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デジタル記事
インターネットで読める国立国会図書館全国の図書館
- 要約等It is well-known that an absorptive obstacle installed on the edge of a noise barrier improvessound shielding efficiency without increasing the height of the barrier. In the present study, the efficiency of a noise barrier with an acoustically “soft” cylindrical edge is investigated. “Soft” indicates that the sound pressure at the surface is zero. It ...... however, frotraditional materials to achieve a soft surface. It is shown that a “Waterwheel cylinder” approximates a soft surface by both theoretical and experimental analysis in a twodimensionalsound field. The Waterwheel consists of acoustic tubes arranged radially; therefore, t...
- 参照Equivalence in diffraction-reducing efficiency between T-profile and thick barrier against road traffic noise High-performance noise proof cover using acoustic tube
- 出版者（掲載誌）Tokyo : Acoustical Society of Japan
デジタル記事障害者向け資料あり
インターネットで読める国立国会図書館
- 要約等It is well-known that an absorptive obstacle installed on the edge of a noise barrier improves sound shielding efficiency without increasing the height of the barrier. In the present study, the efficiency of a noise barrier with an acoustically "soft" cylindrical edge is investigated. "Soft" indicates that the sound pressure at the surface is zero. It ......however, for traditional materials to achieve a soft surface. It is shown that a "Waterwheel cylinder" approximates a soft surface by both theoretical and experimental analysis in a two-dimensional sound field. The Waterwheel consists of acoustic tubes arranged radially; therefore, t...
- 件名Noise barrier Cylindrical edge Soft surface One-quarter-wavelength acoustic tubes
- 一般注記著者所属: Department of Acoustic Design, Kyushu Institute of Design
デジタル記事
全国の図書館
- 要約等<jats:p>This paper examines the sound shielding efficiency of a noise barrier having an acoustically soft cylindrical edge, as it compares to that provided by the well-known absorptive cylindrical edge. It has been reported that the waterwheel-shaped cylinder (acoustic tubes in a radial arrangement) approximates a soft surface cylinder, and that the sound shielding efficiency of a noise barrier is improved by placing the cylinder on its edge. The efficiency of the waterwheel-shaped edge barrier is strongly fr......ovement in overall sound pressure level is smaller than expected when......e source is broadband noise. The present study...
- 件名Acoustics and Ultrasonics Arts and Humanities (miscellaneous)
- 参照Efficiency of edge-modified noise barriers: Intrinsic efficiency determination of practical products and prediction of the diffracted sound field Noise-shielding efficiency of barriers with eaves High-performance noise proof cover using acoustic tube
デジタル記事
インターネットで読める全国の図書館
- 要約等It is well-known that an absorptive obstacle installed on the edge of a noise barrier improvessound shielding efficiency without increasing the height of the barrier. In the present study, the efficiency of a noise barrier with an acoustically “soft” cylindrical edge is investigated. “Soft” indicates that the sound pressure at the surface is zero. It ...... however, frotraditional materials to achieve a soft surface. It is shown that a “Waterwheel cylinder” approximates a soft surface by both theoretical and experimental analysis in a twodimensionalsound field. The Waterwheel consists of acoustic tubes arranged radially; therefore, t...
- 件名One-quarter-wavelength acoustic tubes Soft surface Cylindrical edge Noise barrier
- 著者標目Okubo Tomonao Fujiwara Kyoji
デジタル博士論文
インターネットで読める全国の図書館
- 並列タイトル等（連結）Efficiency of a noise barrier with an acoustically soft cylindrical edge
- 並列タイトル等Efficiency of a noise barrier with an acoustically soft cylindrical edge
- 学位博士（工学） DOCTOR OF ENGINEERING
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