The Role of Head-Related Transfer Functions' Spectral Features in Sound Source Localization in the Mid-Sagittal Plane
The individual nature of HRTFs is responsible for localization errors when non-individual HRTFs are used in binaural synthesis: localization performance is degraded if the spectral characteristics of the directional filters used do not match the individual characteristic of the listener's HRTFs. How similar the HRTFs should be to avoid degradation in the performance is still unknown. This investigation focuses on identifying and parameterizing spectral characteristics of HRTFs that are relevant as localization cues in the mid-sagittal plane. Results suggest that parameters computed from three spectral features of simplified versions of HRTFs help explaining sound source localization in that plane. Those parameters could be used for individualizing non-individual HRTFs.
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