World’s Most Advanced Ultrasonic Audio Technology

Send Data Over Audio

LISNR is an ultrasonic audio technology — a communication protocol that uses inaudible sound, called Smart Tones™, to transmit information.

With any LISNR-enabled software or device: Use LISNR to transmit customizable streams of data every second — enabling proximity engagement with audience measurement, seamless & secure methods of authentication, and device to device data transmission for automation and connectivity.

  • Audio Frequency Range: ~ 18.7 – 19.5 kHz
  • Data Transmission: customizable based on use
  • Detection Time: customizable based on use
  • Software: C Library base with restful API depending on use


Interested? Request access

Enterprise Commercial Grade Features


  • Best-in-Class Data Transmission/Throughput
  • Local Tone Generation via any device
  • Audio Mesh Networking single/bi-directional use


  • Detection time: adjustable based on use
  • Ability to apply 256 bit encryption
  • Offline capability (no data connectivity needed)
  • Tokenization (meta data keys based on use)


  • Battery/CPU Efficiency
  • No hardware requirement
  • Local app/DSP level coding


  • Any device platform functionality (SDK & API)
  • Full customer support team (live & virtual)
  • Cross-device best in class reliability
  • Commercially deployed globally