human voice into electric current, and then use a

triode to amplify the current. The current flows through the coil, and then

through the action of the magnetic field, it vibrates with a more violent

amplitude, so that the sound that comes out is louder! I call this thing a

loudspeaker or a speaker, compared to the kind of long-distance sound

transmission machine ~www.mtlnovel.com~ This thing is much simpler, if you

have the time, try to make one first!"

Li Tai thought about it in his mind, and then excitedly said: "This is a good

idea! The loudspeaker is simple to make, but the principle is similar to that

of a long-distance sound transmission machine. If you can make this thing, you

can do that in the future. Distance Transsion’s machine is even more

informed!"

Li Zexuan nodded and said, "That's exactly the truth!"

Having said that, he looked at the shadow of the tree outside the house and

said, "Okay! Let's do this first, Qingque, you keep busy, I will go now!"

Li Tai hurriedly bowed and said, "The long mountain walks slowly!"

After experiencing this incident, he admired Li Zexuan even more. It was like

a mountain looking up, Jingxing and walking, although he couldn't reach it, he

yearned for it!

.................................

"Your Majesty, your Royal Highness, please see you!"

About Shenshi, the palace, Ganlu Hall.

After reviewing the memorial for a while, Li Er, who was dozing off his chin,

was suddenly awakened by a shrill voice. Who else could it be if it wasn't

Zhao Song? Speaking of this "special" moment, only Zhao Song dared to come

over and report the matter.

"Oh? Cheng Qian is here? Let him in!"

Li Er rubbed his sleepy face and cheered up.

"Here~!"

Zhao Song took the order and left, and couldn't help but breathe a sigh of

relief in his heart.

After a while, Li Chengqian came in, and he didn't come in alone, he also...

pushed a car!

Seeing this, Lao Li immediately lost any sleepiness. Before Li Chengqian

saluted him, he opened his mouth and said: "Chengqian, why did you push a bike

in? Huh? No! This bike seems a little weird... ...."

...........................