Transmission refers to the process of taking the sound you generate in the studio, turning it into radio waves, and sending it out into the air. On the other end, your listeners will use receivers to capture the radio waves and turn them back into sound. Transmission can be hard to understand because we can’t see or hear the electromagnetic waves. It’s also hard to predict how transmission will work – your signal will be affected by things like mountains, trees, buildings, rain, and the presence of other radio waves. No station knows exactly where their signal will go before they turn on their transmitter. However, with a basic understanding of the physics behind radio frequency transmission, you can make some fairly good predictions.