Analysis Of The Spectral Variations In Repeated Head-Related Transfer Function Measurements
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This paper discusses the range of spectral variations between HRTF sets measured on the same subjects. The analysis is done in a corpus of 40 HRTF datasets of 4 subjects (10 datasets per subject). Variations are observed as a function of frequency, distance of the ears to the sound source (ipsilateral or contralateral), and location. Assessments of the spatial quality of all datasets were made through a subjective study which confirmed that despite their spectral variations, all individually measured HRTF sets maintained a high degree of spatial realism. An understanding of the variability in HRTFs can offer new intuition on objective binaural filter evaluation, and has significance in the research fields of spatial audio reproduction and virtual auditory display.