Ultimate Wizard Chapter 287: Speaker

"Hello!"

Lin Tiancheng just gave a light feed. In an instant, the wind whistled at the bottom of the well, flying sand and rocks, and ripples on the tranquil water surface, as if he had encountered a substantive sound wave.

Luan Jingzhu felt as if someone had thrown a bomb into the well.

She gave a frightened exclamation and quickly covered her ears with her hands.

Lin Tiancheng himself did not expect the sound to be so loud, and was equally startled.

It seems that the speaker function, Lin Tiancheng guessed correctly, can indeed amplify the volume of his speech.

Usually talking on a mobile phone can only be heard when the speaker is not turned on, and the sound is only about 10 decibels. Turn on the external sound, which can reach about 40 decibels. A difference of four times.

If a normal person shouts loudly, it can reach 60 decibels, and then use a loudspeaker to amplify it, I am afraid it will reach a terrifying 200 decibels or more.

This is just a normal person, and Lin Tiancheng is no longer a normal person. If he turned on the loudspeaker and shouted at full force, even 300 decibels was possible.

You must know that 120 decibels is not acceptable for ordinary people. Staying for one minute can cause temporary deafness. More than 120 decibels can even cause a person to be permanently deaf.

What is the concept of 300 decibels?

Almost the sound of 30 tons of TNT exploding fifty meters away.

Lin Tiancheng was about to ask Luan Jingzhu to cover his ears, but a strange color suddenly appeared on his face.

Because the speaker is turned on, not only Lin Tiancheng's voice can be amplified, but the sound from the outside world is also amplified. The bottom of the well, which was originally very quiet, now sounds to Lin Tiancheng, but it is a colorful world full of vitality.

He could hear the chirping of birds and insects outside the well, and even the trickle of undercurrents at the bottom of the well. Every sound rang out in his ears very clearly.

"Jingzhu, Dr. Lin..."

Hearing this voice, Lin Tiancheng's face was overjoyed, and he said to Luan Jingzhu, "Did you hear it, someone came over."

Luan Jingzhu shook her head, her face blank.

Lin Tiancheng said to Luan Jingzhu, "Cover your ears, I'll call someone."

After thinking about it, Lin Tiancheng felt unsafe again, so he let Luan Jingzhu take a deep breath, and then sank his head into the water.

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Worrying that the loud sound might damage his hearing, Lin Tiancheng covered his ears, raised his head to the sky above the wellhead, and shouted: "We are in the mine."

Accompanied by Lin Tiancheng's 'I' exit, there was a strong wind that seemed to be visible to the naked eye, whistling and rushing towards the wellhead, the thorns and moss on the well wall, under the huge wind, tightly together attached to the well wall.

About two meters from the wellhead, an unknown thorn rose from its roots and went straight to the sky.

Outside the well is also a strong wind blowing sand and rocks.

In an instant, I don't know how many birds and beasts were frightened and fled.

In a short period of time, there was no bird or beast found near the wellhead, in a radius of 1000 meters.

It's four o'clock in the afternoon.

At noon, Miao Cuihua was a little worried when she saw that Lin Tiancheng and Luan Jingzhu didn't go home and the phone couldn't get through.

In such a hot weather, entering Tiger Ridge to collect herbs, I am afraid that there is a possibility of heat stroke.

After waiting for another two hours, Lin Tiancheng and Luan Jingzhu still didn't come back. Miao Cuihua didn't dare to neglect, and immediately mobilized the whole village to enter Tiger Ridge to search.

As soon as they entered Tiger Ridge, a group of people started shouting.

As soon as I didn't find it, a faint voice came from within.

"We're in the mines..."

Miao Cuihua's body froze, and her face suddenly brightened, she said, "It's Dr. Lin, did you hear that?"

"No, did you hear it wrong?" said an old man who was a little deaf.

Without waiting for Miao Cuihua to refute, many people said, "Did you hear? Someone called for help."

"I heard, in the mines."

Suddenly, another person's face showed a bit of strangeness, "Could it be that we heard it wrong? This is a deep mountain and an old forest. It's amazing that the sound can travel 100 meters. The nearest mine is also thousands of miles away from us. meters away, and he seems to say he's in the mine, is that possible?"

"We're literally in the mines..."

As soon as this person finished speaking, Lin Tiancheng's voice came over again.

Many people have heard it, everyone, look at me, and I look at you, with a bit of horror on their faces.

What did Dr. Lim just say?

Are they really in the mines?

Could it be that Dr. Lin heard what everyone said?

Only Miao Cuihua, because she was so anxious, didn't think much, she immediately said: "It's Dr. Lin. In the mine."

There are several abandoned mines in Tiger Ridge. After a brief discussion, everyone decided to split up and let experienced people lead the way and search separately.

In the mine, Lin Tiancheng was so concentrated that he could hear Miao Cuihua and others talking.

Lin Tiancheng finally breathed a sigh of relief when he heard that everyone had come over from several paths.

It seems that when the speaker is turned on, it can not only amplify your own volume, but also amplify the volume of others. Fortunately, when I cried out for help, I didn't feel sick.

Turn on the speaker must also consume power. Seeing only 3 remaining power, Lin Tiancheng turned off the speaker.

At the same time, I was a little disappointed.

If I had known that Miao Cuihua would lead people into the mountains to look for it so soon, I shouldn't have installed this speaker.

20 electricity!

I got a kilometer sound transmission function, and by the way, I got a downwind ear ability.

Lin Tiancheng felt a little tasteless.

It's just that the boat is done, even if the power is unloaded, it can't come back, so this is the only way.

Half an hour later, Lin Tiancheng and Luan Jingzhu were finally rescued successfully.

Seeing that Lin Tiancheng and Luan Jingzhu were in such a deep mine, many people felt incredible.

Some people said to Lin Tiancheng as if they were afraid that Lin Tiancheng didn't know. "Did you know? We heard your cry for help just now. It's so deep, so far away. We all heard it."

Lin Tiancheng thought that I had heard you guys talking, but he said, "Really? We should not die."

Someone shook his head, "We heard it from far away."

"Maybe it's my luck?"

People still find it difficult to understand.

Many people began to discuss why Lin Tiancheng's voice could travel so far.

Some people say that Lin Tiancheng's voice is loud, and some people say that Luan Jingzhu's deceased grandparents may have appeared.

For everyone's speculation, Lin Tiancheng reserved his opinion.

After returning to Luanjia Village, Lin Tiancheng taught Luan Jingzhu to stew a potion and planned to return to Fengcheng.

According to the current situation, if he doesn't break through the last step in a short period of time, it will be difficult for him to charge Luan Jingzhu.

He spent a total of 12 electricity on Luan Jingzhu's family, and recharged 21 electricity on Luan Jingzhu, earning 9 electricity.

Although it is said that Luan Jianxin's illness requires 5 electricity to heal, but after a while, Luan Jingzhu can be charged again.

It's just that Lin Tiancheng saw an acquaintance just after walking out of the door of Luan Jingzhu's house.

……