All teachers have a transparent shield on their bodies, and through the shield, their people seem a little distorted.

Jiayi also held a shield, and the shield was undetermined and looked a little fragile. Everyone had shields on them, but it seemed that someone's shield was not effective. Even with shields, they covered their ears with their hands.

Jiayi used his hand to clean his ears and felt much better. He breathed a sigh of relief and opened his mouth to speak, but suddenly he remembered that his shield was a vacuum shield, which was used to sound insulation and could not speak at all.

It was just twelve o'clock, and the clock tower was officially launched. Because it was twelve o'clock, it was just when the main bell was ringing. No one of the teachers reminded everyone that everyone was under the bell. When the main bell rang, it was like a firecracker was placed in his ears, and the explosion made the whole person misty.

This was not a teacher's negligence, because one second before the main bell rang, all the teachers raised the shield at the same time, and it was the kind of shield with a vacuum layer outside the shield, specially used for sound insulation. Jia Yi was already mistyly bombed, but when he saw Orlando and his operations, he also reflected on it and struggled to support the sound insulation shield.

Fortunately, when Jiayi invented the sonar detection array, Orlando taught him how to transform ordinary magic shields into soundproof shields when he showed him his shortcomings. Otherwise, now, if you are anxious, you can only hold up the shield like other students, and you can only cover your ears.

It is not difficult to add a vacuum layer to the outer layer between the spell shields. Even a junior mage can do it for a while, which has led to the decline of sonic spells, and almost few mages will learn it. If the monsters were not good at this method, it would be useful when cleaning up some small and large-scale monsters such as bats, and this kind of spell was almost eliminated.

It is also because of the relatively few such spells that ordinary students will not list this spell as the most preferred spell to learn. After all, it is simple to learn and has few uses. Just prepare in advance when needed.

The effect of vacuum blocking sound is really good, and this shield does not even need to be made very reliable, because the sound cannot break through the vacuum layer at all. When it hits the shield used to rely on the vacuum layer, there is no need to consider whether the shield will be shattered by the sound. This "spell" cannot even be regarded as a real spell, but can only be regarded as a spell casting technique.

But now, under the bell, people who have not learned this spell casting technique are in trouble. No matter how simple the technique is, they cannot be used without practicing it in a hurry. Not to mention that under the bell, people without shields have begun to be dizzy and cochleas are beating. How can they be used to cast a vacuum shield?

Some students didn't even think of the vacuum shield at the first time. They were anxious and saw that others could only use the shield they were most familiar with, and they thought someone had attacked them.

Fortunately, the bell only rings twelve times, and not everyone knows the skills of vacuum shields. Only four or five unlucky people suffer the most. After covering their ears for a while, they pass. However, even if the sound is heard, these students who are not protected by vacuum shields are tinnitus and chest tightness, dizziness and dizziness. High-intensity sounds can destroy the cochlea and make people feel unbalanced. If it is on Earth, it may lead to permanent hearing damage, but in this magical world, just a dose of potion will be fine.

After the bell stopped, everyone removed the shield. All the students looked at the teachers in front of them with anger and said no. Even the students who used soundproof shields suffered a considerable loss when the bell sounded. If they reacted a little slower, they would still bear the second one.

Jiayi looked at Orlando pitifully, feeling that he had been a fake teacher, without any reminder. He just asked him what the special effect of the master clock was, but it wouldn't be loud.

"Teacher~~~" Jia shouted out, his voice was sad and gentle, and he felt like he had suffered all his grievances.

Orlando felt embarrassed for a moment, but it disappeared in a flash. What the apprentice used for is just for fun? Otherwise, how boring life would be.

However, it is necessary to comfort it. Orlando touched his chin and said, "Haha, this is to train your reaction ability. Look at so many of you, but none of you remembered the problem of the sound of the clock being too loud and avoided. There are so many people who don't even master the vacuum skills. This is too inappropriate. Although sound wave spells are relatively rare, it does not mean that there are no one. You are still a little lazy, hoping to learn from the lesson."

Jiayi turned the roll of his eyes out to the teachers in front of him. If it weren't for their misleading, no one would have thought of the problem of Zhongsheng. It was just that the teachers were all here and there were no prompts at all, so everyone followed the teacher's reaction. But they didn't expect that they were so thief. The shield was raised a second before Zhongsheng remembered. When Jiayi and the others reacted, they had already endured the first wave of magic sounds.

"Teacher~" Jia Yi's voice came faintly, as if he was acting in a horror movie again, "Didn't you tell me that the effect of the main clock will be known when it rings? But I didn't feel anything."

"You guys, don't pay attention to it."

Hearing Orlando say this, Jiayi felt that his eyes rolled too much and could not turn them back. He was too busy blocking the sound just now. Do you still have to listen carefully?

Orlando ignored Jiayi's eyes. Anyway, there were not one or two people rolling their eyes and whispering to them now. Just write it down and take it slowly. He continued: "The sound of the main clock is clear, and the effect is far away. Don't look at the sound here, but you won't feel noisy under the tower, and the attenuation is small. Even if the lake is more than ten miles away, the sound can be heard very clearly. Moreover, this sound also has the effect of expelling monsters and suppressing some negative energy monsters."

"Dispel the monsters, so tenderly drive out the sea dragon?" Jiayi was a little curious. He originally thought that this effect should have been added after encountering the sea dragon, but after thinking about it, the sea dragon only encountered it after the bell was cast. Should I say that the academy is quite visionary?

Orlando said: "If it is a rational sea dragon, it will probably be expelled. The bell will make the monster feel uncomfortable. The bigger the monster, the more uncomfortable it will feel, and then stay away from the source of the sound. But this is not lethal. If a monster can tolerate this noise, then expulsion will be ineffective for it."

Jiayi felt a little disappointed. The effect did not look so powerful and the price was so expensive. However, when I think about the original effect of this thing is to report time, I don’t feel it too difficult to accept.

"Now the clock is connected to the academy's warning array. If there is danger, then all the clocks will remember it together. You must remember this. Although no one dared to attack the academy for hundreds of years, it is not impossible to have a crazy sea dragon again. Although the sound of the main clock has the effect of expelling the monsters, it may also anger the monsters." Orlando continued.

Jia nodded and said that he knew. He looked back at the big clock above his head. If there were more, he could form a set of editor's clocks, although the two actually didn't look like each other.

Orlando seemed to see that Jiayi was not very satisfied with the effect of the main clock and said, "The addition of these functions on the clock is just to add icing on the cake, and he does not expect these functions to play a big role. The protection of the college has always been a whole, not a clock or a magic circle. However, these clocks do have some other functions, and you will slowly discover them in the future."

Jiayi was speechless. This sentence was the same again. You should have forgotten what functions the main clock has.

Now that the clock tower has been officially operated, everyone has relaxed, and finally something has come to an end. Jiayi and the others looked at each other and seemed to smile. They patted the main clock for a while and slowly left.

Before leaving, Orlando called Jiayi and said, "Jiayi, come to my office tomorrow, I have something to tell you."
Chapter completed!