Notes From the Fieldby Martin Weil

November 16, 2015

Your latest privacy concern – ultrasound

Apparently, TV and computer ads can emit inaudible sounds that find and link you at home to your cell phone or other device.  Advertisers then are able to track you more completely across the spectrum of both online and offline activity.  Creepy article here. You have been warned.  Link from Tyler Cowen.

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