Who invented the telephone?

The invention of telephone was invented by alexander bell after a long period of painstaking research from 1873. The phone number is alexander bell. At work, he saw that electromagnets were used in telegrams to convert electrical signals and mechanical movements. Inspired, he made a practical telephone device through repeated experiments.

Before Bell, many people had been studying this problem. 1875, Bell was inspired by the application of electromagnets in telegraphy, which can convert electrical signals and mechanical movements.

1876, Bell obtained the telephone patent in the United States. He not only invented the telephone, but also established the first telephone company in the world.

But later, some people questioned that the telephone was not invented by Bell, which has been controversial.

Extended data:

As early as the eighteenth century, the word "telephone" was used in Europe to refer to microphones strung together with wires (cups strung together with wires) The telephone was attributed to Alexander Graham Bell. The principle of early telephone is that sound is a compound vibration in the air, which can be transmitted to solids and to conductive metals through electric pulses. ? Bell applied for the telephone patent in March 1876.

On June 5th, 2002, the United States Congress confirmed Antonio Muzzi as the inventor of the telephone. Zi Mu first showed his invention to the public on 1860, and published an introduction in an Italian newspaper in new york.

The improvements and inventions of telephone in history include: toner microphone, manual switchboard, dial, automatic telephone exchange, program-controlled telephone exchange, dual-tone multi-frequency dialing, voice digital sampling and so on. In recent years, new technologies include ISDN, DSL, VoIP, analog mobile phone and digital mobile phone.

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