Verbesserung der virtuellen Akustik für Kopfhörer durch Berücksichtigung von Schulterdrehungen relativ zum Kopf

Thesis

Human auditory perception obtains most of the directional localization of sound events from level and time differences (ILD, ITD) of incident sounds on both ears. In virtual acoustics, this is simulated by head-related, frequency-dependent filters (HRTFs). In practical measurements of these filters, a rigid geometry between head and shoulder is considered most often. However recend studies have shown that the rotation of the head relative to the shoulder axis has effects on the HRTFs in some areas. Consequently, the head rotation in these areas also affects aural perception and directional localization. With the help of further filters, thes influence on the HRTFs can be reproduced. In the first part of this project, different relalisations of a virtual acoustic environment were produced by means of PD, which take into account the influence of the soulder rotation relative to the head. The necessary impulse responses were measured by Markus Guldenschuh in his project "Untersuchung des Schultereinflusses auf HRIRs" and provided for this project. The realisations only led to humble results. Therefore the perception of shoulder rotation was illuminated in the second part of this project. For this purpose a listening test was done, investigating the perception differences of static and dynamically rotating shoulder.