Ticketmaster will soon admit you to events using audio data transmitted from your phone — VentureBeat — “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.”