Just as I was about to slowly carry Ruohan back to the bed. At this time, there was another gust of wind, and I was right by the window, and I felt it clearly.

"Huhuhu... A gust of wind skimmed. Not only did I feel very energetic, but I also woke up Ruohan, who had just fallen asleep.

Ruohan was agitated at first, and naturally hugged me tightly.

I hurriedly patted Ruohan's shoulder and said, "Don't be afraid. Don't be afraid.. It's just a gust of wind. ”

Ruohan rubbed his eyes, knowing that he had fallen asleep just now.

Ruohan was about to speak. The strange ghostly scream just now began to sound again.

"Buzz .

This time it's a long time. And it's loud too.

Ruohan hugged me tightly, his eyes closed, and he didn't dare to open them.

Ruohan closed his eyes and said, "Forward... ”

"Don't be afraid..."

Maybe Ruohan spoke louder. It woke up the rainforest. When Rainforest woke up from his sleep, the first thing he did was to rub his eyes naturally, and at this time Rainforest probably heard this ghost scream.

Rainforest said without thinking, "Wipe it." Who doesn't sleep in the middle of the night.,In the ghost screaming.。。 I'm not afraid of being beaten. ”

When Rainforest said something unconsciously, it didn't take a moment for Rainforest to feel that what he was saying was wrong. We are in the dormitory, and this apartment number six is occupied by two bedrooms, who will not sleep in the middle of the night. And we're here to investigate the incident.

When the rainforest woke up, the rainforest felt a chill down his spine. Rainforest shouted sluggishly, "Forward. . . Iron Dragon. Dead Charlie Ba. Where are you? ”

Sun Tielong said behind the rainforest: "Don't call. We're all in the same room. ”

Then in the moonlight, the rainforest saw Sun Tielong, me and Ruohan. Rainforest felt relieved.

Rainforest shuddered and asked, "This... What a sound ... Why is it so strange. ”

Sun Tielong said: "This may be the legendary ghost laughing, ghost crying. ”

Rainforest said: "Wipe it. . . What are you waiting for? Let's go. ”

I looked at the rainforest and said, "Don't be scared, calm down." ”

I stood up on the bed and listened carefully to the voice.

At this time, Rainforest said, "Wipe it. . . It's scary. ”

"Shut up. Don't talk... ”

I shouted at the rainforest, not very loudly, but the rainforest could hear it clearly. Although Ruohan was also more scared in his heart, Ruohan was more sensible and knew that I was thinking about this ghost scream. Ruohan came to the side of the rainforest and hugged each other tightly.

I was at the window, and Sun Tielong also stood up and stood at the door. Sun Tielong and I both closed our eyes and listened quietly to where the sound of this ghost scream came from.

After a while, the cry disappeared again. I hurriedly jumped onto the windowsill, and I stuck my head out and looked downstairs. I could see very clearly that there was no one downstairs at all. I turned my head online and looked at it, and it was still the same.

I jumped onto the windowsill, and I was so frightened by the cold and rain that I quickly rushed to my feet on the bed.

Ruohan hurriedly rushed to my side, not only was he not afraid, but he also grabbed me tightly, and Ruohan also said, "Forward. . . Advance.. What are you doing.. ”

I slowly turned my head and looked at Ruohan. Looking at Ruohan and the nervous appearance of the rainforest. I thought to myself: Do you think I'm going to do something weird?

I slowly rushed down the windowsill. I said to Ruohan, "It's okay. It's okay... ”

Rainforest yelled at me, "Wipe it. . . I thought you were ghostly. I'm going to jump off the building. ”

"Go to the side. You are also a master of free fighting, a master of fighting. Why is it so small, I am not as good as a powerless person like me. ”

Rainforest said: "Rub it." It doesn't matter if this fight is bad or not. Usually fights are also fights with people. This time it's different. Mysterious. Who knows if it's a human or a ghost. ”

"Rub. I can't stand you. ”

I hurriedly looked at Sun Tielong. He asked Sun Tielong, "Tielong, do you feel that this voice came from here." ”

Sun Tielong looked at me and replied, "I'm not sure, sometimes it feels like it's in the wall, sometimes it feels like it's overhead." It's impossible to know for sure where it came from. ”

"Sound is a sound wave produced by the vibration of an object. It is a wave phenomenon that spreads through a medium, air, solid, or liquid and can be perceived by the auditory organs of humans or animals. All sound propagation will have a propagation point, so when we are walking, someone calls you, and they will definitely know the source of the sound. That's why I turned my head to look at the source of the sound. ”

Rainforest said, "What a mess. Let's get out of this hellish place. ”

"Why do you want to run at a critical moment? Aunt Liu on the first floor will lock the door downstairs after nine o'clock, even if you want to go out. I can't get out. ”

Rainforest said: "Wipe it. . . That's right.. I've also stayed in dorms. I forgot about it. ”

"If you want to leave now, I won't stop you. You can jump from the fourth floor. ”

Rainforest looked at me and said slowly, "Fuck your uncle." Get out of the way. ”

As he spoke, Rainforest pulled Ruohan back to his bed.

