The effect of head tilt on the perception of the top layer of three-dimensional audio

Kamekawa T, Marui A, Howie W. The effect of head tilt on the perception of the top layer of three-dimensional audio. In: AES Conference: AES 2023 International Conference on Spatial and Immersive Audio. Audio Engineering Society; 2023. Paper 24. Available from: https://aes.org/publications/elibrary-page/?id=22194

@inproceedings{Kamekawa2023_22194,
  author = {Kamekawa, Toru and Marui, Atsushi and Howie, Will},
  title = {{The effect of head tilt on the perception of the top layer of three-dimensional audio}},
  booktitle = {AES Conference: AES 2023 International Conference on Spatial and Immersive Audio},
  note = {Paper 24},
  year = {2023},
  month = aug,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=22194}
}

TY  - CPAPER
TI  - The effect of head tilt on the perception of the top layer of three-dimensional audio
AU  - Kamekawa, Toru
AU  - Marui, Atsushi
AU  - Howie, Will
T2  - AES Conference: AES 2023 International Conference on Spatial and Immersive Audio
M1  - Paper 24
PY  - 2023
DA  - 2023/08/06
UR  - https://aes.org/publications/elibrary-page/?id=22194
PB  - Audio Engineering Society
LA  - en
AB  - When a human perceives a space by hearing, horizontal sound image localization and spaciousness are sensed based on ILD (Inter-aural level differences) and ITD (Inter-aural time differences). However, in the vertical plane, spectral cues and directional bands caused by differences in the frequency characteristic of the direction of sound caused by the ear shape are crucial. Frequencies below 4 kHz do not contribute significantly to vertical localization. The authors investigated the frequency bandwidth required to reproduce the top layer within a 3D audio system by comparing the difference between various full-band 22.2 multichannel audio stimuli and those filtered stimuli to restrict the frequency bandwidth of top layer reproduction. The results of an experiment referring to PEST demonstrated cut-off frequencies were found for some sources to be around 1 kHz. Comparisons of the left and right ear signals measured by a dummy head revealed a significant difference in the high-frequency range above around 1 kHz when the head is tilted. This suggested that head tilt is important for the perception of the top layers and that the band above around 1 kHz plays an important role in this effect.
ER  -