Wang Mumu did not want to use the walkie-talkie technology of his previous life in his communication helmet, in which the walkie-talkie was born in the 20s of the 20th century, and there was an inventor with a quirky personality named Kermode, who used the newly invented photocell at that time to collect reflected light. The "empty" reflects a strong signal, and the "bar" reflects a weak signal. Kermode uses a magnetic coil to determine "bars" and "nulls". It's like a child attaching a wire to a battery and wrapping it around a nail to clip paper. Kermode uses a coil with an iron core to attract a switch when it receives an "empty" signal, and when it receives a "bar" signal, it releases the switch and turns on the circuit. As a result, the walkie-talkie reader is noisy. As for the subsequent signaling processing of modulating signals to convert audio with technologies such as phase-locked loops and voltage-controlled oscillators, I am still a long way off, and I can't get closer.

Wang Mumu wanted to use radio broadcasting to communicate, but fortunately, in this era, all this is unique to me, so there will be no interference and confidentiality problems. Besides, if there is really an important confidential matter, we still have a telegram.

In Wang Mumu's previous life, on Christmas Eve 1906, Fresenden and Alexanderson in the United States set up a radio station near New York and broadcast for the first time ever. The broadcast consisted of two jokes, a song and a solo violin piece. The radio program was clearly heard by the people who were scattered around at the time with receivers.

In 1908, Forrester of the United States made another broadcast on the Eiffel Tower in Paris, which was heard by all the military radio stations in the area and by an engineer in Marseille. In 1916, Forrester broadcast news about the presidential election at an experimental radio station in the Bronx Press Bureau, but only a handful of people at the time were able to listen to these early broadcasts.

Thanks to the widespread use of radio and the mastery of high-power transmitters and high-sensitivity tube receiver skills, broadcasting has gradually become a reality. On June 15, 1920, the Marconi Company held a "Radio-Telephone" concert in England starring Mrs. Melba, which could be heard as far away as Paris, Italy, Norway, and even Greece. This was the beginning of the broadcasting career. In 1919, a high-power transmitter was created in the Soviet Union, and in 1920 experimental broadcasting began in Moscow.

Wang Mumu has already begun to give lectures to some relevant personnel, Wang Mumu's lectures are for Hudong's wedding technical training, so Hudong is the main object of education; Hu Sanniang and Yuwen Rounu did not pull it down; The eldest princess regrets that she didn't put in the effort to learn Morse, so now when there is something new, she will never reject it and actively participate; Little Helen and Hu Erniang heard that an epoch-making artifact was going to be released, so they stayed here and didn't go back at all, they wanted to get first-hand information .......

Wang Mumu said that the sound that can be heard by the human ear is called sound waves, and the frequency range of sound waves that can be heard by the human ear is between 20 HZ and 20,000 HZ. Sound waves are highly attenuated as they travel through the air, so they travel very close together. The frequency of radio waves is much higher than the frequency range that can be heard by the human ear, and the medium of propagation is the electromagnetic field. So it can travel a long distance. In order to make the sound travel farther, we let the sound wave signal ride the "horse" of the radio wave signal. In technical terms, I call the "horse" carrying sound waves carriers.

The transmission of the broadcast signal is carried out in the broadcaster. The sound wave of the broadcast signal is converted into an acoustic electrical signal through an electroacoustic device, and amplified by an audio frequency amplifier, and the oscillator generates a high-frequency equal amplitude oscillation signal; The modulator makes the high-frequency equal-amplitude oscillation signal modulated by the audio signal; The modulated high-frequency oscillation signal is amplified and sent to the transmitting antenna line, which is converted into radio waves and radiated out .......

The reception of radio signals is achieved by radio. The receiving antenna of the radio receives radio waves from the air; The tuning circuit selects the signal of the desired frequency; The geophone restores the high-frequency signal to an audio signal (i.e., demodulation); The audio signal obtained after demodulation is amplified to obtain sufficient driving power. Finally, the ...... of the broadcast content is restored through electroacoustic conversion.

To sum up, the transmission and reception of radiocommunication (broadcasting also belongs to the category of radiocommunication) can be summarized as three opposite aspects of the conversion process, namely: transmission of information - low-frequency signal, low-frequency signal - high-frequency signal, high-frequency signal - electromagnetic wave, .......

Now Wang Mumu is directly on the transistor, and he artificially solidifies the communication frequencies of the transmitter and receiver, that is, it is not adjustable, and each machine has two functions: sending and receiving. In this way, to a certain extent, it is a radio group chat walkie-talkie group that spits N. Let's spit out N today, Wang Mumu wants to try the car, so early in the morning, the hand-held colored flags and telescopes at the foot of the mountain and supplemented by a telegraph will send an unprecedented first wave of the earth on this planet in the solar system.