Sun Tielong looked at me and said, "What should I do if I move forward?" ”

"I don't know, but I've always felt strange, but I can't tell where it's strange. Grandma's. ”

Sun Tielong said: "This voice is indeed a little strange. I don't even feel like it's coming from nowhere. ”

"yes. . . I'm just thinking about it again. ”

Sun Tielong said: "This kind of voice is like in a ghost movie." ”

"What. I haven't seen a ghost movie. ”

Sun Tielong said: "Before someone in the movie encounters a ghost, there will be some strange sounds, and the strange sounds are basically super scary rhythms, the first is to make people feel a sense of fear, and the second is also the most wonderful, that is, you can't feel which direction the sound is coming from." Only the moment when the ghost comes out to kill will the terrifying sound be transmitted. ”

"Rub it. I don't understand... What does this mean? ”

Sun Tielong said: "I listened carefully just now. If it's not a natural reflection, someone is pretending to be a ghost. ”

"Whether someone is pretending to be a ghost, I don't know. The only question I have now is how this sound is produced and how it is propagated. ”

Sun Tielong said: "You also said it just now, this voice is simply too strange. The propagation of sound requires a medium, which can be air, water, solids. The speed at which sound travels in different mediums is also different. The propagation speed of sound is related to the counterbalance force of the medium, which is that when a molecule of a substance deviates from its equilibrium position, the surrounding molecules will squeeze it back into the equilibrium position, and the greater the counterbalance force, the faster the sound will propagate. Water has a greater counterbalance than air, and iron has a greater counterbalance than water. The propagation of sound is also related to temperature and resistance. Sound can also be refracted by external materials, such as when a person shouts in front of a mountain, he can hear his own echo. The sound at night travels farther than during the day, because during the day, the sound encounters the rising hot air, which quickly refracts the sound into the air. When the cold air descends at night, the sound will spread slowly and calmly on the surface, and it is not easy to refract. ”

I lit a cigarette and listened to what Sun Tielong told me, and I felt as if I had thought of something. But nothing came to mind.

In an instant, the dormitory was quiet again. After a while, we all heard Charlie Baba snoring.

"Whew. Call.. Call.. ”

Charlieba's snoring sound was also peculiar enough, and what he didn't expect just now was that the ghost scream just now didn't say anything, and after a while, Ruohan's cry woke up the rainforest, and the rainforest also screamed a few words. Charlie Ba can still sleep peacefully. And he was snoring, which had to be admired. Sun Tielong and I looked at each other and smiled.

Yulin scolded at this time: "People who have no heart and lungs sleep extremely steadily, even if the house is on fire." The lightning flashed and thundered, and he still slept like a dead pig. ”

"Isn't Charlie Bull heartless? I don't think so. ”

Rainforest said, "What's going on?" We're here to investigate, not to play. Sleep more than anyone else. Really. In case the ghost comes. Eaten by a ghost. Charlieba, the calf, didn't know how he died. King Yama asked Charlieba, what are you dead about? Charlie Ba must have said to Hades for nothing, I don't know... You say an idiot is not an idiot... ”

What Yulin said amused me, Ruohan, and Sun Tielong.

"Alright. . . All right.. It's just over a little over now. It's just too early. So be it. Rainforest and Ruohan squeezed together and got it in a bed. You are also afraid of the province. ”

Rainforest looked at me and said, "I'm in the mood to sleep now." ”

Sun Tielong said: "Rainforest, if you really can't do it, you can just hug the dead pig Yes Charlieba." I can sleep well. ”

Yulin looked at Sun Tielong and scolded, "Let me be with that heartless person. Bah... ”

"Alright. . . All right.. Ruohan has class tomorrow. You two are lying on the bed. If you really can't do it, put on headphones and listen to songs. It's a bit better to estimate it this way. ”

When I finished, Rainforest thought it was a good idea. Rainforest and Wakahan were both lying on their beds. The two of them were lying in each other's arms, with a pair of headphones in one ear, playing songs and listening to them with the music player of their mobile phones.

After getting rid of the two beauties, Sun Tielong and I still sat on the bed by the door, and the other on the bed by the window.

I secretly said to myself, "Wipe it." How exactly this sound is produced and how is it transmitted? Could it be that there really is something in this world? I can't. I must have thought of it yet, and I have no way to explain it. ”

Sun Tielong looked at me and said, "Go ahead, throw me a cigarette." ”

I know that Sun Tielong usually doesn't smoke, even if there is something to worry about, that is, take a cigarette from me and taste it carefully. I didn't even think about it, and directly threw the cigarette in my hand to Sun Tielong.

