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

Fumihiko Imaeda, Kenji Ishikawa, Kohei Yatabe, Yasuhiro Oikawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Congress on Acoustics
Subtitle of host publicationIntegrating 4th EAA Euroregio 2019
EditorsMartin Ochmann, Vorlander Michael, Janina Fels
PublisherInternational Commission for Acoustics (ICA)
Pages2765-2772
Number of pages8
ISBN (Electronic)9783939296157
DOIs
Publication statusPublished - 2019
Event23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019 - Aachen, Germany
Duration: 2019 Sep 92019 Sep 23

Publication series

NameProceedings of the International Congress on Acoustics
Volume2019-September
ISSN (Print)2226-7808
ISSN (Electronic)2415-1599

Conference

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

Keywords

  • Least squares method
  • Optical measurement
  • Polynomial approximation
  • Sound visualization

ASJC Scopus subject areas

  • Mechanical Engineering
  • Acoustics and Ultrasonics

Fingerprint

Dive into the research topics of 'Estimating sound intensity from acoustic data captured by parallel phase-shifting interferometry'. Together they form a unique fingerprint.

Cite this