Modal analysis of the scattering coefficients of an open cavity in a waveguide

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• 作者：Yuhui Tong ; Jie Pan ; ^{jie.pan@uwa.edu.au}
• 关键词：Open cavity ; Scattering coefficient ; Eigenmode ; Fano resonance
• 刊名：Wave Motion
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：68
• 期：Complete
• 页码：242-252
• 全文大小：1418 K
• 卷排序：68

文摘

The roles that frequency-dependent eigenmodes play in the acoustic scattering of an open cavity connected with rigid-wall ducts are revealed. Peaks and valleys of scattering coefficients are generally found to be result of constructive and destructive interferences between eigenmodes. An approximated equation is proposed to characterize the Fano resonance which is induced by quasi-trapped mode. The usage of frequency-dependent and frequency-independent eigenmodes for describing free and forced sound field is clarified.