I know that it’s electrowaves but how does it become sound again ? How are there several channels ?
In: Technology
If you’ve ever tuned a guitar, I can explain channels easily. When you get two strings tuned to the exact same frequency, playing one string will make the other vibrate. Radios have tuneable electronic vibrators, and tuning in a station means tuning the vibrator until it matches the station exactly. The vibrator will resonate strongly with the carrier frequency from the station, but barely move at all from the cacophony of other channels coming in through the same antenna. The strong vibrations are then amplified, filtered, and transformed back into sound. The radio spectrum has an enormous frequency span, so you can fit many more channels inside it than you could tones on a guitar.
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