3D Sound Field Recording with Higher Order Ambisonics - Objective Measurements and Validation of Spherical Microphone

Bertet S, Daniel J, Moreau S. 3D Sound Field Recording with Higher Order Ambisonics - Objective Measurements and Validation of Spherical Microphone. In: AES Convention 120. Audio Engineering Society; 2006. Paper 6857. Available from: https://aes.org/publications/elibrary-page/?id=13661

@inproceedings{Bertet2006_13661,
  author = {Bertet, Stéphanie and Daniel, Jérôme and Moreau, Sébastien},
  title = {{3D Sound Field Recording with Higher Order Ambisonics - Objective Measurements and Validation of Spherical Microphone}},
  booktitle = {AES Convention 120},
  note = {Paper 6857},
  year = {2006},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13661}
}

TY  - CPAPER
TI  - 3D Sound Field Recording with Higher Order Ambisonics - Objective Measurements and Validation of Spherical Microphone
AU  - Bertet, Stéphanie
AU  - Daniel, Jérôme
AU  - Moreau, Sébastien
T2  - AES Convention 120
M1  - Paper 6857
PY  - 2006
DA  - 2006/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13661
PB  - Audio Engineering Society
LA  - en
AB  - Higher Order Ambisonics (HOA) is a flexible approach for representing and rendering 3D sound fields. Nevertheless, lack of effective microphone systems limited its use until recently. As a result of authors’ previous work on the theory and design of spherical microphone arrays, a 4th order HOA microphone has been built, measured and used for natural recording. The present paper first discusses theoretical aspects and physical limitations proper to discrete, relatively small arrays (spatial aliasing, low-frequency estimation). Then it focuses on the objective validation of such microphones. HOA directivities reconstructed from simulated and measured 3D responses are compared to the expected spherical harmonics. Criteria like spatial correlation help characterizing the encoding artifacts due to the model limitations and the prototype imperfections. Impacts on localisation criteria are evaluated.
ER  -