A Qualitative Analysis of Frequency Dependencies in Ambisonics Decoding Related to Spherical Microphone Array Recording

Meyer J, Elko G. A Qualitative Analysis of Frequency Dependencies in Ambisonics Decoding Related to Spherical Microphone Array Recording. In: AES Conference: 2016 AES International Conference on Sound Field Control. Audio Engineering Society; 2016. Paper 6-1. Available from: https://aes.org/publications/elibrary-page/?id=18316

@inproceedings{Meyer2016_18316,
  author = {Meyer, Jens and Elko, Gary},
  title = {{A Qualitative Analysis of Frequency Dependencies in Ambisonics Decoding Related to Spherical Microphone Array Recording}},
  booktitle = {AES Conference: 2016 AES International Conference on Sound Field Control},
  note = {Paper 6-1},
  year = {2016},
  month = jul,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18316}
}

TY  - CPAPER
TI  - A Qualitative Analysis of Frequency Dependencies in Ambisonics Decoding Related to Spherical Microphone Array Recording
AU  - Meyer, Jens
AU  - Elko, Gary
T2  - AES Conference: 2016 AES International Conference on Sound Field Control
M1  - Paper 6-1
PY  - 2016
DA  - 2016/07/06
UR  - https://aes.org/publications/elibrary-page/?id=18316
PB  - Audio Engineering Society
LA  - en
AB  - Encoding 3D spatial audio signals by spherical microphone array eigenbeamforming which, is closely related to Higher-order Ambisonics (HOA), is a growing field of interest. These multichannel spatial sound field encoding schemes allow for spatially realistic audio recording and playback. In a typical Ambisonics encoder, only simple scalar weights are used to generate the HOA signals for virtual sources. On the playback side, the Ambisonic signals are decoded with a frequency independent decoding matrix. However, contrary to the simple frequency independent scalar weighting schemes for virtual sources, HOA signals recorded with eigenbeamforming microphone arrays are inherently frequency dependent. This paper describes the frequency dependency of the recorded Ambisonic signals and presents a qualitative analysis of its effects on the decoder.
ER  -