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Brushing the steamed bun-shaped plastic object in his hand, Zhang Xuyao raised his head and asked, "This is the human head recording artifact that you have built for five years?" Are you sure you didn't dismantle the two headphones and use them to deceive me?"

No wonder she was surprised, it was really easy to think crookedly the appearance of this thing in her hand, the white plastic shell with rounded corners and rectangles arched at the back, printed with a stick figure pattern on the left ear of the human head, and the front edge was a soft sponge washer, with sparsely arranged round eyelets in the middle, which really looked like full-cover headphones with only two big bumps left after the head beam, but they were wider and taller and looked bigger.

Of course, there are still some differences in the details, there is only an opening in the power button on the object in the hand, there is no power knob, and there is no place to connect the head beam or hook or something, and some of the eyelets on the front are also covered with protective glass, obviously not all of them are horn holes.

Tang Jiayi picked up the other one in the box, rubbed her fingers against the pattern of the right ear of the human head on the back and said: "I didn't expect it to take five years, and the difficulty is greater than we imagined." ”

Head recording is actually very old, as early as 1969, the German Sennheiser company demonstrated the head recording technology called "Oscar". However, 46 years later, the former has become a world-famous audio equipment manufacturer, synonymous with professional microphones and headphones, while head recording is still a niche technology, for a long time there were only about 100 head CDs in the world, many of which were just test discs to demonstrate the technology.

The reason why Atletico Madrid is recognized as the first person in the industry to record heads is because he has expanded the number of related audio-visual resources dozens of times in one go.

There are not only live direct recording lossless digital music in cooperation with world-famous symphony orchestras and theater institutions, but also ordinary digital music, film and television dramas and games that are transcoded by DSP and expanded the sound field.

On the surface, head recording can rely on a pair of omnidirectional pickups to radio and a pair of headphones to play the sound, and you can achieve the surround sound effect that can only be achieved by multi-channel audio systems, saving time, trouble and money.

But in fact, this technology is a typical entry is easy to master and difficult to master, as long as there is a miniature microphone can make a simple model, but if you want to be really practical, you will fall into the pit of fidelity, and all kinds of complex calculations that you have tried to skip before will reappear, such as the occlusion of sound at different frequencies and loudness, the perception and adaptation of head movements, etc., or you have to fill in the holes one by one.

In particular, there is no algorithm formula for the head function, it is actually an empirical value obtained by comparing the number of false recordings jù with the number of ordinary recordings, and it depends on the fidelity of the false head, which needs to be repeatedly optimized to make it as much as possible in line with the actual situation of the human head.

This is also the reason why Atletico Madrid was able to quickly make a name for themselves in this field, and his head is a combination of real and fake heads.

However, the most troublesome part of the head function is that it is a rather personal parameter, and everyone's pinna has a high correlation with the shape of the ear canal, binaural hearing, etc., if it is not matched enough, the sound effect will be very weird, and it will even lead to adverse reactions similar to motion sickness.

This is also the main reason why film and television music and audio equipment manufacturers are not interested in the technology, the effect is not universal enough, the effect is very general to adapt to the crowd, it is better to concentrate on high-fidelity, users can not hear it can be justified and roar "fungus get rough away!"

Of course, it is not without solutions, the Bee head recording project team led by Atletico Madrid has developed its own "model head x private ear" model, with the help of the cloud number jù library to match the best head function for users. What the two women are holding in their hands is their latest achievement, the ERTF ear function tester.

"To put it simply, it is a miniature version and civilian version of the ear scanner you used before, used to measure the shape of the ear and ear canal, generate 3D information, upload it to the cloud and several modes of ears for comparison calculation, and then the system will send personalized parameters belonging to the user. ”

"There shouldn't be any of my own functions, right?"

As a joint benefit of being fooled by Atletico Madrid to contribute to scientific research, Zhang Xuyao is the third one with an exclusive head function.

"Isn't that nonsense?" Tang Jiayi also laughed angrily, "The cost of this ear detector is not enough to give you the money to do brain CT, and it also uses various general algorithms, and the effect must be much worse." ”

"The reason why I came to you today is that I need to let you experience and compare, see how much worse, and whether you can optimize and improve it. ”

"Eh," Zhang Xuyao's face suddenly collapsed when she heard this, it was difficult to go from luxury to frugality, and her ears were going to suffer today.

