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J. Mathews, and J. Braasch, "Sparse Iterative Beamforming Using Spherical Microphone Arrays for Low-Latency Direction of Arrival Estimation in Reverberant Environments," J. Audio Eng. Soc., vol. 69, no. 12, pp. 967-977, (2021 December.). doi: https://doi.org/10.17743/jaes.2021.0057 J. Mathews, and J. Braasch, "Sparse Iterative Beamforming Using Spherical Microphone Arrays for Low-Latency Direction of Arrival Estimation in Reverberant Environments," J. Audio Eng. Soc., vol. 69 Issue 12 pp. 967-977, (2021 December.). doi: https://doi.org/10.17743/jaes.2021.0057
Abstract: Acoustic direction of arrival estimation methods allows positional information about sound sources to be transmitted over a network using minimal bandwidth. For these purposes,methods that prioritize low computational overhead and consistent accuracy under non-ideal conditions are preferred. The estimation method introduced in this paper uses a set of steered beams to estimate directional energy at sparsely distributed orientations around a spherical microphone array. By iteratively adjusting beam orientations based on the orientation of maximum energy, an accurate orientation estimate of a sound source may be produced with minimal computational cost. Incorporating conditions based on temporal smoothing and diffuse energy estimation further refines this process. Testing under simulated conditions indicates favorable accuracy under reverberation and source discrimination when compared with several other contemporary localization methods. Outcomes include an average localization error of less than 10? under 2 s of reverberation time (T60) and the potential to separate up to four sound sources under the same conditions. Results from testing in a laboratory environment demonstrate potential for integration into real-time frameworks.

@article{mathews2021sparse,
author={mathews, jonathan and braasch, jonas},
journal={journal of the audio engineering society},
title={sparse iterative beamforming using spherical microphone arrays for low-latency direction of arrival estimation in reverberant environments},
year={2021},
volume={69},
number={12},
pages={967-977},
doi={https://doi.org/10.17743/jaes.2021.0057},
month={december},} @article{mathews2021sparse,
author={mathews, jonathan and braasch, jonas},
journal={journal of the audio engineering society},
title={sparse iterative beamforming using spherical microphone arrays for low-latency direction of arrival estimation in reverberant environments},
year={2021},
volume={69},
number={12},
pages={967-977},
doi={https://doi.org/10.17743/jaes.2021.0057},
month={december},
abstract={acoustic direction of arrival estimation methods allows positional information about sound sources to be transmitted over a network using minimal bandwidth. for these purposes,methods that prioritize low computational overhead and consistent accuracy under non-ideal conditions are preferred. the estimation method introduced in this paper uses a set of steered beams to estimate directional energy at sparsely distributed orientations around a spherical microphone array. by iteratively adjusting beam orientations based on the orientation of maximum energy, an accurate orientation estimate of a sound source may be produced with minimal computational cost. incorporating conditions based on temporal smoothing and diffuse energy estimation further refines this process. testing under simulated conditions indicates favorable accuracy under reverberation and source discrimination when compared with several other contemporary localization methods. outcomes include an average localization error of less than 10? under 2 s of reverberation time (t60) and the potential to separate up to four sound sources under the same conditions. results from testing in a laboratory environment demonstrate potential for integration into real-time frameworks.},}

TY - paper
TI - Sparse Iterative Beamforming Using Spherical Microphone Arrays for Low-Latency Direction of Arrival Estimation in Reverberant Environments
SP - 967 EP - 977
AU - Mathews, Jonathan
AU - Braasch, Jonas
PY - 2021
JO - Journal of the Audio Engineering Society
IS - 12
VO - 69
VL - 69
Y1 - December 2021 TY - paper
TI - Sparse Iterative Beamforming Using Spherical Microphone Arrays for Low-Latency Direction of Arrival Estimation in Reverberant Environments
SP - 967 EP - 977
AU - Mathews, Jonathan
AU - Braasch, Jonas
PY - 2021
JO - Journal of the Audio Engineering Society
IS - 12
VO - 69
VL - 69
Y1 - December 2021
AB - Acoustic direction of arrival estimation methods allows positional information about sound sources to be transmitted over a network using minimal bandwidth. For these purposes,methods that prioritize low computational overhead and consistent accuracy under non-ideal conditions are preferred. The estimation method introduced in this paper uses a set of steered beams to estimate directional energy at sparsely distributed orientations around a spherical microphone array. By iteratively adjusting beam orientations based on the orientation of maximum energy, an accurate orientation estimate of a sound source may be produced with minimal computational cost. Incorporating conditions based on temporal smoothing and diffuse energy estimation further refines this process. Testing under simulated conditions indicates favorable accuracy under reverberation and source discrimination when compared with several other contemporary localization methods. Outcomes include an average localization error of less than 10? under 2 s of reverberation time (T60) and the potential to separate up to four sound sources under the same conditions. Results from testing in a laboratory environment demonstrate potential for integration into real-time frameworks.