Wang Mumu and his entourage, the soldiers were divided into six routes: Hudong all the way to Hutou Mountain (also known as Bankan Mountain) broadcast, Hutou Mountain is in the eastern suburbs of Taoyuan City, about 251 meters above sea level; The rest of the radio, Wang Mumu and Hu Sanniang's all the way is in the center of Taoyuan; The eldest princess was at home in Taipei all the way, and Yuwen Rounu accompanied her; Liang Shen and Shen Zhang waited in Taichung, Wang Mumu's industrial center; The four flowers are called Hu Cheng, who sits in the sky and listens to the monster in the sky, both public and private; Hu Erniang, little Helen and the four seabirds were riding horses between Taipei and Hsinchu, and little Helen didn't believe that people were moving fast, and the distant sound could follow them.

The appointed time was eight o'clock in the morning, and the first wave of the earth, which everyone had been waiting for, came.

Wang Mumu pressed the button and sent the call, because the current broadcast has set up a fixed communication channel, after a period of chatter, Wang Mumu took out the guitar and sang a song "Do you hear":

“……

Did you hear that? My restless heart?

Do you hear that? What to give you?

I've been bittersweet lately, and I want to share this song with you;

Do you hear that? Are you listening to the horn?

Do you hear that? Did I develop the radio wave patency?

Don't rush to answer, do you hear me?

……

I just want to hold you together, at any distance,

Very lucky, the wave is like a cloud,

Your sincerity will become a white snow,

I can perceive, clear and pure.

……

Did you hear that? My happy heart sings?

Did you get it? I wave the flowers for you?

I open a window that will allow the channel to contact us both.

Do you hear that? Are you listening to the radio?

Do you hear that? Do I own a radio fly?

Don't rush to answer, do you hear me?

……”

Hu Sanniang on the side was anxious and interjected: "Lord Wang, you sang wrong!" You can't sing 'don't answer in a hurry', you have to Hudong 'answer quickly'! Lord, why are you glaring at me? Oh——! I'm sorry, I forgot, Lord Wang, you said at home, when you speak, we have to be quiet, otherwise, Hu Dong will not hear clearly, right? Ouch, I've talked so much nonsense again, lord? You're not singing anymore? That! I got it! I sing! Come, let me get close to the microphone and sing: Hu Dong, listen! 'Listen to my voice quietly and ask you to guess who I am?' From Mary to Sunny and Ivory, hurry up and guess my name......"

At this time, the eldest princess, Yuwen Rounu, and Hu Nanbei who were in Wang Mumu's Taipei family, were first surprised to hear Wang Mumu's singing voice from the loudspeaker, instead of the monotonous and boring ticking and answering voice of Morse before; Then, Hu Sanniang's voice came, softly; Then, all at once, something came out loud: 'Guess who I am?' Because the eldest princess and Yuwen Rounu are in their own home, they are more relaxed, and they only need to use their ears to listen to the radio anyway, so they pull the three naughty little mischievous little tricksters in the family by their side.

Now, Wang Mumu's eldest son, Wang Zhongwang, saw that the third mother was not there, and the third mother in the bowl-like thing was asking people to "guess my name quickly", so Tong Yan Wuji immediately said: "Two tigers, two tigers, it's weird, it's strange, one is standing next to you, the other is hiding in the bowl, ah, it's strange......"

Now, all the way to Hudong in Hutou Mountain, I first heard Wang Mumu's affectionate singing, Hudong began to be moved, the first wave in the world, the prince sang with a happy heart, and the wave gave me the flower in his heart! It's so moving, anyway, the prince said, don't answer in a hurry, then I'll digest and digest it more and enjoy it.

Hu Dong was just starting to be intoxicated, and Hu Sanniang's voice came out of place: "Do you want to guess who I am?" ”

Hu Dong thought, Third Sister, it seems that there is no program for you today, why did you come to intervene again? Hu Dong just wanted to reply, huh? Why did you jump out of the voice of the king of kings again? The prince and the third sister are in Taoyuan, and the king of kings should be in Taipei? Two tigers? Is it really weird? Hehe, it's really strange today, what the prince said in the acting department is really good, he said, in fact, everyone will have a considerable desire to perform, if he is quiet, it is only because he has not met a suitable stage for him.

Wang Mumu was a little confused, why didn't Hu Dong reply? How did you jump out of the voice of a king of kings? Could it be that Hu Dong took the king of kings up to Hutou Mountain? Well, I'm afraid yes, isn't the king of kings singing about two tigers? So there are two tigers on Hutou Mountain?

Before Hu Dong could make a sound, another uninvited guest broke into the first wave of the world. Who? Little Helen!

