Spatial Frequency Response Surfaces (SFRS's): An Alternative Visualization and Interpolation Technique for Head-Related Transfer Functions (HRTF's)
Corey I. Cheng, Gregory H. Wakefield
Department of Electrical Engineering and Computer Science
Ann Arbor, Michigan, U.S.A.
This paper introduces Spatial Frequency Response Surfaces (SFRS's),
alternative, spatial-domain visualization tool for head-related transfer
functions (HRTF's). Qualitative analysis of SFRS's is easier than direct
comparison of HRTF magnitude responses, and reveals many cross-subject
similarities in HRTF data corresponding to well-known HRTF-related
psychophysical phenomena. We present an SFRS-based HRTF interpolation
algorithm, along with results of a psychophysical experiment comparing
perceptual quality of interpolated and non-interpolated HRTF's.
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