The next day.
"Master, are you going out to sea to watch whales again today?"
Early in the morning, Wang Qian saw Zhang Zian pick up the heavy battery and walk to the Wuling Hong Guang MPV, so he guessed his intentions.
"Yes, that's right." Zhang Zian nodded, opened the door, connected the battery to the motor, and confirmed that the battery was fully charged.
"Uh …"
Wang Qian was puzzled. Although whale watching was elegant, it was fine to do it once in a while. Why did he have to go every day? Is whale watching really that interesting? It's not like I'm looking at beauties …
"What is this?" He picked up a long rod-shaped gray object and fiddled with it. He had never seen this thing in the carriage before, so it must have just been put in.
The long rod-shaped object had a rough surface. It felt like the sound pickup part of a microphone in a KTV. There were long gray wires coiled behind it, and the surface of the wires was covered with plastic.
"This is for underwater recording." Zhang Zian was afraid that he would break the precision instrument, so he took it from him and put it back in the car. "You guys look after the shop. I'll be back soon. If I don't come back, remember to call the police!"
Wang Qian looked constipated as he watched Zhang Zian drive away.
Li Kun strolled out from next door and approached him. "Senior Brother, Master has been driving a lot recently. We haven't touched the steering wheel for a long time. Our hands are all numb … By the way, where did Master go?"
"He claimed that he was going to record the underwater sounds, but judging from Master's expression, he seems to be lying. I suspect that he's just brushing me off and hiding some secret that he doesn't want to tell us …" Wang Qian frowned and pondered, his expression solemn.
"Oh? What secret? " Li Kun became spirited and nervously asked, "Is it the correct way to interpret the advanced animal taming technique?"
"That's not it … I saw that the thing in the carriage was thick and long, and it looked very advanced. It could be … the legendary uranium rod!" Wang Qian gestured.
"Uranium rod?" Li Kun was stunned. "Master, why did you get the uranium rod? Are they trying to stir up trouble? "
Seeing that there was no one around, Wang Qian said in a low voice, "Maybe Master is secretly raising a Godzilla in the sea …"
"Godzilla? Are you sure you're not secretly raising a Rotten Kun? "
"Quack! What did you just say? "
Richard flapped its wings and flew over. It was inexplicably excited because it heard Y as R …
Zhang Zian was very careful when driving today, especially after arriving at the beach. He slowed down to avoid damaging the valuable instruments in the car.
The underwater sound device that Professor Wei Kang had lent him was not an ordinary one. It was a high-end product that was used by the School of Underwater Acoustics at Binhai University for scientific research.
The underwater sound recorder was not as simple as recording underwater sounds. If that was the case, it could be bought on Taobao. It was a complete set of equipment that included a signal processing system. It converts underwater sound signals into optical signals and transmits them into the system through optical fibers. After that, it is modulated and enhanced to output a sound wave chart. It also converts sounds that cannot be heard by the human ear into audible ones for researchers to analyze. This system was expensive, and ordinary people couldn't buy it even if they wanted to.
Just like the day before, Zhang Zian inflated the assault boat and checked to see if there were any air leaks. He could not afford to be careless on the sea. One mistake could lead to eternal regret.
After checking that there were no problems, he carefully moved the equipment into the boat and pushed the boat into the sea.
With the heavy equipment ballast, the waterline of the assault boat was deeper than the day before. It was also more stable. He was glad that he didn't buy a small assault boat. Otherwise, it would be too cramped.
He judged the distance with his naked eye and stopped the boat closer to the shoreline than the day before. He picked up the gray rod-shaped underwater sound recorder. He didn't throw it directly into the water. Instead, he soaked the surface evenly to make sure that there were no bubbles on the surface to prevent sound distortion. He then slowly released the optical fiber cable.
The optical fiber cable was marked with a scale. Zhang Zian didn't know how deep the sea was under his feet. He temporarily released it for 50 meters. He estimated that it was almost at the bottom. If he released it too shallow, all he would receive would be noise from the water.
After he was ready, he couldn't wait to put on the matching headphones.
They were indeed high-end professional ears. The thick sponge fit the contours of his ears perfectly. After a little adjustment, he could almost completely isolate all sounds from the outside world.
He turned on the switch, and a real-time wave chart of sound appeared on the small display.
After the sound from the bottom of the sea was amplified, the moment it entered his ears through the headphones, he suddenly felt his hair stand on end. It was as if he was wrapped in a cold current. He curled his body tightly and shivered!
It was difficult to accurately describe the sound he heard. It was as if he was standing in front of an incomparably thick and vast stone door, watching as the stone door slowly opened and countless angel choirs surged out from the stone door, singing a magnificent hymn in unison.
His legs were trembling. If he wasn't sitting on the unstable boat, he might have knelt down on the spot.
The professional-grade underwater pickup and monitoring headphones sent all the sounds from the bottom of the sea within a radius of several kilometers into his eardrums. There were sounds from animals, sounds from ocean currents, sounds of propellers and motors, and sounds of distant storms and lightning and thunder. The sounds from high-energy storms could even be received across thousands of kilometers of ocean. In addition, there might be sounds from hidden submarines. It was just that limited by the processing ability of the human brain. All these sounds were mixed together, echoing repeatedly in his mind like morning bells and evening drums.
Occasionally, there would be a few strange noises in the magnificent hymns. Some were as sharp as a whistle, and some were as low as a sob. No one knew what made the noises. Maybe it was just the convergence of two ocean currents with different temperatures and densities, or a slight movement of the earth's crust at the bottom of the sea. However, these were all guesses. No one could be sure what it was.
The sounds of animals were the most insignificant among them. They were masked by other sounds, and often could only be distinguished when they were very close. Most sea creatures didn't sing. Among the sounds of animals, the sounds from whales and dolphins were dominant.
Zhang Zian moved the lever on the instrument in the direction of low frequencies to increase the sensitivity of low frequencies. He filtered out the high-frequency ultrasonic sounds from dolphins, toothed whales, and storms, and focused on listening to the language communication from low frequencies.
As he moved, the sound in the headphones changed again. The whole thing became quiet, and the magnificent hymns turned into rhythmic breathing.
Dong dong dong dong dong …
A series of rapid drumbeats sounded at a speed of about two or three beats per second. It sounded like the sound produced by a low-quality horn, and the sound was sometimes loud and sometimes soft. It meant that one or a few minke whales were wandering in the nearby waters.
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