Radio

Definition

Radio is a technology that allows for the transmission of sound through airwaves. It has been used for entertainment, news broadcasting and emergency communication since its invention in late 19th century.

Related terms

Broadcasting: The distribution of audio and/or video signals which transmit programs to an audience.

Frequency Modulation (FM): A method used in radio broadcasting technologies where information (sound) is added to carrier wave by varying its frequency.

Amplitude Modulation (AM): Another method used in radio broadcasting technologies where information (sound) is added to carrier wave by varying its amplitude.