Prediction and Measurements of the Influence of Boundary Conditions in a Standing Wave Tube
| Autor: | Vigran, Tor Erik, Kelders, Luc, Lauriks, Walter, Leclaire, Philippe, Johansen, T.F. |
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| Přispěvatelé: | Legrand, Mathias, Laboratorium voor Akoestiek en Thermische Fysica (LATF), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Institutt for Elektroteknikk |
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Acta Acustica united with Acustica Acta Acustica united with Acustica, Hirzel Verlag, 1997 |
| ISSN: | 1610-1928 1861-9959 |
| Popis: | International audience; The paper concerns a comparison between measurement results of the acoustic absorption coefficient and impedance using two different methods, the standing wave tube (Kundt's tube) and a free field method. The mounting of the sample in the Kundt's tube is known to be very important. In this paper, the effect of the constraints at the tube wall on the absorption coefficient of an elastic porous material is analysed. It will be shown that the effect of the friction offered by the tube wall is to stiffen the material, compared to its behaviour in the free field. Measurement results together with model calculations are presented. The material parameters used in the models have been determined by separate measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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