LISNR

LISNR is a high frequency, inaudible smart tone technology, a new communication protocol that sends data over audio.

LISNR is a high frequency, inaudible technology; a communication protocol that sends data over audio. They use inaudible sound waves called Smart Tones to transmit information. LISNR transmits customizable packets of data every second that enable proximity data transmission, second-screen functionality, authentication and low-fi device to device connectivity on any LISNR-enabled device.