Saturday, May 20, 14:45 — 16:15
P04-01 Comparison of Spatial Characteristics of Head-Related Transfer Functions between the Horizontal and Median Planes
Xiaoli Zhong (Presenting Author), Bosun Xie (Author), Guangzheng Yu (Author)
Head-related transfer functions (HRTFs) vary with source direction and thus contain major localization cues. In this work, the directional variation of HRTFs in the horizontal and median planes are studied using directional Fourier expansion. Results indicate that up to 20 kHz, the preceding 8 or 9 order elevation harmonics account for 99% variation of HRTFs in the median plane; while the preceding 31 or 32 order azimuthal harmonics account for 99% variation of HRTFs in the horizontal plane. Therefore, the horizontal-plane variation of HRTFs is more complicated in comparison to the median-plane variation. Moreover, the front-back spatial symmetry calculated from expansion weights is compared between the horizontal and median planes.
Convention Paper 9710
P04-02 An Experiment to Evaluate the Performance of a Parametric Model for the Individualization of the HRTF in the Median Plane
Pablo Gutierrez-Parera (Presenting Author), Jose J. Lopez (Author)
Individualized HRTFs for headphone reproduction provide better immersion and natural localization of sounds than non-individualized, especially for elevated positions. This paper presents an experiment to determine the accuracy of individualized parametric modeled HRTFs. The modeling of the HRTFs was done with an algorithm that detects the main peaks and notches of the HRTF and models them with a chain of second order IIR peak filters. A subjective test was carried on to compare the perception and localization of the modeled versus measured HRTFs in the median plane. The analyzed data shows that simplified modeled versions of HRTFs with a few peaks simulated can obtain similar results than measured HRTF for elevation angles in the median plane.
Convention Paper 9711
P04-03 The Influence of Symmetrical Human Ears on the Front-Back Confusion
Ramona Bomhardt (Presenting Author), Janina Fels (Author)
Human beings have two ears to localize sound sources. At a first glance, the dimensions of the right and left ears are generally very similar. Nevertheless, the individual anthropometric dimensions and shape of both ears are disparate. These differences improve localization on the cone of confusion where interaural differences do not exist. To determine the influence of asymmetric ears, individual HRTF data sets are analytically and subjectively compared with their mirrored versions.
Convention Paper 9712