Ticketmaster will soon admit you to events using audio data transmitted from your phone

Ticketmaster will soon be able to admit you to live events and track your movement using nothing more than a discrete digital audio broadcast from your smartphone.
The ticketing giant has teamed up with Lisnr, a data-over-audio company that uses an ultrasonic sound technology it calls “smart tones” to transmit information between devices.
There are myriad use-cases for Lisnr’s  technology — for example, it recently partnered with Jaguar Land Rover to enable