On the effect of the bending vibration on the acoustic properties of thin poroelastic plates
Résumé
An experimental study on the effect of bending vibration on the acoustic properties of thin porous plates is presented. Poroelastic plates are tested in a large impedance tube in the lower frequency range. It is shown that bending vibration can be excited by the incident sound and detected by measuring the acoustic impedance of a plate. This effect together with the effect of the flow resistivity on the values of the acoustic impedance of the plate are shown. The data from the large and small impedance tubes illustrate how these effects are reduced with the reduced size of the plate.
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