How do radio stations know that you’re listening to them? Is there a signal sent back somehow?
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Late response … agree 100% with earlier comments: no, your radio doesn’t send a signal back, though if you’re streaming online it’s of course being tracked.
Beyond those points … I’ve always imagine it’s part of the reason radio stations have “20th caller wins a pair of tickets!” contests. Certainly there’s data being collected there that can inform an audience size estimate.
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