The history of tape recorders dates back to the late 19th century. In 1888, O Smith published the ** using remanence for recording, which laid the theoretical foundation for the tape recorder. After that, the development of the tape recorder went through a process from analog to digital. The earliest recording equipment was the tape recorder invented by the Danish engineer Valdemarpoulsen, who used the principle of magnetic recording to convert sound signals into magnetic signals and record them in tape, which made tape recorders widely used in the 1930s.
In 1949, Magnecord introduced the two-track stereo recorder, bringing the tape recorder into the stereo era. In 1963, Ehlmuntz further refined the design of the EASH to form a cassette tape. However, by the late 1970s, cassette recorders had been gradually replaced by cassette recorders because they were more convenient and easy to use.
In the process of development, the technology of the tape recorder is also constantly upgrading. In the 1980s, digital voice recorders began to emerge and gained widespread adoption in the 1990s. At the same time, with more and more functions of audio recorders, such as sound effect enhancement, stereo recording, multi-channel**, etc., the market for audio recorders is also expanding.
At present, there are three main categories of popular tape recorders on the market: disc recorders, cassette (cartridge) recorders, and cassette recorders. These recorders can record not only audio, but also images, ** and many other information. In addition, audio recorders are also widely used in teaching, backing up audio and other fields.
Overall, the development of tape recorders has witnessed the advancement of technology and people's pursuit of sound quality, convenience and versatility. With the development of digital technology and education, although the use of audio recorders is gradually decreasing, its role in some specific scenarios is still important, such as teaching, backing up audio, etc.