They play a vital role in communication technology as they are heavily relied on to transfer data and information across the world.
[1] More broadly, the definition of a radio station includes the aforementioned equipment and a building in which it is installed.
A microphone is used to capture the input of sound waves created by people speaking into the device.
The waves travel at the speed of light, taking the radio program (voices recorded) with them.
[4] A compound of both a transmitter and a receiver is called a transceiver, they are combined and share common circuitry or a single housing.