Are full-range loudspeakers necessary for the top layer of Three-Dimensional audio?

Kamekawa T, Marui A. Are full-range loudspeakers necessary for the top layer of Three-Dimensional audio? In: AES Convention 148. Audio Engineering Society; 2020. Paper 10362. Available from: https://aes.org/publications/elibrary-page/?id=20779

@inproceedings{Kamekawa2020_20779,
  author = {Kamekawa, Toru and Marui, Atsushi},
  title = {{Are full-range loudspeakers necessary for the top layer of Three-Dimensional audio?}},
  booktitle = {AES Convention 148},
  note = {Paper 10362},
  year = {2020},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20779}
}

TY  - CPAPER
TI  - Are full-range loudspeakers necessary for the top layer of Three-Dimensional audio?
AU  - Kamekawa, Toru
AU  - Marui, Atsushi
T2  - AES Convention 148
M1  - Paper 10362
PY  - 2020
DA  - 2020/05/06
UR  - https://aes.org/publications/elibrary-page/?id=20779
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 difference) and ITD (Inter-aural time difference). However, in the vertical direc-tion, spectral cue and directional band caused by the difference in the frequency characteristic of the direction of arrival of sound caused by the shape of the ear, are crucial. The authors investigated the difference between the original 22.2 multichannel sound and its ?ltered sound by limiting the playback frequency band of its top layer using various contents. The results demonstrated that there were no signi?cant differences in spatial impression, even if the top layer does not have a band below approximately 400 Hz.
ER  -