Xiangkun's house is only 70 square meters, with two bedrooms and one living room. The balcony is not big, and it can be said that it is relatively narrow.

But the better thing is that the line of sight is not bad, far away from other tall buildings, you can see the mountains in the distance.

Xiang Kun didn't bring out the chair, so he just lay on the tile of the balcony - of course, the floor had been carefully wiped.

Under the night, Xiang Kun is in a particularly good state. His physical function has reached the peak. His sensory ability has been greatly improved after three targeted training after drinking blood for the last three times.

However, limited by the means of equipment, he has no way to make accurate tests and statistics. He used his mobile phone to download an app that can emit 1-22000 Hz sound, but this can only test the frequency range of the sound he hears, and still can't fully test his overall hearing improvement. He also used to refer to the fixed sound source, and then lengthened the distance to determine the farthest distance that could be heard. But this method needs a relatively fixed and stable environment, which is easy to be disturbed and difficult to test accurately.

The same is true of smell, which can only be tested subjectively.

Lying on the balcony tiles, Xiang Kun closes his eyes and relaxes his body muscles. He focuses all his attention on hearing and smell, mainly hearing and secondary olfactory.

For a moment, the sound is like a flood discharge from a reservoir. All kinds of noises are interlaced together, and so is the smell.

The human brain has a set of mature mechanisms for the processing of external information, which can be said to be a protection mechanism or a lazy mechanism.

When the attention is not on the sound and smell, although the auditory and olfactory organs have been collecting information, the information will be weakened, filtered or even blocked by the brain.

When the attention is focused on the sound and smell, it can focus and enhance the transmission of information according to the information the attention is focused on, so as to shield the other influences.

However, it is one thing to hear a sound, smell a smell, and lock in a sensory information. How to make a judgment through this sensory information is another.

It's like sitting at home and hearing a car whistling by.

If he was attracted by the sound, he would subconsciously see a car speeding on the road outside his house.

He was able to see this picture because he was very familiar with the road outside his house. He had heard the sound of cars and seen the cars galloping on the road outside the house.

If people who are more familiar with the sound of automobile engine and exhaust can even directly distinguish whether the car outside is a four cylinder or a six cylinder engine, whether it is a Ford or a Toyota, whether it is a broken diesel truck or a super run, the picture constructed in his mind will be more specific and rich.

The person sitting at home will recognize that the sound is high-heeled shoes when he hears the clattering sound of footsteps upstairs. If he has not seen the residents upstairs, he may have a picture of a young girl walking around in high-heeled shoes with long legs. However, if he has seen a 50-year-old woman upstairs, when he hears the sound of high-heeled shoes It's a picture of a fifty year old woman walking around.

The brain will carry out the necessary "brain replenishment" according to its own "database", experience, logic and instinct.

So it's one thing to be able to collect sensory information, and it's another thing to be able to really help the brain make judgments.

The reason why Xiang Kun lies on the ground directly is not that there are no chairs to carry out and no blankets to lay on the ground, but because in this kind of reinforced concrete building, besides air, the wall and ground are the main media of sound transmission. Therefore, it is easier to hear the sound of the whole building by lying on the ground and directly touching the ground.

After hearing all kinds of miscellaneous sounds, Xiang Kun carefully distinguishes them and slowly selects them. Starting with the voice nearest to him, the nearest one is 608 downstairs. It seems that a middle-aged couple are talking about their son who went to university in the north, while the news broadcast is on TV.

To the side, the next door is silent, there is no sound of footsteps, no sound of using electrical appliances, no voice of speaking, and no sound of breathing. But there is a sound of curtain blowing. It should be that the windows and doors are closed, but the host is not back.

Then he heard the voice of Liu Shiling, a little fat girl he had seen during the day, so he positioned her voice as 706 - he knew that little fat girl's house was 706.

Judging from the sound, the little fat girl and her mother are at home, her mother is urging her to take a bath, and she still stays in front of the TV to watch cartoons and refuses to move.

With 706 as the positioning point, Xiang Kun continued to distinguish the sound heard and make a judgment.

When he hears the sound of footsteps, he can judge where others are in the home, or even in what kind of moving trend, according to the structure of his home and other reference sounds, such as the sound of boiling water faucet, the sound of turning on gas and ignition, the sound of holding up a cup, and when other electrical appliances are turned on.

At the same time, he can also use smell to assist in judgment. For example, when he hears 402 people hitting each other and cooking and frying food, he can judge what the other party is cooking, and even can guess the taste.Moreover, the mutual verification of smell and sound can also help him determine the location more accurately.

As time goes by, from the outside, the lights of the whole community are gradually extinguished and reduced, and the voice and movement of each household are also gradually reduced.

