Design of Ambisonic Decoders for Irregular Arrays of Loudspeakers by Non-Linear Optimization

Benjamin E, Heller A, Lee R. Design of Ambisonic Decoders for Irregular Arrays of Loudspeakers by Non-Linear Optimization. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8243. Available from: https://aes.org/publications/elibrary-page/?id=15665

@inproceedings{Benjamin2010_15665,
  author = {Benjamin, Eric and Heller, Aaron and Lee, Richard},
  title = {{Design of Ambisonic Decoders for Irregular Arrays of Loudspeakers by Non-Linear Optimization}},
  booktitle = {AES Convention 129},
  note = {Paper 8243},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15665}
}

TY  - CPAPER
TI  - Design of Ambisonic Decoders for Irregular Arrays of Loudspeakers by Non-Linear Optimization
AU  - Benjamin, Eric
AU  - Heller, Aaron
AU  - Lee, Richard
T2  - AES Convention 129
M1  - Paper 8243
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15665
PB  - Audio Engineering Society
LA  - en
AB  - In previous papers, the present authors described techniques for design, implementation, and evaluation of Ambi-sonic decoders for regular loudspeaker arrays. However, to accommodate domestic listening rooms, irregular arrays are often required. Because the figures of merit used to predict decoder performance are non-linear functions of speaker positions, non-linear optimization techniques are needed. In this paper we discuss the implementation of an open-source application based on the NLopt non-linear optimization software library that derives decoders for arbi-trary arrays of loudspeakers, as well as providing a prediction of their performance using psychoacoustic criteria, such as Gerzon’s velocity and energy localization vectors. We describe the implementation and optimization crite-ria, and report on listening tests comparing the decoders produced.
ER  -