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公开(公告)号：EP1673521B1
公开(公告)日：2008-08-20
申请号：EP04789973.7
申请日：2004-10-06
发明人： HÜBELT, Jörn , KOSTMANN, Cris , WAAG, Ulf , STEPHANI, Günter , LOTZE, Gerd
CPC分类号： F01N1/24 , F01N2310/06 , F01N2310/12 , G10K11/161
摘要： The invention relates to a sound absorber that can be used to absorb sound waves transmitted by fluids. The aim of the invention is to obtain a high maximum absorption at individual frequencies with high amplitudes, and absorption of sound waves in a spread frequency spectrum, in a simple manner. To this end, the inventive sound absorber is formed, at least in certain areas, from hollow balls that are interconnected in a material fit and/or hollow cones in bulk. Furthermore, regions having different sound speeds, and a characteristic impedance and/or thickness, are adjacently arranged in the flow direction of a fluid, in a laterally successive manner or in relation to sound wave incidence angles.
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公开(公告)号：EP1673521A1
公开(公告)日：2006-06-28
申请号：EP04789973.7
申请日：2004-10-06
发明人： HÜBELT, Jörn , KOSTMANN, Cris , WAAG, Ulf , STEPHANI, Günter , LOTZE, Gerd
CPC分类号： F01N1/24 , F01N2310/06 , F01N2310/12 , G10K11/161
摘要： The invention relates to a sound absorber that can be used to absorb sound waves transmitted by fluids. The aim of the invention is to obtain a high maximum absorption at individual frequencies with high amplitudes, and absorption of sound waves in a spread frequency spectrum, in a simple manner. To this end, the inventive sound absorber is formed, at least in certain areas, from hollow balls that are interconnected in a material fit and/or hollow cones in bulk. Furthermore, regions having different sound speeds, and a characteristic impedance and/or thickness, are adjacently arranged in the flow direction of a fluid, in a laterally successive manner or in relation to sound wave incidence angles.
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