Sun Tielong took out a cigarette from the cigarette case, lit it with the lighter in the cigarette case, and threw it back to me in its original state.

Sun Tielong said: "Don't worry. It's still a long night. I'm sure I'll find some clues. ”

I smiled and said, "yes. . . If one night isn't enough, there are still six days. Anyway, there are seven days. ”

Sun Tielong said: "Yes. . . Oh, yes.. Besides, we've solved a lot of cases together. There is not a single case that you have more than three days. Your strength is obvious to all. This time will be no exception. ”

"Huh. . . You... When did you learn the of Charlie Bully?。。 ”

Sun Tielong said: "What? ”

"Me. There are several reasons why we can solve the case. The first is good luck, and the second is that you have a few good helpers by your side. The third is to have friends with the police. The fourth is that I met Luo Ying by chance, which made the media hype all of a sudden. If there are no of these four. I would never have had such an expressive experience. Actually, I don't have that much ability. Aren't they all falsehoods? ”

Sun Tielong said: "You are too humble. ”

"It's not self-humility. It's all true. ”

Sun Tielong also smoked, Sun Tielong looked at my cigarette and said, "Wipe it." You're so rich. Why do you still smoke such cheap cigarettes? ”

"Changbai Mountain is still a cheap cigarette?"

Sun Tielong said: "What kind of good cigarettes are men smoking now... Who still smokes outdated cigarettes. ”

I smiled, "It's still good to be old." It's like a friend. The more time passes, the better the relationship. ”

Sun Tielong smiled: "Hehe. That makes sense. Reasonable... ”

Sun Tielong and I both sat there quietly, and neither of us spoke. They were all thinking about the ghost's scream.

April is not very cold either. Spring has already begun. The climate transition is just right. The only fly in the ointment is that sometimes there is just some wind.

I'm sitting by the window, and sometimes I can faintly hear that ghost scream. And it's intermittent, and there's no law at all.

I secretly said in my heart: Wipe it. No wonder the girls moved away. It's so steamy every night.,It's a person who feels tired.。。 Not to mention girls.

I always felt like I was thinking of something, but I always checked the Lingmen.

At this time I yawned.

Ruohan said to me, "Go ahead." You're not at the window. You just sit there. It's easy to catch a cold from the wind. ”

"Cold... Winded... ”

I didn't speak for a moment, thinking about something.

Ruohan saw me muttering something, and hurriedly continued: "Forward. . . Advance.. ”

I still didn't speak.

At this time, Ruohan was lying on the bed, and hurriedly sat up from the bed.

Wakahan said, "Forward. . . Go ahead. ”

"No. If it's cold, don't speak. I guess what came to mind. ”

Ruohan didn't speak when he heard me say this, and Sun Tielong also shifted his gaze to me.

Sun Tielong and Ruohan looked at me quietly, and I didn't speak for about seven or eight minutes.

I said slowly, "I guess I thought about how this ghost scream came about. ”

Sun Tielong said to me: "Forward, you have thought of it?" ”

"I'm not sure, but I'll have to wait for now."

Sun Tielong said: "Wait? What are you waiting for? ”

"Wait... I'm sure it won't take long. ”

Saying that, I had already begun to get up from the bed, just as a strong wind was blowing, I hurriedly said to Sun Tielong: "Tielong follow me." ”

With that, I opened the door to my dorm room and walked out. Sun Tielong saw me walking out. Sun Tielong followed me without even thinking about it.

I went all the way to the top floor except for the bedroom on the fourth floor. Sun Tielong has been following me.

There is a direct door on the top floor of Apartment Six, and you can reach the top floor of Apartment Six by opening this through door. This apartment number six is an old building. The top floor is a bungalow open-air building. I barely managed to open the through door, and climbed up the iron railing on the through door.

Sun Tielong said to me, "Go ahead." Be careful. ”

"Hmm... Got it.. Be safe when you climb. ”

Sun Tielong and I both climbed to the top floor of apartment No. 6.

Specifically, Sun Tielong and I are standing at a height of six floors. It is about less than twenty meters in height.

Although it was dark, I could see the moonlight clearly.

Sun Tielong looked at me and said, "Ah... Go ahead. I finally got it. ”

"yes. . . I just thought of it, too. ”

Sun Tielong said: "It seems that you have detected the secret of that ghost scream. ”

"yes. . . I was so lucky, I didn't expect Ruohan's words to remind me. I wondered why every time there was a sound, there was a gust of wind. When I came up, I found out that it was like this.。。 ”

Sun Tielong said: "Go forward." Now what. ”

"Nothing. Now you can sleep peacefully.。。 ”

Sun Tielong smiled: "Yes. . . It's time to sleep well. ”

That's when I heard footsteps downstairs. I stuck my head out and shouted straight to the door, "Who? ”

Who knew that the guy under the straight door was listening to me shouting. Hurriedly ran.

My instinct tells me that this is not a good thing。。。。。