HearUsHere is an location based nonlinear storytelling platform and app for iPhone and Android.
Compose your own audio experiences on any location. Create your personal experience with 'fade-ins' and 'cross-fades' simply by changing location and create your route. HearUsHere uses GPS coordinates along with iBeacon/Bluetooth devices to place sounds on a location or object with an adjustable volume radius.
I created the Android app for this project. The app mixes sounds, fading them in and out based on your distance to the sounds, both GPS and bluetooth based. The app is multi-functional: it presents the closest "hear us here" story, which you can start right away by navigating into the audiotour perimiter.