Tactical Sound Garden
The Tactical Sound Garden [TSG] Toolkit is "an open source software platform for cultivating public 'sound gardens' within contemporary cities". In other words the Tactical Sound Garden allows anyone to create a Google Map of sounds in areas that have WiFi so that people with a WiFi enabled mobile device can then listen to the created soundscape when they are nearby.
Users of the Tactical Sound Garden [TSG] Toolkit can 'plant' sounds at a particular location. Then anyone with a WiFi enabled device can walk though the created virtual sound garden listening to the uploaded sounds.
Currently there are sound gardens in Belo Horizonte, Brazil, San Diego, CA and Zurich, Switzerland.