The main idea of this prototype is to create a menu where each user can select a specific option (for example to select a language).
But this kind of interaction could also be used in big spaces (especially outdoor I guess) to drive the user just by the sound.
NOTE: THIS IS JUST A PROTOTYPE. I feel pretty stupid wearing this big cap covered of tags because I need the position and orientation of the user in the space. Actually I'm using artoolkit to obtain this data but of course this is not the technology used for the final product. Normally the user just wear wireless headphones.