Introduction We present a simple to use implementation of networking across ultrasonic frequencies, by making use of Gnuradio and a microphone and speakers. This allows you to use TCP/IP,UDP across an audio link. In order to follow this tutorial we recommend you use the LiveDVD release of Gnuradio (which is basically a Ubuntu distribution, with gnuradio already installed). This is easily downloada
![Ultrasound Networking](https://cdn-ak-scissors.b.st-hatena.com/image/square/fb890f8f7468337974478c81390edca061c3ee88/height=288;version=1;width=512/https%3A%2F%2Fwww.anfractuosity.com%2Fwp-content%2Fuploads%2F2014%2F02%2Fclip-e1518398510747.png)