radio and television

Radio and television are news dissemination tools that transmit sound, images, and videos through radio waves or wires. Based on wireless telegraphy, they have achieved large-scale real-time one-way communication, greatly enriching the cultural life of the public and promoting the rapid circulation and sharing of social information.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Radio and television are news dissemination tools that transmit sound, images, and videos through radio waves or wires. Only broadcasting sound is called sound broadcasting; Broadcasting images and sounds is called television broadcasting. The popularity of Marconi's wireless telegraph also stimulated the birth of wireless broadcasting. On December 24, 1906, Professor Fessenden of the University of Pittsburgh in the United States successfully conducted humanity's first wireless broadcast to the public through a radio tower in Blunt Rock, Massachusetts. The Marconi Research Centre, located in Chelmsford, England, launched the world's first regularly broadcasted radio entertainment program in 1922.