| Item type |
会議発表論文 / Conference Paper(1) |
| 公開日 |
2010-12-14 |
| タイトル |
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タイトル |
[N349] An In-duct Method for Determination of Oblique Incidence Reflection Factors |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
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資源タイプ |
conference paper |
| 著者 |
寺尾, 道仁
Terao, Michihito
関根, 秀久
Sekine, Hidehisa
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The free-field methods for determining the reflection factor of a surface lose their validity especially when the incidence angle becomes larger than about 30 degrees and the frequency becomes lower than about 1,000 Hz even though the surface is a homogeneous flat wall, because of the contamination by the diffracted waves from the edges of the truncated test piece. To overcome the difficulties of the free-field methods, an in-duct method has been introduced here. In this method a test piece is installed at one end of a duct, and the cross-modes of interest are excited from the other end. The complex pressure amplitudes of the incidence and reflected waves of each of the modes can be extracted from the sound pressures observed in the duct field. Numerical simulations were carried out using a boundary element approach. The effectiveness of the in-duct method was confirmed by comparing its results to theoretical ones for a locally reacting surface. By using this method, oblique incidence reflection factors have been determined for several surfaces of extended reaction such as a fiberglass-board backed with a rigid wall and a sound-absorbent wedge array. |
| 内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
会議名称:The 32nd International Congress and Exposition on Noise Control Engineering |
| 内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
主催学会:KSNVE/ASK |
| 書誌情報 |
INTER-NOISE 2003 : August 25-28, 2003. international convention center jeju seogwipo, Korea
p. 3398-3399,
発行日 2003
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| ISBN |
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識別子タイプ |
ISBN |
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関連識別子 |
8995218916 |
| 著者版フラグ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 出版者 |
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出版者 |
Institute of Noise Control Engineering |
| 資源タイプ |
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内容記述タイプ |
Other |
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内容記述 |
Article |
18-2 inter･noise200308-1.pdf (293.6 kB)
