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	by skyboy101 1753 days ago
	If I'm not mistaken, smart TVs can still communicate by via inaudible sound signals directly to other devices. Spooky.

1 comments

Really? That's dystopian, but in a cool way. A little like Amazons own internet sharing network or what it was.

It's terrible though. We really live in a panopticon now.

Any links?

Not exactly the TV manufacturer doing it, but there have been reports of advertisers using ultrasonic pitches to do cross-device tracking.

Be careful which apps you allow to use your phone's microphone.

Slightly different than what gp was talking about but also deals with using invisible audio for DRM

Audio is usually invisible