Spherical Microphone Array Shape to Improve Beamforming Performance

Yazawa S, Itou H, Noguchi K, Kobayashi K, Harada N. Spherical Microphone Array Shape to Improve Beamforming Performance. In: AES Convention 147. Audio Engineering Society; 2019. Paper 10228. Available from: https://aes.org/publications/elibrary-page/?id=20601

@inproceedings{Yazawa2019_20601,
  author = {Yazawa, Sakurako and Itou, Hiroaki and Noguchi, Ken’ichi and Kobayashi, Kazunori and Harada, Noboru},
  title = {{Spherical Microphone Array Shape to Improve Beamforming Performance}},
  booktitle = {AES Convention 147},
  note = {Paper 10228},
  year = {2019},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20601}
}

TY  - CPAPER
TI  - Spherical Microphone Array Shape to Improve Beamforming Performance
AU  - Yazawa, Sakurako
AU  - Itou, Hiroaki
AU  - Noguchi, Ken’ichi
AU  - Kobayashi, Kazunori
AU  - Harada, Noboru
T2  - AES Convention 147
M1  - Paper 10228
PY  - 2019
DA  - 2019/10/06
UR  - https://aes.org/publications/elibrary-page/?id=20601
PB  - Audio Engineering Society
LA  - en
AB  - A 360-degree steerable super-directional beamforming are proposed. We designed a new acoustic baffle for spherical microphone array to achieve both small size and high performance. The shape of baffle is a sphere with parabola-like depressions; therefore, sound-collection performance can be enhanced using reflection and diffraction. We first evaluated its beamforming performance through simulation then fabricated a 3D prototype of an acoustic baffle microphone array with the proposed baffle shape and compared its performance to that of a conventional spherical 3D acoustic baffle. This prototype exhibited better beamforming performance. We built microphone array system that includes the proposed acoustic baffle and a 360-degree camera, our system can pick up match sound to an image in a specific direction in real-time or after recording. We have received high marks from users who experienced the system demo.
ER  -