Spectral components of head-related transfer functions (HRTFs) are highly dependent on the anthropometric characteristics of subjects. In the low frequency range, a common structure is often found in HRTFs from different subjects. However, individual differences are seen at high frequencies. In binaural synthesis with non-individual HRTFs, localization errors occur if the spectral characteristics of the directional filters used do not match the individual characteristic of the listener. This investigation is focused on the spectral characteristics of HRTFs that are relevant as localization cues and how to parameterize them. This is done by cross-matching individual and non-individual HRTFs from different subjects according to the results of localization experiments.
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