Parametric study of the influence of compression on the acoustical absorption coefficient of automotive felts |
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| Institution: | 1. Institute of Geophysics, University of Hamburg/CEN, Bundesstr. 55, 20146 Hamburg, Germany;2. Department of Earth and Environmental Sciences, Ludwig-Maximilians University Munich, Theresienstrasse 41, 80333 Munich, Germany;3. Vanuatu Meteorology and Geohazards Department, Lini Highway, Nambatu Area, Port Vila, P.M.B 9054, Vanuatu;1. State Key Laboratory of Silkworm Genome Biology, Southwest University, 216 Tiansheng Road, Chongqing 400716, P R China;2. College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400716, P R China;3. Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, Chongqing 400716, P R China;4. National Manufacturing Innovation Center of Advanced Dyeing and Finishing Technology, Shanghai 201620, P R China |
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| Abstract: | The present note describes some work related to the modelization of acoustical absorption properties of compressed porous materials. An `equivalent fluid' model with five parameters is used. This prediction technique is validated with some industrial materials being 1-D compressed along their thickness, starting from a felt mat having a given basic weight. The obtained results tend to indicate that an adequate prediction of the decrease in the coefficient of absorption is possible with this method. |
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