765 - A fitting method to estimate the air flow resistivity of porous materials
Simon F., Fernandez D., Pfretzschner J.
Abstract
The air flow resistivity can be considered a key quantity to study the acoustic performances of porous materials. In the laboratory the quantities that usual measured are the absorption coefficient or its acoustic impedance in a standing wave tube. Both parameters are related to the air flow resistivity through well tested empirical models. In this work one of these models is used to estimate the air flow resistivity based on absorption coefficient measurements by a fitting inverse method. Some examples are given where the new procedure is used and its applicability range envisaged.
Citation
Simon F.; Fernandez D.; Pfretzschner J.: A fitting method to estimate the air flow resistivity of porous materials, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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