“Netherlands-based interactive producer Richard Vijgen calls the iPad app Architecture of Radio and, in addition to detecting Wi-Fi, he claims that it also picks up signals from cell towers and observation satellites.
The app hasn’t been released yet, but a video demonstration offers a brief peek at how it works. In the video, a person uses the app to pick up a wide array of Wi-Fi and communications signals that are represented by circular waveforms cascading across the screen like ocean waves, accented by radio static sounds indicating new signals.” -Adario Strange