"I'm going to call the demon spirit, someone here is messing around with human testing without permission from the health department!"

"Xiao Yaoyao, don't be like this, everyone will remember your incomparable contributions, come and try it to see how the effect is." ”

Calling to complain about anything is just talking, in fact, Teacher Xiao Yao had already realized before she came, and soon she restrained her expression and asked, "How do you get this?"

"Pull your hair away and show your ears, I'll take this for you to test, you just hold still and wait a minute. ”

"Why don't you get a headbeam and let me wear it myself?"

"The engineering beta version will be just a moment, anyway, I will hold it for you," Tang Jiayi explained casually, urging the other party to start work quickly.

Reaching out and handing the left ear unit in his hand to the other party, Zhang Xuyao turned his back to Tang Jiayi, then raised his hands and pulled the long hair on both sides behind his head, showing off his fair cheeks and white and red ears.

Looking at the crystal clear ears in front of her, Tang Jiayi did not rush to buckle the ear detector in her hand, but instead grabbed the soft pink earlobe in front of her with her free right hand, rubbed it twice and quickly released it.

Before the other party turned his head to question, Tang Jiayi held an ear detector in both hands and accurately buckled it on Zhang Xuyao's ears, and at the same time shouted in his mouth: "Okay, let's go, don't move! Wait a minute!"

The time of 60 seconds passed quickly, and when she felt the pressure on her ears withdraw, Zhang Xuyao immediately turned around and asked, "Sister, why did you pinch my ears just now?"

There was not much questioning in the tone, it was more like a routine.

"I can't help myself, I said that Xiao Yaoyao's ears are so soft, it's so comfortable to pinch, haha!" While explaining, Tang Jiayi's right thumb and thumb were still gently rubbing, as if she was reminiscing about the feeling just now.

At this moment, Mr. Zhang, who was ashamed to fade, stopped doing it again: "You don't have ears, just pinch your own?"

"I'm a visual creature, and the pleasure of not being able to see is much lower than touching. ”

"Okay," this reason makes sense, Zhang Xiaoyao said that he was speechless.

"Didi!"

Putting down the instrument in her hand, Tang Jiayi picked up the phone to unlock it and looked at the content, and when she looked up again, she stared at the other party's right ear with a smile.

Subconsciously touched his right ear, Zhang Xuyao opened his mouth and asked, "What?"

"You have a large piece of earwax in your right ear...", as she said, Tang Jiayi handed over her mobile phone.

"Huh?" Teacher Xiao Zhang was dumbfounded, this machine can measure the 3D shape of the ear canal, if there is something in it, of course it will be swept out, if it weren't for the fact that she didn't have an ear scoop at hand, she would definitely lie down on Tang Jiayi's lap and ask her to help dig it.

Although experts say that cerumen does not need to be digg, and it is automatically discharged under normal conditions, Zhang Xuyao is still used to digging it regularly, at most paying attention not to dig too often so as not to hurt the ear canal.

"Haha, scare you!"

Zhang Xuyao realized that she had been tricked again, and she immediately pounced on her to give some color.

"Don't make trouble, don't make trouble," although Tang Jiayi tried her best to block, but the other party's height, body shape and strength were about the same as her, and she couldn't stretch out her arms to restrain the other party like Atletico with long arms, and a few itchy flesh on her body were quickly attacked, so she had to fight back while laughing to maintain her psychological balance.

It wasn't until there was a knock on the door that the two women came to their senses from the fight, and each sorted out their disheveled clothes and hair.

When they came in, Atletico's eyes lingered on the cheeks of the two of them for more than a second. Although the sound insulation of the door is good, it is not professional after all, and he still heard some clues just now.

No way, someone's dog ears don't bark for nothing.

However, he didn't continue to make fun of them, but handed the plastic bow he was holding to Zhang Xuyao and said, "The latest "Condor Shooter 2", try it." ”

took it and pulled it casually, Zhang Xuyao found that the bowstring with the thickness of the head rope was actually easy to pull, and after a closer look, he found that the two ends of the bowstring were not fixed, and could be pulled out like a tape measure.

