AudioLocationFinder 1.1

Have you lost your friends in a crowd? Or do you want to estimate the length of an area outside?

Audio Location Finder displays the positions of you and your friends on a virtual map up to a precision of 50 cm. No GPS or Hotspot localization is needed! Only by the sounds around the distances and positions of the connected iOS devices are calculated by this app.

Usage instructions: Connect two or more iOS devices in the same WiFi network. Start the app on all devices. Clap some times at a small distance from the connected iOS devices. The distances and positions of all devices are displayed in the "Localization" view.
The "TDOA" view shows a list of connected iOS devices and the distances to them.
"Recorder" lists detected audio events.

Technical background: The app records sound signals with the built-in microphone. The time points of the audio signals are exchanged to the other devices and the positions are calculated by the evaluation of the time differences of arrival (TDOA). This is also known as "multilateration".