An obvious marketable application for this is location tracking. Advertisers could embed more detailed positional information into audio / video advertising and

An obvious marketable application for this is location tracking. Advertisers could embed more detailed positional information into audio / video advertising and use apps to get more granular information on who’s listening to it. A logical extension of https://www.google.co.uk/amp/s/www.independent.co.uk/life-style/gadgets-and-tech/news/android-apps-beacons-tracking-users-inaudible-sound-hidden-adverts-ultrasonic-audio-privacy-phones-a7723871.html%3famp https://www.google.co.uk/amp/s/www.independent.co.uk/life-st...