What is the principle of telephone conversation?

The telephone is a communication tool that emerged with the introduction of the telegraph. The earliest telephone was invented in 1876 by Bell, an American inventor, and it was only after Edison's invention of the magnetic transmitter in 1878 that the telephone became easier to use. The basic principle of the telephone is the use of electromagnets to convert sound into electrical current, which in turn is converted into sound. When you dial the telephone number plate, it will produce a different pulse rate of the pulse signal through the telephone line to the switchboard, through the switchboard to connect to the recipient user phone, connected to talk.

The telephone receiver consists of two parts, a sender and a receiver, the sender sends out the sound, the receiver receives the sound. There is a thin diaphragm in the sender, he can speak into the voice of the pulse, through the wire to the other side of the receiver, the receiver has a film, from the other side of the electrical impulse will make the film vibration, this vibration produces sound waves and the other side of the sound of the human voice is almost the same, so that completed the process of communication.

The telephone has been invented since more than 120 years of history, the function and performance of the telephone has been increasingly perfect, it has a profound impact on the life of modern people.