data-over-audio

Transmit data using ultrasonic audio. Perfect for offline/network-free data transfer, automatic content recognition (ACR), and broadcast.

Tool to prevent eavesdropping and ultrasonic access of your smart phone.

SoniControl - the first ultrasonic firewall

Allows your device to communicate in an electronic sound language. Follow us on twitter: https://twitter.com/qrtone. Demo App in https://universite-gustave-eiffel.github.io/qrtone/

Protocol for exchanging small amounts of data over audio.

C Libraries to encode and decode data over sound

Data transmission over audio

iPhone SDK to decode ultrasonics

Implementing chirp.io SDK in Android