Perceptual Evaluation of Systematic Modifications to Head and Pinna Geometries
* Präsentierender Autor
Zusammenfassung:Head-related transfer functions (HRTFs) are known to be highly subject-specific, due to vary-ing expressions of anthropometric features, such as the shape and size of head, pinna and tor-so geometries, between humans and especially between children and adults. Modern 3D-scanners capture the shape of these features with a high level of accuracy. Com-bined with well-established simulation methods, e.g. the boundary element method (BEM) it is possible to simulate their effect on the sound field as it is captured by the HRTF. In addi-tion, these 3D-shapes can be manipulated, in order to introduce systematically controlled an-thropometric differences to assess their effect on the HRTF and the resulting perceptual dif-ferences. In this study, the effect of controlled modifications to the head and pinna geometry of a known artificial head geometry on perceptual parameters is evaluated. Shape parameters of the outer ear are modified and the effect on the HRTF is evaluated in a listening test in order to be able to compare the perceptual effects to those exhibited by children, who are known to perceive the same sound field different compared to adults.