This paper describes the vibroacoustic coupling between the structural vibrations and internal sound fields of thin structures. In\r\nthis study, a cylindrical structure with thin end plates is subjected to the harmonic point force at one end plate or both end plates,\r\nand a natural frequency of the end plates is selected as the forcing frequency. The resulting vibroacoustic coupling is then analyzed\r\ntheoretically and experimentally by considering the dynamic behavior of the plates and the acoustic characteristics of the internal\r\nsound field as a function of the cylinder length. The length and phase difference between the plate vibrations, which maximize\r\nthe sound pressure level inside the cavity, are clarified theoretically. The theoretical results are validated experimentally through\r\nan excitation experiment using an experimental apparatus that emulates the analytical model.Moreover, the electricity generation\r\nexperiment verifies that sufficient vibroacoustic coupling can be created for the adopted electricity generating system to be effective\r\nas an electric energy-harvesting device.
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