LISNR is an ultrasonic inaudible technology; a communication protocol that sends data over audio. We use ultrasonic audio called Smart Tones™ to transmit information.
LISNR transmits customizable packets of data every second that enable proximity data transmission, second-screen functionality, authentication and device to device connectivity on any LISNR-enabled device.
Audio Frequency Range: ~ 18.7 – 19.2 kHz
Data Transmission: customizable based on use
Detection Time: customizable based on use ~ .6 sec – 3 sec
Software: C Library base with restful API depending on use