Acoustical Science and Technology
Online ISSN : 1347-5177
Print ISSN : 1346-3969
ISSN-L : 0369-4232
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Volume 44, Issue 4
Displaying 1-7 of 7 articles from this issue
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PAPER
  • An isotropic sound field model composed of a finite number of plane waves
    Tatsuhiro Tanaka, Makoto Otani
    2023 Volume 44 Issue 4 Pages 317-327
    Published: July 01, 2023
    Released on J-STAGE: July 01, 2023
    DOIhttps://doi.org/10.1250/ast.44.317
    JOURNAL FREE ACCESS
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    Isotropy is a fundamental property of a diffuse sound field. Although several studies have proposed an isotropy indicator to quantify the extent of the isotropy of a sound field, what is not yet very clear is how to interpret the quantified isotropy using these indicators. This study aims to contribute to the understanding of the isotropy by (i) modifying an existing isotropy indicator based on the spherical harmonic expansion and (ii) presenting isotropic sound field model composed of a finite number of plane waves. Theoretical and numerical investigations show that a limited-degree isotropy can be established by using the isotropy indicator and the isotropic sound field model.

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