Numerical sound field analysis considering atmospheric conditions

Satoshi Ogawa, Yasuhiro Oikawa

    研究成果: Conference contribution

    抄録

    Some systems such as an outdoor public address system and radio acoustic sounding system create loud sounds. The sounds need to be propagated to the desired location for efficient public address. However, sound is greatly affected by atmospheric conditions particularly for long-distance propagation, and it is important to comprehend atmospheric effects. Numerical methods based on geometric acoustics or linear wave acoustics are widely used today for sound field analysis. However, these methods cannot easily consider atmospheric conditions. In addition, we cannot analyze nonlinear sound fields by these methods. In the present paper, we propose a method for analyzing sound fields considering atmospheric conditions and nonlinearity. Equations for numerical sound field analysis, with which we can consider various atmospheric conditions and nonlinearity, are derived from the equations of continuity in fluid dynamics, the Navier-Stokes equations and the law of the conservation of energy. We present numerical calculations of acoustic radiation characteristics and sound fields based on the equations we have obtained, and we use the finite-difference time-domain method to solve them. The effects of atmospheric conditions such as wind, viscosity and nonlinearity can be seen in the results, and thus, the sound generation and sound wave propagation can be comprehended in detail.

    元の言語English
    ホスト出版物のタイトル42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life
    出版者OAL-Osterreichischer Arbeitsring fur Larmbekampfung
    ページ3254-3261
    ページ数8
    4
    ISBN(印刷物)9781632662675
    出版物ステータスPublished - 2013
    イベント42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013 - Innsbruck
    継続期間: 2013 9 152013 9 18

    Other

    Other42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013
    Innsbruck
    期間13/9/1513/9/18

    Fingerprint

    sound fields
    meteorology
    acoustics
    nonlinearity
    sound waves
    public address systems
    acoustic sounding
    atmospheric effects
    wave generation
    fluid dynamics
    finite difference time domain method
    continuity
    Navier-Stokes equation
    conservation
    wave propagation
    viscosity
    propagation

    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

    これを引用

    Ogawa, S., & Oikawa, Y. (2013). Numerical sound field analysis considering atmospheric conditions. : 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life (巻 4, pp. 3254-3261). OAL-Osterreichischer Arbeitsring fur Larmbekampfung.

    Numerical sound field analysis considering atmospheric conditions. / Ogawa, Satoshi; Oikawa, Yasuhiro.

    42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life. 巻 4 OAL-Osterreichischer Arbeitsring fur Larmbekampfung, 2013. p. 3254-3261.

    研究成果: Conference contribution

    Ogawa, S & Oikawa, Y 2013, Numerical sound field analysis considering atmospheric conditions. : 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life. 巻. 4, OAL-Osterreichischer Arbeitsring fur Larmbekampfung, pp. 3254-3261, 42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013, Innsbruck, 13/9/15.
    Ogawa S, Oikawa Y. Numerical sound field analysis considering atmospheric conditions. : 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life. 巻 4. OAL-Osterreichischer Arbeitsring fur Larmbekampfung. 2013. p. 3254-3261
    Ogawa, Satoshi ; Oikawa, Yasuhiro. / Numerical sound field analysis considering atmospheric conditions. 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life. 巻 4 OAL-Osterreichischer Arbeitsring fur Larmbekampfung, 2013. pp. 3254-3261
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