LISNR at R GA Demo Day 2015

Lisnr uses high-frequency audio tones to unlock discounts, second-screen experiences, and other engagement opportunities through ambient noise. The idea here is that Lisnr can provide audio tones, ones outside of the range of regular hearing, that will trigger any device into a certain action. If you’re walking through a baseball game and head up to a concession stand, that stand can send you a menu of items or even let you order online. If you head toward the exit of the stadium, the Uber app can be triggered to open up and ask if you need a ride. (http://techcrunch.com)