Regularized HRTF fitting using spherical harmonics

TitleRegularized HRTF fitting using spherical harmonics
Publication TypeConference Papers
Year of Publication2009
AuthorsZotkin DN, Duraiswami R, Gumerov NA
Conference NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2009. WASPAA '09
Date Published2009/10//
ISBN Number978-1-4244-3678-1
KeywordsAcoustic applications, acoustic field, Acoustic fields, acoustic intensity measurement, Acoustic measurements, acoustic signal processing, Acoustic testing, acoustic waves, array signal processing, audio acoustics, circular arrays, computational analysis, Ear, ear location, head-related transfer function, Helmholtz reciprocity principle, HRTF, HRTF fitting, Loudspeakers, Microphones, Position measurement, signal reconstruction, spatial audio, spectral reconstruction, spherical harmonics, Transfer functions

By the Helmholtz reciprocity principle, the head-related transfer function (HRTF) is equivalent to an acoustic field created by a transmitter placed at the ear location. Therefore, it can be represented as a spherical harmonics spectrum - a weighted sum of spherical harmonics. Such representations are useful in theoretical and computational analysis. Many different (often severely undersampled) grids are used for HRTF measurement, making the spectral reconstruction difficult. In this paper, two methods of obtaining the spectrum are presented and analyzed both on synthetic (ground-truth data available) and real HRTF measurements.