The Audio Engineering Society 16th International Conference: Spatial Sound Reproduction, 10-12 April 1999


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

University of Michigan
Department of Electrical Engineering and Computer Science
Ann Arbor, Michigan, U.S.A.

This paper introduces Spatial Frequency Response Surfaces (SFRS's), an 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 the perceptual quality of interpolated and non-interpolated HRTF's.

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Last modified: 12.03.1999