Like it picks up a signal and processes it and from that I can hear music. But is it just the variation in frequency? And if so, then how do stations work?
In: Technology
Imagine the music you listen to is a dish (music waveform). The radio station takes the dish and puts a very distinctive spice (carrier signal) in it and mixes it up according to a certain recipe (modulation). It then sends the spiced food (modulated waveform) out via delivery (broadcast).
Your receiver at home takes the food from the delivery guy and has a nose (demodulator) that can sense which spice is contained in the dish and uses an anti-spice (demodulation) to rid the food of the spice flavour so you can only taste the original dish. By telling your receiver which spice to smell for (setting the frequency), you can tune into different radio stations that use distinctive spices.
Sometimes, different restaurants (radio stations) use the same spices, which can confuse your receiver and make you hear two stations on the same frequency. In that case, the receiver is trained to pick the food that has a stronger aroma (signal strength) and stay on it.
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