Acousto-optic back-projection: Physical-model-based sound field reconstruction from optical projections

Kohei Yatabe*, Kenji Ishikawa, Yasuhiro Oikawa


研究成果: Article査読

31 被引用数 (Scopus)


As an alternative to microphones, optical techniques have been studied for measuring a sound field. They enable contactless and non-invasive acoustical observation by detecting density variation of medium caused by sound. Although they have important advantages comparing to microphones, they also have some disadvantages. Since sound affects light at every points on the optical path, the optical methods observe an acoustical quantity as spatial integration. Therefore, point-wise information of a sound field cannot be obtained directly. Ordinarily, the computed tomography (CT) method has been applied for reconstructing a sound field from optically measured data. However, the observation process of the optical methods have not been considered explicitly, which limits the accuracy of the reconstruction. In this paper, a physical-model-based sound field reconstruction method is proposed. It explicitly formulates the physical observation process so that a model mismatch of the conventional methods is eliminated.

ジャーナルJournal of Sound and Vibration
出版ステータスPublished - 2017 4月 28

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 音響学および超音波学
  • 機械工学


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