Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 282 Voiceprint Identification Analysis Results
The case is a previous case, so naturally there is no need to worry.

The high-speed rail new area also heard that Lu Chuan can do voiceprint analysis, so I sent it to try.

Yutuyi arrived earlier than scheduled, and was sent to the criminal investigation team on Wednesday afternoon.

Qin Yong arranged to purchase a domestic language map instrument, which used to be made abroad, and the country only started researching and manufacturing it more than [-] years ago.

Even after domestic production, the price of this thing is not low.

Among the dozens of equipment in the current survey laboratory, it can be regarded as the most valuable.

There are not many people in the current survey, but in terms of the total assets of the entire criminal investigation detachment, the current survey office can be called the number one.

There are nearly forty sets of equipment, large and small.

Although Lu Chuan has accepted the intermediate voiceprint identification and analysis skills rewarded by the system, he has a way to use the language graph instrument in the skill experience.

But in reality, today is also the first time Lu Chuan has seen Yu Tuyi in real life.

"Just such a thing... 30?"

Lao Bai watched in amazement as the factory staff assembled and debugged the instrument.

The thing is not big, three small rectangular boxes, connected together by various wiring harnesses.

Two of them are all buttons, and it looks like there are dozens of them.

This thing is not particularly easy to operate at first glance. With so many buttons, it is probably impossible to figure it out without a period of study.

The other one has a screen window in the lower left corner, and you can tell it's black and white just by looking at the color.

"Just here to see the result?"

Lu Chuan nodded: "This is the most advanced language map instrument currently on the market. It can directly record and analyze the target voice, and can also import audio for analysis."

Ordinary language graph instruments record sound through a dedicated microphone, and then continue to analyze it in real time.

This language map instrument is different. It can directly import audio data into the system, which avoids the sound pollution of secondary recording and improves the analysis accuracy a lot.

"When did you learn to use this?"

Lu Chuan rubbed his head: "I have come into contact with it when I was in college, and we have this kind of language graph instrument in our laboratory."

It's college again.

Lu Chuan's university was really worthless.

Yang Sen suddenly fantasized that if his son could learn half of Lu Chuan in college, no, as long as one-third of his skills, he would not be bad when he came out to join the society.

The commissioning of the equipment was completed quickly, mainly to test whether the equipment is in good condition.

The staff themselves do not know how to analyze the voiceprint, but only the process set by the manufacturer, the wiring harness is connected, the test is performed with different voices, and the analysis results are compared with the standard pictures.

After several processes, it was confirmed that the machine was fine, and Liu Guodong signed the acceptance form, and it was considered complete.

The procurement of items by the criminal investigation detachment does not mean that you can buy whoever you want, but they are all collected on the Internet.

It's just that the purchaser put in the things that didn't exist according to the needs of the criminal investigation detachment.

Of course, there is no discount at this price, it is definitely the manufacturer's retail price without any discount.

"Master, you go up to the rest meeting first, and I will go there after analyzing that recording."

"No, no, we'll just watch it here. We haven't seen the voiceprint identification and analysis yet, so we'll learn how to do it."

Liu Guodong waved his hand. Now that he is familiar with it, he doesn't have to hide it anymore.

Lu Chuan didn't care either, it's not easy to learn.

The identification and analysis of the voiceprint does not mean that at the input end of the machine, the result will appear at the other end after the sound is recorded.

Of course, it is also possible to do it like this, but if you do it like this, basically everyone's voice will get the same spectrum analysis.

Unable to reflect specificity, this thing is a relatively expensive toy.

Lu Chuan needs to debug the equipment to extract the different frequencies of the sound, and then conduct a comparative analysis.

The voices of men and women sound different, but it is mainly determined by the frequency and fullness of the voice.

Generally speaking, female voices have a higher frequency and male voices have a lower frequency.

The fullness of the female voice in the high frequency band is stronger, and it sounds crisp.

Male voices have a stronger fullness at low frequencies, so they sound muffled.

The analysis of the voices of the four people is not very fast. Lu Chuan needs to repeatedly record the original voice, and then adjust the equipment to analyze different frequencies.

In the eyes of Liu Guodong and others, Lu Chuan just kept turning the button, and then took pictures of the analyzed map.

In fact, this instrument can print out sound maps, but Lu Chuan did not do so.

Printing the atlas is just for comparison. Lu Chuan took a picture with his mobile phone, and the comparison is also very convenient.

After tossing back and forth for about an hour, Lu Chuan turned off the language graph instrument.

"nailed it?"

"It's almost there, and the report will be released later."

The language map instrument only analyzes the sound spectrum, and is not intelligent enough to report the sound analysis results.

Successful voiceprint identification analysis results often provide more information than expected.

For example, age range, weight range, place of residence, eating habits, etc., can be obtained through voiceprint analysis.

The voiceprint analysis just done in the underground laboratory is just a basic data analysis, which is the data basis for drawing conclusions.

What Lu Chuan is doing now is the essence of the entire voiceprint analysis.

Lu Chuan numbered the sounds that appeared in the recording according to the time of appearance.

"No. 35 female voice, Putonghua second-level B, Dingzhou accent, aged between 45 and [-], weighing about [-] kilograms."

"Male No. 40, Putonghua Level 45A, Southern Zhejiang accent, aged between [-] and [-], weighing about [-] kilograms, has the habit of eating spicy food all year round."

"No. 35 male voice, Putonghua second-level A, Haizhou accent, aged between 40 and [-], weighing about [-] kilograms."

"Girl No. 20, Putonghua Level 25 B, Haizhou accent, aged between [-] and [-], weighing about [-] kilograms, with a lacerated vocal cord, and underwent repair surgery about five years ago."

Liu Guodong held the voiceprint identification and analysis report issued by Lu Chuan with a confused face.

what's the situation?
Just by listening to the voice, you can know the age of the other party?
Okay, let’s not talk about the accent. Without professional analysis, Liu Guodong himself can tell the difference between the Haizhou accent and the accents of other places.

Regardless of age, people of different age groups do have different voice thickness and timbre.

But what about weight?
How to analyze the weight through the sound?

Nonsense?
Not to mention eating chili, can this be heard?
The last one is even more outrageous. Liu Guodong has heard this recording many times.

The last female voice was very hoarse and sounded like the voice of a middle-aged woman in her 50s.

How could it be a young woman in her 20s?

Lao Bai and Yang Sen also came over and saw the conclusion of the analysis report made by Lu Chuan.

"Xiao Lu, is it true or not?"

(End of this chapter)