Effects of Near-field Sources on Ambisonics Recording and Playback

Gonzalez R, Politis Archontis, Lokki T. Effects of Near-field Sources on Ambisonics Recording and Playback. In: AES Convention 151. Audio Engineering Society; 2021. Paper 10526. Available from: https://aes.org/publications/elibrary-page/?id=21490

@inproceedings{Gonzalez2021_21490,
  author = {Gonzalez, Raimundo and {Politis Archontis} and Lokki, Tapio},
  title = {{Effects of Near-field Sources on Ambisonics Recording and Playback}},
  booktitle = {AES Convention 151},
  note = {Paper 10526},
  year = {2021},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=21490}
}

TY  - CPAPER
TI  - Effects of Near-field Sources on Ambisonics Recording and Playback
AU  - Gonzalez, Raimundo
AU  - Politis Archontis
AU  - Lokki, Tapio
T2  - AES Convention 151
M1  - Paper 10526
PY  - 2021
DA  - 2021/10/06
UR  - https://aes.org/publications/elibrary-page/?id=21490
PB  - Audio Engineering Society
LA  - en
AB  - Ambisonic recording with spherical microphone arrays (SMAs) is based on a far-field assumption which determines how microphone signals are encoded into Ambisonic signals. In the presence of a near-field source, low-frequency distance-dependent boosts arise in SMAs in similar nature to proximity effects in far-field equalized directional microphones. In this study, the effects of near-field sources on Ambisonic signals are modelled analytically, their interaction with regularization stages is observed, and then traced further across to two basic ambisonic processing operations: virtual microphones, and binaural decoding.
ER  -