Spherical Harmonic Spectra of Head-Related Transfer Functions

Evans MJ, Angus JAS, Tew AI. Spherical Harmonic Spectra of Head-Related Transfer Functions. In: AES Convention 103. Audio Engineering Society; 1997. Paper 4571. Available from: https://aes.org/publications/elibrary-page/?id=7208

@inproceedings{Evans1997_7208,
  author = {Evans, Michael J. and Angus, James A. S. and Tew, Anthony I.},
  title = {{Spherical Harmonic Spectra of Head-Related Transfer Functions}},
  booktitle = {AES Convention 103},
  note = {Paper 4571},
  year = {1997},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=7208}
}

TY  - CPAPER
TI  - Spherical Harmonic Spectra of Head-Related Transfer Functions
AU  - Evans, Michael J.
AU  - Angus, James A. S.
AU  - Tew, Anthony I.
T2  - AES Convention 103
M1  - Paper 4571
PY  - 1997
DA  - 1997/09/06
UR  - https://aes.org/publications/elibrary-page/?id=7208
PB  - Audio Engineering Society
LA  - en
AB  - Head-Related Transfer Functions (HRTFs) represent the filtering that sound signal is subjected to between its source at a particular spatial location and its detection at the ears. Encoded into a set of HRTFs are the acoustic cues which our auditory system will use to perceive the sound signal as emanating from a particular location. Previous papers have developed a continuous model of human HRTFs by expressing each bin of the magnitude spectra in the form of a weighted sum of surface spherical harmonics. In this paper we examine the significant and potentially insightful variations in the amplitudes of each spherical harmonic weight, as we move along the audio spectrum. We make use of representations known as Spherical Harmonic Spectra (SHSs) to illustrate these weight variations, and discuss the implications of the representation in terms of identifying physiological variations within the HRTFs, and in terms of the efficient measurement and encoding of HRTF data.
ER  -