Sonification would be an interesting approach for my project. Here are a few good references:

• CITY SYMPHONIES: “Electric cars are increasingly using synthesised sounds in order to mimic the recognisable noise of the internal combustion engine. I explore an alternative in which the sound that the cars generate changes according to its relationship to other road users and the environment.”
• Sonata for the Unaware, by Alexander Chen, who also did Conductor.
• Ambient Addition by Noah Vawter: “(Download) (6MB QuickTime .mov, 3:15) Ambient Addition is a Walkman with binaural microphones. A tiny Digital Signal Processing (DSP) chip analyzes the microphone’s sound and superimposes a layer of harmony and rhythm on top of the listener’s world. ”