Ye Tao naturally knew that even if this pile of things is implemented from now on, it must be practical, and it will not be thought about in a few years. This time it was taken out just to allow the Intelligence Bureau to start cultivating a group of talents and give them preliminary internship opportunities. The most important thing this time will be the recording technology that has just been released.

The recording technology has been developed in the Yeshi Workshop Research Institute for several generations. Now, it has finally achieved good performance in terms of reliability, ease of use, etc. The earliest recording technology was the dense wax cylinder. Although the Yeshi Workshop's level in precision parts has reached a considerable level, it cannot solve the defects of the material itself after all. The sound receiving end of the dense wax cylinder recorder uses a paper basin, which does not involve the circuit at all. Instead, relying on an extremely slender probe, the sound vibration sensed by the paper basin is transmitted to a control box, and the

The dynamic amplification of the dots depicts this dynamic on the dense-shaped wax cylinder rotating at a constant speed. Although this thing can almost be called the show of precision mechanical processing technology, it is terrible in terms of recording effects. The recorded sound is blurred and disturbed by noise, or the sound is strong and fluctuating, and it will not work properly, leaving a string of screaming sounds on the wax cylinder. In addition, the life of the dense-shaped wax cylinder is very short, and it will not work after a few replays, which greatly reduces the practicality of this technology.

The second generation of recording technology is much better. The institutes of the Institute's Electrical Workshop discovered the sound excitation effect and developed the first generation of mixed ore sand sound probes, which was very good. The collected sound was amplified and then firmly portrayed on the bakery master disk. However, this second generation of recording technology has a big problem, that is, the sound signal is amplified in the mechanical section, and the distortion is very strong. But after all, through this second generation of technology, the workshop has already had basic ideas, the material of the master disk, the sound probe technology, and even developed the technology of copying with the master disk. Although the copied disk is always a little different from the master disk when it is played back, the quality has become more and more stable and reliable.

At this time, Ye Tao decisively intervened in the research. Ye Tao had nothing to change for the sound probe. This sound probe may be a little larger in size. The most exquisite trial product is as big as a microphone, but it is completely available, and the accuracy is also surprising. Ye Tao understood that the bottleneck of the recording equipment this time is that the researchers do not have the knowledge and experience of circuit design. Ye Tao directly guided the basic transistor manufacturing, developed the first and second generation transistors, and began to popularize the knowledge of circuit design. The third generation of recording equipment was born. Although there were slight improvements in sound acquisition and master engraving technology, in general, the third generation of recorders and the second generation were developed in history, but in the middle, there were earth-shaking changes.

After the sound is collected and becomes an electrical signal, it is transmitted to the master engraving mechanism after two layers of filtering and three-pole amplification. Although such a recorder is a little larger and needs to accommodate many transistors, the design idea is already very mature. The recorded sound is only slightly distorted, but it can already distinguish the speaker of the voice, and the recording of animal calls can also distinguish the specific types, which has great practical value. After the design idea is mature, the research institutes in the workshop were stunned and quickly made various improvements. As the transistor production process matured, the volume reduction cost decreased, and as the research institutes absorbed the recording device and strengthened it.
Chapter completed!