What Is Radio?
When people ask What Is Radio?, they usually mean one of two things: the receiver that turns broadcast signals into sound, or the stations themselves, such as a national public broadcaster or a local news channel. The name goes back to the Latin radius, meaning a ray or beam, which describes how signals spread out from a transmitter.
Programmes reach listeners in two main ways. Over-the-air transmission uses electromagnetic waves picked up by an antenna, while cable and broadband carry the signal as high-frequency electrical pulses, much like terrestrial and cable television. In both cases the receiver converts the signal into the news, music and talk we hear.
Since its arrival in the early twentieth century, radio has been one of the most powerful ways to reach a mass audience, and it has adapted well to the digital era. Most traditional stations now stream online so they can be heard anywhere, and thousands of internet-only channels focus on a single genre or theme.
Today radio is less about simply delivering information and more about the experience: discovering new artists, following shows you love and finding a sound that matches your mood.