Chapter 903
As a matter of fact, it has been used for a long time by the divine religion. According to the principle of the anechoic instrument given by love since childhood, this thing actually relies on sound to eliminate sound.
In the audience's attention, Li Yun said: "I think you have learned the principle of this machine in junior high school physics.
We know that the reason why people can hear sound is that the vibration of the sound source causes the molecules in the surrounding medium to vibrate and form sound waves. Sound wave propagates in the form of longitudinal wave in the air. It has the characteristics of wave, has interference phenomenon, and obeys the superposition principle of wave.
A train of sound waves consists of waves and troughs separated from each other. When encountering another train of waves, if it is * * and * * superposition, the wave trough and wave trough superposition, the amplitude will increase; if it is * * and wave trough superposition, the amplitude will cancel each other.
When applied to sound waves, the amplitude change caused by interference is directly reflected in the sound size. That is to say, if we can create "anti sound waves" with the same waveform as the sound waves of noise, and then let them be superimposed in a way of mutual cancellation, then we can make the noise disappear. "
Everyone nodded to show understanding, which is really the content of junior high school.
Li Yun continued: "at present, active noise reduction headphones on the market also use this noise reduction method of" fighting poison with poison ".
But there is a problem with noise reduction earphones. I believe people who wear earphones for a long time know it. "
Everyone laughs knowingly. No matter how good the ear is, wearing it for a long time will make people feel stuffy and hot. It makes people's ears very uncomfortable and even makes them vomit.
"The difficulty of active noise reduction technology is that the time control of sound wave is very precise. If the time difference is not calculated well, it is likely that the noise will be strengthened instead of being suppressed, which will be self defeating. At the same time, the barrier of noise reduction algorithm is also very high. If you want to do a good job in active noise reduction, you must rely on your own acoustic knowledge from the main modeling and simulation, and finally find the most appropriate filter design and parameters based on headphone noise reduction through different attempts. "
Li Yun continued to explain: "but this muffler is different. It has an intelligent system, which can monitor the external sound waves in real time, and can react quickly to generate appropriate anti sound waves..."
Everyone was confused by Li Yunzhao's explanation of the principles of this xuanke, and finally understood only one thing. The principle of this thing is to launch anti sound waves under the control of an intelligent system.
In other words, the only bad thing about the muffler is that when it is turned on, the human body will actually be placed in the noise, but the noise is not audible to human beings.
People who are looking forward to this magic thing are relieved to hear that it is just such a bad thing.
In fact, the human body is in the range of sound all the time. As long as it is not too loud, or people are too sensitive to these sounds, there will be no problem.
Lu Ming understood. He thought of Xiao AI, a strong artificial intelligence living body he saw last night. He already understood that the internal intelligent system of this muffler was probably made by Xiao AI.
After answering everyone's questions, Li Yun was relieved and said: "the first batch of silencers will be available for interview soon. If there is no accident, they will be available for sale in three days. According to the invitation letter of this press conference, you can get a small silencer for free in the future. We will talk about the details later."
Everyone was relieved. The conference ended smoothly. If it didn't, everyone's heart would be scared. This black technology can really shock the ears of deaf people.
"In addition, a month later, Yuyue group's Taisheng technology will release a new product."
Everyone was shocked. Why do you want to come?
Li Yun said with a smile: "the name of the press conference can be called: bright future, the beginning of a new era. Of course, it can also be called "blinding your eyes!"
In the audience's attention, Li Yun said: "I think you have learned the principle of this machine in junior high school physics.
We know that the reason why people can hear sound is that the vibration of the sound source causes the molecules in the surrounding medium to vibrate and form sound waves. Sound wave propagates in the form of longitudinal wave in the air. It has the characteristics of wave, has interference phenomenon, and obeys the superposition principle of wave.
A train of sound waves consists of waves and troughs separated from each other. When encountering another train of waves, if it is * * and * * superposition, the wave trough and wave trough superposition, the amplitude will increase; if it is * * and wave trough superposition, the amplitude will cancel each other.
When applied to sound waves, the amplitude change caused by interference is directly reflected in the sound size. That is to say, if we can create "anti sound waves" with the same waveform as the sound waves of noise, and then let them be superimposed in a way of mutual cancellation, then we can make the noise disappear. "
Everyone nodded to show understanding, which is really the content of junior high school.
Li Yun continued: "at present, active noise reduction headphones on the market also use this noise reduction method of" fighting poison with poison ".
But there is a problem with noise reduction earphones. I believe people who wear earphones for a long time know it. "
Everyone laughs knowingly. No matter how good the ear is, wearing it for a long time will make people feel stuffy and hot. It makes people's ears very uncomfortable and even makes them vomit.
"The difficulty of active noise reduction technology is that the time control of sound wave is very precise. If the time difference is not calculated well, it is likely that the noise will be strengthened instead of being suppressed, which will be self defeating. At the same time, the barrier of noise reduction algorithm is also very high. If you want to do a good job in active noise reduction, you must rely on your own acoustic knowledge from the main modeling and simulation, and finally find the most appropriate filter design and parameters based on headphone noise reduction through different attempts. "
Li Yun continued to explain: "but this muffler is different. It has an intelligent system, which can monitor the external sound waves in real time, and can react quickly to generate appropriate anti sound waves..."
Everyone was confused by Li Yunzhao's explanation of the principles of this xuanke, and finally understood only one thing. The principle of this thing is to launch anti sound waves under the control of an intelligent system.
In other words, the only bad thing about the muffler is that when it is turned on, the human body will actually be placed in the noise, but the noise is not audible to human beings.
People who are looking forward to this magic thing are relieved to hear that it is just such a bad thing.
In fact, the human body is in the range of sound all the time. As long as it is not too loud, or people are too sensitive to these sounds, there will be no problem.
Lu Ming understood. He thought of Xiao AI, a strong artificial intelligence living body he saw last night. He already understood that the internal intelligent system of this muffler was probably made by Xiao AI.
After answering everyone's questions, Li Yun was relieved and said: "the first batch of silencers will be available for interview soon. If there is no accident, they will be available for sale in three days. According to the invitation letter of this press conference, you can get a small silencer for free in the future. We will talk about the details later."
Everyone was relieved. The conference ended smoothly. If it didn't, everyone's heart would be scared. This black technology can really shock the ears of deaf people.
"In addition, a month later, Yuyue group's Taisheng technology will release a new product."
Everyone was shocked. Why do you want to come?
Li Yun said with a smile: "the name of the press conference can be called: bright future, the beginning of a new era. Of course, it can also be called "blinding your eyes!"
RECENTLY UPDATES
Fantasy
Action
Eastern
Contemporary Romance
Action
Action
Contemporary Romance
Action