3D audio systems add a spatial dimension to sounds in analogy to vision. In conjunction with appropriate input techniques, interactive spatial audio systems can be designed for a variety of purposes. In order to design usable systems it is necessary to understand the way humans interact with sound.
This can be achieved by evaluating the usability of interactive spatial audio designs. Examples will be provided, two studies on the evaluation of pointing to 3D audio targets and two studies on the evaluation of spatial audio as an interactive tool for music performance.
Based on these research results and the current literature application designs for mobile human computer interaction, navigation and interactive music performance will then be briefly outlined. Finally, future directions for the design and evaluation of interactive spatial audio systems will be discussed.