At more than one o'clock in the morning, Xiang Kun opened his eyes, sat up from the ground and stretched.

He has made use of the sound and smell to "walk" the whole building. Although Liu Shiling, a little fat girl of 706, has actually met, told his name and known him, he has recognized almost everyone through his voice and smell that night, and even learned a lot about "secret".

Of course, Xiang Kun is not trying to find out other people's privacy, but training.

Just as his muscle circumference improved, he began to train endurance and agility. After his sensory ability improved rapidly, he needed to train his brain to process sensory information.

Just like two professional athletes with the same weight and similar muscle content, because they are engaged in different sports and have different training, the way of exerting force is also different, and the results of exerting force are naturally different. A professional boxer's punch is naturally heavier than that of a professional basketball player, and a professional basketball player's ability to complete a basketball action under the same level of confrontation is certainly stronger than that of a professional boxer.

Therefore, Xiang Kun knew that it was no use just to strengthen his sensory ability. He also needed to practice and know how to use this powerful sensory ability.

The first stage is to collect the "samples" of sounds and odors that were not available before, and establish a "database" to become the instinct of smell and hearing, and most of them have been completed.

The second stage is what he is doing now, how to use sound and smell to help Xiang Kun judge the surrounding environment and situation and become his "super eye".

Although it takes him five or six hours to "stroll" a building now, when he is familiar with it, maybe only a second or two, he can quickly locate anyone in the building by sound and smell, and even build a real-time holographic image of the whole building in his brain.

Xiang Kun has found that his brain is also evolving along with the evolution of his sensory ability. At least now, when he is immersed in various sounds at the same time, he will not have the feeling of nausea and dizziness at the beginning.

At 7:30 the next morning, Xiang Kun went out with his sports bag on his back and was ready to go to the gym. Although it was far away from the former gym, it would take at least 40 or 50 minutes to take the subway and then transfer to the bus, but he didn't intend to change places for fitness. After all, his membership card had already been applied, so he couldn't refund his money.

And he doesn't plan to go by car, but he is going to run directly. The process of running is also the process of training.

After going out, Xiang Kun happened to see that Liu Shiling of 706 was also going out. Behind her was a young woman with a plump figure and a score of 67, which should be her mother.

"Uncle bald!" As soon as Liu Shiling saw Xiang Kun, he ran over to greet him.

Hearing this greeting, her mother was immediately embarrassed and said, "Oh, I'm sorry, children don't know how to address them. Are you the new tenant of 708? After that, you will be a neighbor. If you need any help, just say so. "

Little fat girl runs to press the elevator. Xiang Kunze and Shiling's mother have a chat for a while. They know that they have only moved into 706 this year and bought a house. Liu Shiling's father is a project worker and is often away from home, while Shiling's mother is a full-time housewife, mainly with the only daughter.

Xiang Kun also made a simple self introduction, saying that he was a programmer and had worked for seven years, but he didn't tell her that he was still unemployed.

They didn't wait long. There were two elevators in one unit, and soon there was a down elevator.

Ding Dong, the elevator door opened, but a dog's head stretched out and was about to pounce. Standing at the elevator door, Liu Shiling, who was about to enter, was startled. She stepped back for two steps and almost fell down. Xiang Kun on the edge quickly helped her.

Looking back, there was a young girl in her twenties in the elevator, holding an adult husky. Husky was obviously very excited. As soon as she saw the elevator door open, she wanted to jump out. The girl was playing with her mobile phone, but she almost couldn't hold it.

“PINKIE! PINKIE! STOP! Don't move The girl took the dog in her hands and yelled.

But husky kept thinking about it, and the little fat girl outside the elevator was obviously scared. She looked timid and didn't dare to speak with Xiang Kun's thigh.

Shi Ling's mother obviously knew the dog girl and frowned: "Miss Yang, your dog should be pulled well. How can you do if the elevator is so small, the dog is so big, and the child is so small..."

Miss Yang took the dog and said without raising her head: "it's OK. Pinkie just wants to play with children and won't bite people. I'm holding it PINKIE! STOP! SIT! Quick sit

It was not the first time that Shiling's mother complained to miss yang. She knew it was useless. She pressed the elevator and said to Xiang Kun, "you go down first. We'll wait for the next one."Xiang Kun is holding the little fat girl's hand and walks into the elevator together.

Originally, the little fat girl was still a little afraid and refused to go in, but she saw husky, who was still very lively and wanted to attack, and Miss Yang could not hold on. At this time, she suddenly shrank behind Miss Yang. The dog's head was clinging to the elevator wall, and seemed to be shaking.

Xiang Kun turned back to Shiling's mother and said, "it's OK. Come in together."

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