Estimating sound intensity from acoustic data captured by parallel phase-shifting interferometry

Fumihiko Imaeda, Kenji Ishikawa, Kohei Yatabe, Yasuhiro Oikawa

研究成果: Conference contribution

抄録

Visualizing sound fields is important to understand them intuitively. Recently, sound field visualization using a parallel phase-shifting interferometer (PPSI) has been proposed. This optical method can observe a sound field instantaneously and quantitatively without placing any object inside the field. Thus, sound fields difficult for the ordinary instruments to measure can be investigated by PPSI such as the fields inside a small cavity or air flow. After a measurement, the observed data must be analyzed to obtain meaningful information in terms of acoustics. However, such analysis has not been studied much as PPSI itself is a newly developed method. In this paper, we estimate sound intensity from the data captured by PPSI. The number of the observation points of our PPSI system is up to 262,144, where the interval between the adjacent points is 0.22 mm. Therefore, sound intensity can be estimated densely at quite a lot of points. The accuracy of estimated sound intensity is investigated through numerical experiments, and then real data observed by PPSI are analyzed for visualizing the sound intensity.

本文言語English
ホスト出版物のタイトルProceedings of the 23rd International Congress on Acoustics
ホスト出版物のサブタイトルIntegrating 4th EAA Euroregio 2019
編集者Martin Ochmann, Vorlander Michael, Janina Fels
出版社International Commission for Acoustics (ICA)
ページ2765-2772
ページ数8
ISBN(電子版)9783939296157
DOI
出版ステータスPublished - 2019
イベント23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
継続期間: 2019 9 92019 9 23

出版物シリーズ

名前Proceedings of the International Congress on Acoustics
2019-September
ISSN(印刷版)2226-7808
ISSN(電子版)2415-1599

Conference

Conference23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
国/地域Germany
CityAachen
Period19/9/919/9/23

ASJC Scopus subject areas

  • 機械工学
  • 音響学および超音波学

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