Acoustic Field around an Exit of Flanged Cylindrical Duct with a Coaxial Cavity
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概要
- 論文の詳細を見る
In relation to reduction and passive control of noises emitted from ducts or openings of machineries, the acoustic field radiated from a flanged cylindrical duct having a coaxial cavity at the exit of the duct was investigated for various depths and radii of the cavity. Structures of the acoustic field generated by a sound source located at a distance from the exit were analyzed numerically using the finite difference method. Also, experiments were conducted to obtain the distribution of acoustic pressure levels and acoustic intensities around the exit using a three-dimensional intensity microphone system. It is shown that the cavity attached to the duct affects the acoustic field markedly and an appropriate configuration of the cavity reduces sound pressure level significantly. It is also shown that the acoustic field is well simulated by the present numerical calculation method.
- 一般社団法人日本機械学会の論文
- 1998-08-15
著者
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Hayashi Koichi
Department Of Internal Medicine Keio University School Of Medicine
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Tanaka Koichi
Department Of Forensic Medicine And Molecular Pathology Graduate School Of Medicine Kyoto University
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Tsubakishita Yasuji
Department Of Mechanical Engineering Chubu University
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Hayashi K
Department Of Mechanical Engineering Nagoya Institute Of Technology
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Hayashi Koichi
Department Of Dermatology Shinshu University School Of Medicine
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Tanaka Koichi
Department Of Chemistry And Materials Engineering Faculty Of Chemistry Materials And Bioengineering
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Tanaka Koichi
Department Of Anatomy School Of Medicine Chiba University
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TANAKA Koichi
Department of Anatomy and Cell Biology, Hyogo College of Medicine, 1–1 Mukogawa-cho, Nishinomiya, Hyogo 663–8501, Japan
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