Cincinnati, Ohio, startup LISNR lets businesses harness the power of inaudible sound to send messages to customers’ microphone-equipped mobile devices. LISNR tones can be transmitted through existing speaker systems, making the technology more efficient and accurate than Bluetooth-based competitors. LISNR has a wide range of clients, from television networks to retail stores, and recently ranked twelfth on the 2015 CNBC Disruptor 50 list. In September 2013, LISNR received a $250,000 investment from CincyTech, a regional partner of Ohio Third Frontier in southwest Ohio. This funding allowed the company to service clients in cities outside of Cincinnati and expand to new markets without having to move their headquarters.