My PhD research focused on the use of sonification, or using sound to represent data. I was particularly interested in using sound to represent spatial data, and how it could be best combined with visual representations of data. Below are some videos showing how the sonification could work, in ArcGIS and Google Maps. The code for both is available to download. Remember the ArcGIS code is written in VBA, so you need the VBA extension activated to run it. Check the readme.txt file for details.