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Til am radio is still a thing? I know lots of fm radio stations but always wondered why every radio has an am setting, while there is no am stations available.
In some places you'll see those giant electric warning signs over interstates.
And some times they'll say "tune to AM 84.2" or whatever, because what drivers need to know can't be read off a sign.
Ah, good, I assumed it was just for Church Broadcasts or something, but the whole safety requirement makes much more sense. Sucks for the hearing impared, though.
The popularity of AM has declined greatly, so license purchase for religious and crazy alt-right broadcasting can be had on the cheap.
AM radio is also used for time keeping and weather transmissions for embedded systems that don't need Internet or heavy computing power (like a clock on your desk or a watch). It's also good for emergencies. All of which can be passed in analog audio or digitally modulated (or both). Probably not exciting for music, but the fact that it's there and you can tune into it to find out the weather or traffic is useful.
i thought all cars already have am
I don't think I've ever heard an AM transmission in my life, is there a benefit relative to FM or digital radio?
The AM band is the strongest of the two. Some countries however have made AM illegal to use in consumer vehicles, because it is used by military and state.