Physical-model-based reconstruction of axisymmetric three-dimensional sound field from optical interferometric measurement

Kenji Ishikawa, Kohei Yatabe, Yasuhiro Oikawa

Research output: Contribution to journalArticlepeer-review

Abstract

Optical interferometric measurement methods for sound fields have garnered considerable attention owing to their contactless nature. The capabilities of non-invasive measurement and reconstruction of three-dimensional sound fields are significant for characterizing acoustic transducers. However, three-dimensional reconstructions are typically time consuming because of the two-dimensional scanning and rotation of the measurement system. This paper presents a scan and rotation-free reconstruction of an axisymmetric sound field in the human hearing range. A physical-model-based algorithm is proposed to reconstruct an axisymmetric sound field from optical interferograms recorded using parallel phase-shifting interferometry and a high-speed polarization camera. We demonstrate that audible sound fields can be reconstructed from data measured in 10 ms. The proposed method is effective for the rapid evaluation of axially symmetric acoustic transducers.

Original languageEnglish
Article number045202
JournalMeasurement Science and Technology
Volume32
Issue number4
DOIs
Publication statusPublished - 2021 Apr

Keywords

  • Acoustic transducer
  • Acousto-optic effect
  • Helmholtz equation
  • High-speed camera
  • Optical sound measurement
  • Parallel phase-shifting interferometry

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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