Analysis and Adjustment of Planar Microphone Arrays for Application in Directional Audio Coding

Ahonen J, Del Galdo G, Kallinger M, Küch F, Pulkki V, Schultz-Amling R. Analysis and Adjustment of Planar Microphone Arrays for Application in Directional Audio Coding. In: AES Convention 124. Audio Engineering Society; 2008. Paper 7374. Available from: https://aes.org/publications/elibrary-page/?id=14504

@inproceedings{Ahonen2008_14504,
  author = {Ahonen, Jukka and Del Galdo, Giovanni and Kallinger, Markus and Küch, Fabian and Pulkki, Ville and Schultz-Amling, Richard},
  title = {{Analysis and Adjustment of Planar Microphone Arrays for Application in Directional Audio Coding}},
  booktitle = {AES Convention 124},
  note = {Paper 7374},
  year = {2008},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14504}
}

TY  - CPAPER
TI  - Analysis and Adjustment of Planar Microphone Arrays for Application in Directional Audio Coding
AU  - Ahonen, Jukka
AU  - Del Galdo, Giovanni
AU  - Kallinger, Markus
AU  - Küch, Fabian
AU  - Pulkki, Ville
AU  - Schultz-Amling, Richard
T2  - AES Convention 124
M1  - Paper 7374
PY  - 2008
DA  - 2008/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14504
PB  - Audio Engineering Society
LA  - en
AB  - Directional Audio Coding (DirAC) is a well-established and efficient way to capture and reproduce a spatial sound event. In a recording room, DirAC requires four spatially coincident microphones to estimate the desired parameters, i.e., direction-of-arrival and diffuseness of sound: one omnidirectional and three figure-of-eight microphones pointing along the axes of a three-dimensional Cartesian coordinate system. In most consumer applications only two dimensional scenes need to be reproduced, implying that only two figure-of-eight microphones are required. Furthermore, instead of directional microphones, arrays of omnidirectional microphones are considered for economic reasons. Therefore, we investigate various two-dimensional microphone configurations with respect to their usability for DirAC. We derive theoretical limits for the correct estimation of both direction-of-arrival and diffuseness for the most suitable planar arrays. Furthermore, we suggest a way to equalize the systematic bias for the direction-of-arrival estimation, introduced by the discrete planar arrays.
ER  -