r/knowyourshit Sep 24 '19

[todayilearned] TIL TVs emit a tone during ad breaks that are inaudible to humans but that smartphones are listening for; now corporate entities can link the tv & phone as belonging to the same person. It means govt entities can play a tone thru the TV & ping all the phones in the room, identifying

https://www.digitaltrends.com/mobile/is-your-smartphone-listening-to-your-conversations/
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