Chapter XXXV, Results. Pen "Fun" Pavilion www.biquge.info

After some exploration, Yi Xiaotian has a deeper understanding of the basic principles of echolocation.

The reflection of echolocation sound waves after touching an object is usually narrow, or this phenomenon is most noticeable when there is an obstruction in front of it.

When Yi Xiaotian was a child, he also played the game of pick-up, ran to the top of the mountain, and then shouted at the people below, and after a while, there would be echoes coming over.

These echoes come back at different times, the volume of the sound is also different, and even, if you listen carefully, the nature of the sound in them is also different.

After testing, Yi Xiaotian gradually figured out the rules.

The time of sound transmission is very related to the distance of the object from itself, which is actually a conversion process, if quantized, it is the speed of sound and the time of propagation, and then divide by two, to get the distance of the object.

Of course, the propagation time is generally very short, especially in this kind of room, at the speed of sound of 340 meters per second, it can run ten round-trips in less than a second.

It is precisely because of the short time and the small sound that the echo play that directly leads to the return of the echo play being ignored, mainly directly overlapping with the original sound, and the interval between the two is too short, which is why in a narrow and closed room, the sound of speech feels louder than the volume of the open environment.

Yi Xiaotian uses a hearing aid to monitor sound, and the sensitivity of the sound signal is naturally unprecedentedly improved. Of course, this is not to say that the hearing of the human ear is not sensitive to the native system, it may be because of the need for essence, the human ear directly filters these invalid noises and blurs them.

The most typical example is a blind person like Jingjing, who has no vision, and their hearing will be increased accordingly, and they can hear sounds that ordinary people can't hear, which is equivalent to the human brain reopening the fuzzy filtering mechanism.

The hearing aid made by Yi Xiaotian is quite powerful, which can calculate the distance of the object reflecting the echo according to the subtle differences of the echo transmitted back, and can also judge the size of the object according to the change of its wavelength.

Finally, there is the nature of the object, which Yi Xiaotian has also made full preparations, the hearing aid can be distinguished by the amplitude of the sound, and the objects of different materials have obvious differences in the sound waves reflected back.

Distance, size, shape, material, these parameters are combined, and the surrounding environment can be clearly detected.

Once the experimental information has been collected to this extent, it is almost enough to move on to the next experiment.

Walking out of the door, the sky has already lit up with fish belly white, looking at the blue sky, breathing in the fresh air, although I haven't slept all night, but the beautiful day has begun again.

Early in the morning, the morning in the courtyard begins to become a little noisy, washing in front of the faucet, cooking in front of the stove, washing the car, it seems that everyone has their own things to do.

The plan of the day lies in the morning, and it is true!

"Yo, Uncle Li, your skills in making steamed buns are getting more and more superb!"

"Wow, Uncle Zhang, you got up early in the morning to make clothes!"

"Yo, good morning, old man!"

......|

After some greetings, Yi Xiaotian found Jingjing who was playing a game of peek-a-boo with Doubao.

Just wanted to say hello to him, the red fat man ran over, grabbed Yi Xiaotian's arm and dragged him away, saying that the big head was beaten!

"Oh my God, I've been beaten again!" Yi Xiaotian said.

The red fat man replied, "This time is different, they are bullied for doing good deeds!"

"Where?" Yi Xiaotian said helplessly, "My life is ruined by your hands, I have calculated, since I met you, it is really a small fight in three days, a big fight in five days, not to mention, this fucking has not been three days!"

The fat red man said, "Are you embarrassed to say that if it weren't for your idea, we would have fought?"

"It's none of my business!"

After the fat red man swore and swore the tent in the private room, the two of them moved towards the place where the incident occurred.

There is a small community hospital not far from Lao Cai, which is also the stronghold of the Red Fat Man's group! For this gang of people, fights and brawls are commonplace, and for this reason, the terrain here is also very familiar to everyone.

Yi Xiaotian rushed to the hospital and saw that the big head was lying on the hospital bed in a daze, with gauze on his head and his face covered with bruises.

When you enter the door, you ask, "What's going on?"

When the big head saw them coming in, he cried and laughed and said, "What the hell is the bandit giving you contact, I said a long time ago that you don't need to fight, but he just won't listen!"

"Nonsense, the bandit guy has muscles in his head, if you don't tell us about it, who will tell it?" Yi Xiaotian asked, "By the way, why didn't you see this bandit?"

"Go out and fetch water!" said the big head, "I'm fine, you go and go about your business!"

It was a small clinic, although there were not many people, but it was very mixed, and as soon as he said a few words, a middle-aged man who looked like a doctor walked in and asked him how he felt.

The big head said it was okay, it was much better.

"Young man, I have wronged you, in fact, you can ...... this matter" Before the doctor could finish speaking, he was interrupted by the big head, "Thank you, doctor, this is my belief in doing things, if there is a next time, I think I will also come out!"

The doctor didn't speak, smiled, and looked at Yi Xiaotian and the fat man.

The doctor was new and didn't know anyone. The big head hurriedly introduced, "My friend!"

"Hello, Xiao Chen was beaten by other people's families for righteousness and bravery, you have to comfort him!"

"We know!" replied the fat red man.

The doctor nodded, patted the big head on the shoulder, and wanted to say something, but then another patient came in, and in desperation, he had to leave the place.

As soon as the doctor left, the fat red man asked, "Woman?"

"Well, in broad daylight, someone actually bullied a woman on the street, is it tolerable, and then I stepped forward to stop it, who knew that the two of them were actually boyfriend and girlfriend. Big Head calmly recounted.

"Then, because you're nosy, the two of them have a mixed doubles!" said the fat red man gloatingly.

"No!" The bandit who finished the water came back and answered: "The little couple has been breaking up, and the man didn't agree, so the woman asked the big head to cooperate with her in a play, so he was mistaken by the man for the woman's junior, and the man with a green brain, in a fit of anger, he found a few people to beat him!"

Yi Xiaotian was curious, "Then you didn't him?"

"There are four people in the family, and the big head is only one person, and two fists are hard to beat four hands!" poured a glass of water for the big head, and the bandit said helplessly.

"And what happened later?" the fat red man was asking, when someone entered the door, it was a woman, who looked like a student. It's not very beautiful to look at, but it's a very attractive type.