I had this thought just now at the gym. I noticed multiple people, myself included, using wireless earbuds during our workouts – specifically AirPods.
My question is, if multiple people are using AirPods that work on the same frequency/signal, how come our music doesn’t all interfere with each other? How do each of our phones/AirPods differentiate from the others a few feet away from me?
In: Engineering
It’s similar to how 1000s of cars can drive on the same highway at the same time.
Think of the highway as the total frequency bandwidth alloted to Bluetooth.
Think of the cars as your Bluetooth items
Think of the lanes as frequencies.
Cars, like your Bluetooth, only occupy so much space. I think BT range i’s intentionally limited to like 5 meters or something like that.
So even though you’re driving in the same lane as 100 other cars. So long as your car doesn’t occupy the same space at the same time as another car, you’re good to go.
Additionally, just like how some cars swap between lanes repeatedly, your Bluetooth does that too. They don’t stay on one frequency but randomly hop between them in intervals.
(You will get some overlap once in a blue moon, but it’s done so rapidly that a little bit of error here and there doesn’t really impact your experience)
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