"That's it, if I really get you a professional bow, can you pull it open?" said Atletico and handed the customized N7 on his body to the other party.

The N7's audio system has been revamped with a new head DSP module, and the original multi-channel full-cover headphones have been removed and replaced with a special in-ear one to test the effects of the holographic sound system.

Head recording can record all the information of the entire sound field with two-point pickup, so its recording products are vividly called holographic sound, or 3D holographic sound.

There is actually an exaggeration in this, and the bees have not used this term before, but it is generally called virtual surround sound.

But now that bees are starting to focus on marketing, the names have become taller, like the incomprehensible austenitic 304 stainless steel.

Of course, there are also factors in this to increase Atletico's confidence, with the blessing of personalized ear function, although it cannot be compared with the 128-channel, 64-speaker Dolby Atmos, but it is no problem to compare with the general multi-channel surround sound.

In fact, the technology applied here is actually a 3D digital sound field that draws on the concept of human head recording, and its biggest feature is that it has more head tracking function, which can make the sound of each audio track change slightly according to the change of head angle, so as to better match human listening habits and produce the best virtual listening effect.

"So, it's still only suitable for playing games and not for listening to music?" Zhang Xuyao naughtily shook the N7 in her hand, and swayed left and right with her movements as the earbuds hung down on both sides.

"Well, there are too many sound details in music, film and television, and the amount of system computing is still not enough, so only fixed surround effects can be realized, and only game sound effects can achieve dynamic surrounding," Ma Jing said with regret.

After Bee updated the PT game engine and added the head function simulation function, many mobile games emphasizing sound field gameplay were soon born. Although FPS games have surround sound, it is very difficult to port them to mobile phones, and since Bee has done the most complicated work, everyone must take advantage of it.

For example, the predecessor of "Condor Shooter 2" that he is now giving to Zhang Xuyao is one of the more brilliant surround sound mobile games at the beginning, and now this is a new version of VR launched after Bee Games obtained authorization.

In fact, in addition to the core gameplay model of listening to the sound and shooting the flying target, there is not much similarity between the two games, the first generation is also a mobile game that listens to the sound point screen, but the second generation has become a VR somatosensory game like "Become Ke Zhenevil", the player's body movement and head swing will affect the direction of hearing the sound, and you can also see the synchronized change of the picture through the GuòVR headset, which is more realistic and immersive.

It is said that the planners who couldn't stop their brains expanded the list of monsters several times according to the principle of "flying in the sky, shooting at once", from the first earth creatures such as birds, jumping fish, insects, and fantasy creatures such as griffons, angels, dragons, etc., to cannonballs, missiles, airplanes, and even Gundam Superman Iron Man.

Of course, the anime characters in the back are just rumors, and even if they do appear, they won't be real people, and they will only fly around with all kinds of copycat target machines, after all, the bee game has not yet reached the point where these popular characters are lightly used to play soy sauce as sandbags.

However, at present, Zhang Xuyao has not yet reached Cheng Dù who shoots Gundam, and she has not even seen the flying fish, and what appears in front of her is just flocks of gray geese.

Zhang Xuyao held the bow arm in his left hand and stretched forward, his legs were stretched out to make a steady lunge, his right hand was full of bowstrings ready to be released at any time, his attention was focused on the screen in front of him, his little head shook slightly to search for the target, and when the target appeared in front of him, he immediately let go of the string, and the sharp sound of arrows breaking through the air and the sound of the bowstring rebounding immediately sounded in his ears.

However, the scream of the arrow in the prey she expected was not heard, and the arrow was a full five wingspans away from the target, and not a single bird feather was touched.

"Alas! I won't play, I won't play!" she took off her headset, turned to a certain competition who was watching leisurely on the sofa next to her, and shouted: "This is too difficult, isn't it?

Atletico pouted and said disdainfully: "That's you too vegetable, this game is about auditory prediction, you have to wait until the target flies in front of you to aim, you are not an archery champion, of course you can't shoot." ”

"I'll show you this," Tang Jiayi walked over and took the headset and model bow, and re-entered the game.

She didn't put up any lunge stands, and the bowstring was only slightly pulled apart, and all her attention was on her ears. On the monitor on the side, a gray goose just appeared, and it was hit by an arrow in the abdomen, "That's it, you have to predict." ”