Stay away from Conan.

Chapter 45 The Invisible Weapon
When Gao Yuan understood the method of the secret room, he knew that Suzuki Sonoko was not simply missing this time, but was more likely to be kidnapped!If it was just a disappearance, I am afraid that even if the police were notified in such a short period of time, it would not be taken seriously, but if it was a kidnapping, the nature would be different.

Therefore, after Gao Yuan wanted to understand this, he immediately sent a text message to police officer Mu Mu secretly, asking him to bring someone over quietly-judging from the current situation, the other party should not have enough time to take him out of the school, but he was arrested. Where to hide, I still have no idea.

However, looking at the two girls from Didan High School, Gao Yuan was a little curious. If this method is used, it can be implemented at any time. Why do you choose to do it today?And today is the weekend, how can the other party be sure that Yuanzi will come to school today?
Suddenly, Gao Yuan thought of the situation when he met Yuanzi at the school gate before—Yuanzi heard that there would be handsome guys in this kendo competition, so he came to the school to watch it!And it happened that after Sonoko came, Kudo Shinichi went back.

kindness?Yup!Kudo Shinichi is back!
To say that the biggest difference today is that Kudo Shinichi went back first!As a premeditated kidnapping, and the target is a friend of a famous detective, then as the planner of the operation, he definitely does not want a famous detective to be present!

But Suzuki Sonoko was kidnapped, and Kudo Shinichi will eventually find out about this matter. So Kudo Shinichi's temporary absence can only help the initial action at most-is this important?
In other words, dare not implement this plan when Kudo Shinichi is around?Afraid of being seen through?As long as it is seen through, the plan will fail?If this is the case, then I have now understood the trick of the secret room, shouldn't I think about the whole thing more simply.

Before, what I thought about was that there might be an accomplice helping in the whole matter, taking Suzuki Sonoko out of the old school building, but it should be too late to send him out of the school.So I called the police over, but didn't dare to let the police investigate blatantly, because I was worried that Suzuki Sonoko was still in their hands, and if they acted rashly, it might pose a threat to Suzuki Sonoko.

But if you think about it more simply—could it be that people haven't been taken out of the old school building at all?
According to the current observation, in this old school building where only the art club has activities today, one entrance and exit has obviously not been opened for a long time, and the other is facing the playground. Even with helpers, it is difficult to take people out, so there is Maybe people are still in this old school building!If so, is a partner really needed?

"Have you checked all the old school buildings?"

Gao Yuan asked the two girls.

"Basically, I've searched everything I could find, but I couldn't find classmate Yuanzi."

Nakagawa Moemi said.

Hearing this, Gao Yuan pretended to be contemplative, and then said: "Well... that's it. At present, the possibility of Suzuki-san going to another place cannot be ruled out. Zhongchuan-san, why don't you go and look for it elsewhere. Ninagawa-san, take me to the old school building again."

"Ok."

Ayako Ninagawa responded.

"Why don't Caizi go to another place to have a look. I am familiar with this old school building, so I just need to look for it carefully."

Nakagawa Moemi said.

"That's fine too."

After receiving the answers from the two, Gao Yuan immediately turned around and walked towards the old school building, with his back to the two of them, a smile appeared on the corner of his mouth!
At this time, Fujimaru's family, Hattori Heiji and Kudo Shinichi have already arranged the facilities in the house and are ready to start the reenactment of the case.

"It's started! Everyone is optimistic!"

Hattori Heiji said, and put the baseball cap he was wearing backwards, back to the front, and then came to the mixer and played music.

The big stereo in the living room played loud music, which was the same as what everyone heard outside the house when the crime happened.

It's just that after a while, nothing happened.

"What's going on, Heiji. I just heard music, I didn't hear any strange sounds, and nothing happened!"

Yuan Shan and Ye Shang came to ask.

"What's going on! It should be this way!"

Seeing that the expected result did not appear, Hattori Heiji was also a little surprised. He put his hands on the mixer, looked at the various buttons on the mixer, and said inexplicably.

Kudo Shinichi, who was on the side, couldn't help but fell into thinking about such a result. Then, the two thought of something at the same time, raised their heads, and looked at each other.

"That's it!"

Suddenly realized, Hattori sighed.

Then Hattori and Kudo went in different directions. Kudo came to the mixer, while Hattori walked behind the wall with the artistic photos.

Behind the wall, on a shelf full of various audio equipment, Hattori found a speaker that was not connected to the power supply, and said happily: "It really is like this!"

On the other side, Kudo turned off the sound of the music in front of the mixing console.

"Why turn the music down?"

Xiaolan asked a little puzzled.

"Well, everyone, let everyone see it now!"

"The only truth!"

Hattori and Kudo sang together and said, making the two of them look at each other and smile.

Kudo controlled the button of the mixer and turned up the volume of a certain frequency band, but everyone heard nothing, but soon, an accident happened!

In the place of the original broken art photo frame, a repaired art photo frame of the hostess of the same size was replaced, and suddenly there was a vibration at this moment.

"Hey! Another superpower!"

Seeing such a scene, Xiaolan couldn't help but think of the live TV broadcast she participated in not long ago.

"Fool! How is it possible!"

Kudo said, "It's about to start!"

Then the volume of the frequency band was adjusted to the maximum, and then, the glass of the art photo frame shattered!All the shards of glass were scattered on the sofa.This scene shocked both Xiaolan and Heye!
"Why! You obviously didn't do anything!"

Xiaolan asked suspiciously.

"Natural frequency. That's how you break glass!"

Kudo explained, but some people present obviously didn't understand.

After listening to the statement, the police officer Miwako Sato understood the key point.

"Natural frequency? Is it resonance!"

"That's right. Everything has its own frequency of vibration. The music that's playing in this room has been added with a frequency that just strips the frame of the picture."

"In order to make it emit a specific frequency, the speaker that still exists behind the photo frame has been manipulated."

Kudo followed suit and explained the principle of the incident one after another, but Kazuha still didn't understand: "But I didn't hear any sound!"

"Fool. The sound over [-] Hz is inaudible to ordinary people!"

Hattori explained.

"The glass on the photo frame is like a swing in the park. The harder you push, the harder it shakes."

"Similarly, with the frequency of the characteristic, the vibration of the glass will become stronger and stronger. When it can't bear it, the glass will break! The prisoner used this invisible weapon to kill Miss Sunrise."

"And this invisible weapon is resonance!"

Kudo and Hattori spoke one by one, and Kazuo Fujimaru hurriedly explained: "Wait! I have never used this frequency before! And so far, this piece of music has never shattered glass!"

After hearing this, Hattori couldn't help smiling, "Of course! That's the person who knew you would use this song to cover up your affair, and made a CD with a specific frequency! Right, Toi-ryu!"

"That's right! The prisoner is you!"

Saying that, Kudo and Hattori pointed at the criminal at the same time - Fujimaru Yoshino!

(End of this chapter)