“...... Sound waves travel in all directions with the help of various mediums.

Sound waves are usually longitudinal waves, but also transverse waves, and the particles where the sound waves go vibrates near the equilibrium position in the direction of propagation.

The propagation of sound waves is essentially the transfer of energy in a medium......

When a normal person speaks, a sound wave is generated, which is relatively small and softly transmitted to the human ear through the air, and once the voice is torn open, the human ear will not be able to stand it......

If you want to know more, then go to school and learn physics. ”

"Yes, I would love to go, thank you for your answer, Bluebird Boy." Wei Yang said.

"You're welcome," said the boy named Bluebird, "but now that you have developed a bright golden voice, this is first of all unusual for ordinary people. But that's not a good thing, and certainly not a bad thing. ”

"What exactly?"

"That's right, let's talk about the good aspects first." The boy named Blue Bird explained, "First of all, this voice can make you famous quickly, that is, through one thing, the people of the village will soon know you and be impressed by you, so that once you become famous, the road will be much easier in the future." ”

"Hmm."

Secondly, the sound is also a good way to vent emotions. You must know that you are now deaf and mute, and you will not be like a normal person, after being wronged or stimulated, you will face the sky or the sea and shout, 'I want to be something, I want to be like whoever I want, what I want', and you can only 'sigh', repeating this tone vigorously, so as to achieve the effect of catharsis. ”

"Hmm."

Finally, the sound is helpful for your daily life and social experience. He can effectively protect you and your family, he can threaten people with bad intentions, people who want to encroach on your rights and interests, etc., specifically, in life, you can feel it slowly. ”

"And, what about the downsides?" Weiyang asked anxiously.

"As for the bad aspects," said the boy named Blue Bird, "there are many bad aspects, first of all, it is obvious that it can make fragile things broken, which can lead to some unnecessary economic losses, for example, window glass, especially rural people, if it is broken, they may not be able to replace it with a new one, glass is used to block the wind and rain, once broken, life, will always bring a lot of inconvenience."

Of course, in addition to glass, there are bowls, ceramics and so on, if you think about it, if it breaks, what will you do with those people? ”

"Are you saying that my voice can still shatter ceramics like bowls?"

"That's right, it's fragile or something."

"Tut-tut......"

"And secondly," said the boy named Bluebird, "your voice can hurt the eardrums of men, and in severe cases, even deaf them, even the eardrums of animals." ”

"Hmm."

"Finally, your voice has the flaw of destruction. For example, ruining a speech, ruining a celebrity's concert, is like a-stirring stick, making it unable to progress as scheduled.

Of course, there are many, many disadvantages, disadvantages, I mean, but anything that goes against the grain in this society is its disadvantages, its shortcomings. ”

"Basically," said Miyang reluctantly, "but I still don't think I know much about my own voice, as if I don't know much about the world." ”

"Yes," said the boy named Bluebird, "because you have been locked in the yard by your mother since you were a child, you have very few contacts, you are withdrawn, you have no friends, you have not seen the big world, and the scope of your knowledge is only your small yard......

Moreover, you are still deaf and dumb, so this time the door to your understanding of the world is closed. ”

"Yes, there are many things I haven't seen."

"Your ears can't hear sounds, so you don't know that there are the most beautiful children's songs in the world, you don't know that human beings have the most beautiful voices besides your own special voice, you don't know how cuckoos and pigeons chirp gently......"

"I also seem to have a problem with my mouth." Weiyang said curiously.

"The only downside of your mouth is that you can't speak, you don't know the pronunciation of the most beautiful Chinese characters in the world, so you can't communicate with people normally."

"Well, I don't want to know that much now," Wei Yang touched his head, faintly feeling some pain inside, "I feel like my brain is about to be filled with something, and there is a feeling of swelling in it like fire." ”

"Because you know too much knowledge," said the boy named Bluebird, "if you can't dissolve and digest it in time, it will be difficult to put new knowledge into it." The brain itself is a container, and no matter how good it is, there are times when it is full. ”

Weiyang stopped talking until there was no child carrying a schoolbag to school in the crack of the door.

After a while, Weiyang felt that he was finally better.

"Can we talk about it now?" Weiyang began to ask, "Tell me about my voice." ”

"Of course, whatever you want." Said the boy named Bluebird.

"You've analyzed my voice for me, so I'm wondering, what do I do, no, I mean, what can I do to control my voice?"

"That's a good question," said the boy named Bluebird, "but to learn more and be more scientific, then we have to go back to science."

First of all, you have to know what sound waves are, as I just said, sound waves are the propagation of vibrations produced by sound emitters in the air or other substances.

Whereas, sound waves can be understood as the propagation of small perturbations of the medium that deviate from the equilibrium state.

This propagation process is only the transfer of energy and does not take place the transfer of mass.

If the amount of perturbation is relatively small, then the transmission of sound waves satisfies the classical wave equation, which is called a linear wave.

If the disturbance is very large, then the linear acoustic wave equation cannot be satisfied, and then the dispersion of the wave and the shock wave will appear.

So, here's the problem, if you want to control the amount of disturbance from getting bigger, try to restrain your own voice; On the contrary, if you want to make the disturbance larger, then you have to tear your voice away, the louder the effect.

And in order to control the sound wave without harming people or objects, then you have to change the medium of its propagation, for example, with a piece of wood, an iron rod, or with a horizontal plane, etc.

Of course, the distance between the two, as well as the direction, is also the key to the problem. ”

"Oh," nodded as if he didn't understand, "I think some of what you're talking about is really profound, and some of it is much simpler." ”

"So, you still need a lot of knowledge to fill your brain right now. Because you are now deaf and mute, then you have to make full use of your eyes to learn, spend ten times more time and effort than others, learn all kinds of knowledge through your eyes, and thus fill your brain little by little. ”

"Thank you, I will, I will."

"You're welcome."

"Finally, I wanted to know how I could improve the quality of my voice in the future, that is, to make my voice more intense."

"There is no shortcut to this, only hard workout, through your emotional catharsis, because, only if you are truly emotionally vented, then your vocal cords will give full play to their potential, so as to get a special exercise.

Of course, you can usually exercise by screaming when you have something to do, but it is very difficult to break anything other than fragile items.

If you want to work out when you have nothing to do, I think you're going to have to do at least 800 years. ”