As soon as I heard it, I knew that it was little Helen's voice: "Hey! Feed! The king of kings, my little brother, is really weird! It's weird! You don't see how fast I am running on my steed, and the wild fruit by the roadside is knocked down by me, and before I can touch the ground, I have run ten feet; The little flowers I threw are still floating, and I have lost their dust. But no matter how fast I run, this voice! It can't fall! I can't get rid of it! It's so weird! It's weird! ……”

Hu Cheng's all the way, today is very face-saving, his mayor participated in the world's first wave of testing, his test post is in the sky, so, he invited four flowers to sit on the monster, looking at Hutou Mountain, looking at Taoyuan, looking at Taipei, and looking at the little Helen and the second sister and the four sea birds who are galloping wildly. Just now, I heard Wang Mumu singing a love song to Hu Dong, how could there be his third sister's "Guess who I am?" all of a sudden. This seems to be understandable, since Wang Mumu's voice can fly from the sky, then the voice of the third sister who is with Wang Mumu can take a ride and fly together, which is understandable. However, my nephew Wang Zhongwang's little trick should be at home in Taipei, why did his voice fly? It's a bit confusing.

At the farthest point of this test, Taichung, one hundred and thirty or forty kilometers away, Liang Shen and Shen Zhang are also waiting for the world's first wave in Wang Mumu's industrial center. Liang Shen is very obsessed with Wang Mumu's latest full-body armor with a flying machine, although he has been working day and night, but the results of each day are clearly put in the clear. However, later, Wang Mumu personally went out and hid in the electrician's laboratory for several months with a group of little golden cats, as if he didn't see anything good produced. Later, they said that it was to get a broadcaster, and they tested it today, and they looked at the speakers and headphones, and they didn't know what kind of surprises they would bring to themselves?

At this time, Hu Dong's singing came. Wang Mumu and Hu Sanniang in Taoyuan heard it! The eldest princess, Yuwen Rounu, and the king of kings in Taipei heard it! In the heavens, the four flowers heard! Little Helen and Hu Erniang, who were running wildly, heard it! The two Shen and Shen Zhang in Taichung also heard:

“……

You want to sing me to you,

Xie Dianbo can speak,

Words are like flowers,

Decorate your years and my branches,

Who can take your place,

Love while you're young,

O dearest people,

The distance is far and near, but the heart is together,

I'll sing it to you......"

Hu Dong's singing voice completely reassured Wang Mumu that this test was successful! This broadcaster was a great success! This electronic technology landed in the 11th century success! Ha ha! Then, let's continue to broadcast the broadcast:

“……

The microphone is like a bean sprout, the headphones have been stretched out, and I am waiting for the sound to come.

The distance is meaningless, fly over China and abroad early, you are wonderful,

The secret is in the plane, the dense fog can't be dispersed, and it can't be seen clearly.

You can't hear it, the wind doesn't exist, it's the waves in the sea,

Dream wakes up, who is on the radio, opening the world,

The mountains and seas that are thousands of miles away can't stop the new radio station,

I'll send you away, thousands of miles away, and you don't need a monologue

The age of silence is no more, and we can talk on the airwaves,

I send you away, and the airwaves know you at the end of the world,

Where does the electric sound come from, the song riddle is difficult to guess,

With your ears, go and wait for ......"

Wang Mumu's singing voice is not finished, it is still winding around the beam, and a milky child's voice suddenly came out of the speaker, it is the king of kings, very angry and emotional, how can the third mother and father treat me like this:

“……

Am I the person you love the most?

Why don't you speak?

It makes me sad that you hid in a swarthy bowl and refused to come out

Am I the person you love the most?

Why don't you speak?

When I want you, you hide in the bowl and don't say ......"

Yuwen Rounu was singing and explaining to the king of kings, and as a result, it was also broadcast over the airwaves:

“……

The king of the naughty Great Treasure Kings,

No matter how strong I am, I didn't hold you,

Your dad sings the test song in the corner,

No matter how loud it is, it's all for you,

Please listen attentively and don't speak......"

Yuwen Rounu's persuasion did not win a big victory, and the king of kings was still entangled: Am I the person you love the most?

Okay, high-tech is good, reinforcements to deal with the king of kings came, and little Helen's voice sounded on the radio, persuading: "Hey! The king of kings, the king of the kings, the child doesn't understand, right? Your dad isn't in the bowl-like speaker, the horn is just your dad's voice, how can we not love you? You are my little apple, how much I love you is not too much, the red little face warms my heart, lights up the fire of my life, you are my little apple, just like the most beautiful cloud in the sky, spring has come to the hillside full of flowers, plant hope will be harvested! ……

Okay, okay, don't be upset, when the big sister comes back in the evening, I'll bring you a pair of little orioles, okay? But now you have to be obedient:

We obediently agreed

Play obediently and be obedient

Obediently in a good mood

The sky is full of stars

will guide you step by step

I'll bring the little orioles

Give you your good ......"

The king of kings was very happy to hear that little Helen would give him a little yellow bird, so the children's nursery rhyme was appreciated by everyone again:

“……

Ah Shu Ah on two oriole birds

Ah, hee, hahaha, laughing at us

It's still very early in your hands

What are you smirking at now......"

The eldest princess watched her precious son happily go to the two younger sisters to show off, alas! Sighing, he whispered:

“……

You are such a villain

Let me rejoice and let me grieve

Let me be willing for you

Give me everything

……”