Chapter 917: Success

On a swaying boat, wearing earphones, closing eyes, weakening the connection between the five senses and the outside world to the limit, and listening intently to the sound from the bottom of the sea, the whole person seems to be slowly sinking into the bottom of the sea Surrounded by darkness, it seemed to return to the womb of the mother, and the body was suspended in the chaos.

The darkness makes people more focused, and the beauty of the underwater hymn makes people feel the passage of time. However, when the strange voice sounds around them, the eyes open involuntarily, and they return to reality in cold sweat. In the dark seabed, there is no need to think about what kind of monster made the sound just now.

If experienced teachers and graduate students of the College of Underwater Acoustic Engineering are here, using two or more underwater pickups, they can use the triangulation method to judge the swimming speed and direction of the target. I heard that senior submarine listening system officers and soldiers even It can identify the real body of hundreds of noise targets in a short period of time.

Zhang Zian is not that outstanding. He could tell that it was the singing of a minke whale, because the voice of a minke whale is very distinctive, and he knew that there were minke whales nearby. If it was a relatively rare whale, he would not be able to be the first It's time to hear it.

He listened for a while, and heard what he suspected to be another cetacean, but it was too far away to make out.

So he took off the earphones and hung them around his neck, and submerged the underwater speaker in the water, but not as deep as the underwater pickup, because the cable was not long enough.

He activates the speaker and starts playing Se-hwa's singing voice.

Every time he plays for a few minutes, he pauses, puts his ears back on, and listens to the sound of the seabed. If he doesn’t pause, because the speaker is too close to the pickup, Shihua’s singing will cover up all other sounds, and the result is that he can’t hear anything. arrive.

Yesterday he used Shihua's singing to appease the male minke whale, but unexpectedly the singing attracted the giant whale. Today he plans to do the same to see if he can attract the giant whale again.

This time he was mentally prepared, and he would never be suddenly attacked by that giant whale again.

The giant whale surfaced without warning yesterday, almost making him think it was a submarine from some country,

Because it must have swum deep in one breath, and there is no trace of it on the water surface.

That giant whale is not easy to get along with. If it gets close to a dangerous distance again, there is no minke whale to rescue him today. It is not a big deal for him to capsize and fall into the water. If these precious instruments fall into the water, he will have to send his pants to the pawn shop.

However, he has the weapon of an underwater pickup. As long as the giant whale approaches within a certain range, he can detect its arrival in advance and take countermeasures to escape.

To use an analogy, this is like a game of cat and mouse between a destroyer and a nuclear submarine, except that this destroyer is more timid.

This kind of thing is a test of patience. Think about the submarine sonar operators in war movies who often sit on duty for a long time, listening to the various sounds coming from the earphones, trying to find themselves before the sonar operators of enemy submarines. The other party, what degree of concentration is required? As long as the mind is distracted, the entire submarine may be sunk by enemy submarines.

Zhang Zian didn't have that patience and focus, but luckily he didn't need to listen for too long.

After about the third pause, a strange sound suddenly came from the monitor-grade earphones, mixed in with the brief pop of the minke whale, and if he hadn't been concentrating, he might have missed it.

There seemed to be more than one minke whale nearby. Their voices were chaotic and noisy, similar to bargaining in a vegetable market. I don’t know what they were talking about. However, when this abnormal sound appeared, the voice of the minke whale was like ringing a school bell, and suddenly fell silent. for a moment. Immediately afterwards, the voices of the minke whales burst out at a higher density, as if they were warning each other, for example, wolves were coming.

No way, although cetaceans have a certain degree of intelligence, they are still stuck in the era when communication basically depends on roar.

Zhang Zian pulled himself together, listened more attentively, wiped the sweat from his palms nervously on his pants, took a deep breath, and glanced at the handle of the motor.

He couldn't be sure if the sound came from the giant whale, or something else, so he could only continue to wait.

About half a minute later, the voice sounded again, closer than last time, and more clearly heard.

The target's swimming speed is very fast, and with the rumbling echo, a huge object like a train is approaching quickly.

Zhang Zian could almost imagine the gesture of a giant whale opening its mouth, swallowing all the small fish and shrimps along the road without distinction, and then discharging the seawater from its baleen.

On the contrary, the sound from the minke whales is weakening, and the number is also decreasing, as if they are moving away from the mysterious giant beast, not necessarily because they are afraid of it, but because it has eaten up all the food nearby, so that Other whales can only starve.

The sound was getting closer and closer, like a periodically changing siren, louder and smaller, even his eardrums vibrated with it when it was louder, but barely audible when it was smaller.

Zhang Zian frowned again and again, what was that sound? Is that giant whale?

He glanced at the LCD screen of the instrument. The instrument was automatically recording and drawing the waveform of the sound, but he didn't have time to look carefully at this time, because the target came very quickly. He wasn't sure if he had recorded a long enough sound sample, but he had to leave now, otherwise yesterday's scene might repeat itself.

He took off the earphones, quickly rolled the fiber optic cable, and lifted the underwater pickup up from the bottom of the sea. The 50-meter-long fiber optic cable can't be fixed so quickly, he nervously stared at the calm sea surface as he rolled it, worried that a huge submarine-like body would suddenly appear somewhere.

The underwater pickup was finally lifted out of the water with a bang, and some dark green seaweed was still wrapped around it.

He put down the pickup, started the motor at the fastest speed, adjusted the bow of the boat to the direction of 6 ground, turned the power to the highest, and the propeller started to rotate at high speed.

The Zodiac galloped towards the shore.

At this time, he was still not completely relieved, and looked back while driving.

puff!

Almost a minute before he left, a huge water column gushed out from where he was just now, rose to the highest point, and then fell to the water like a torrential rain.

The sea parted on both sides, and a huge body floated out of the sea.

Zhang Zian guessed that he had probably reached a safe sea area, so he slowed down the boat and picked up the binoculars to observe.

The giant whale flicked its tail and swam on the surface of the sea for a while like no one else was there. It seemed that it didn't find anything it was interested in. After taking a few breaths, it plunged into the water and disappeared again.

Zhang Zian finally heaved a sigh of relief. Firstly, he retreated because he "did" today, and secondly, because he confirmed that the source of the sound was the giant whale, not anything else. ...

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