Implementierung eines positionsbestimmten Lichtzeigers

The objective of this project is the implementation of a prototype used for carrying out the measurement of the perceived sound source positions in a three dimensional space. Even there are already reported studies in literature it is difficult to develop a practicable and accurate system for such an intention.

Our proposed approach is based in the usage of a pointing device which is tracked by infrared cameras. The pointing device is equipped with a laser diode. Pointing to a certain perceived direction enables the test person to get a visual feedback in which direction she/he is actually pointing to. Furthermore the test person is also equipped with a target on its head. The invented system is able to measure the direction of the perceived/pointed position in relation to the origin of the head related coordinate system. This direction is expressed as elevation and azimuth.

The tracked laser pointing device is implemented and performed in the IEM CUBE at the Institute for Electronic Music and Acoustics (Graz). In addition to implementation the accuracy of the method concerning inexact assumptions and errors made during the calculation process are investigated. Finally an informal listening test concerning two different 3D audio rendering approaches (VBAP & HOA) will be performed and evaluated using the new tool.