Effect of subject misalignment during HRTF measurements on spatial acoustic resonances
* Präsentierender Autor
Zusammenfassung:Acoustical measurement setups for head-related transfer functions (HRTFs) are often evaluated by means of artificial heads or simple spherical shapes. Previously performed measurements or simulations on these geometrical objects, as well as the known analytical solution in case of the sphere, can be used for comparison, allowing the use of multiple distance metrics in the time, frequency and spatial domain. A new measurement object is analyzed, consisting of a sphere with cylindrical cavity resonator extensions. In contrast to the complex spectral and spatial variations in HRTFs, as well as to the comparatively flat spherical transfer functions (STFs), the newly designed shapes produce defined spectral features, that can be more easily traced over space. This promises better insight into the preservation of specific resonances by the HRTF measurement system and allows an investigation into the underlying distortion mechanisms, e.g. due to the subject's misalignment with the target position, i.e. the center of the measurement setup.