The Acoustic Pressure Radiated by a Vibrating Circular Plate within the Fraunhofer Zone of the Three-Wall Corner Region
K. Szemela, W.P. Rdzanek and W.J. Rdzanek
Department of Acoustics, Institute of Physics, University of Rzeszów, T. Rejtana 16A, 35-310 Rzeszów, Poland
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The Neumann boundary value problem has been solved for the region bounded by the three perfect rigid infinite baffles arranged perpendicularly to one another. The harmonically vibrating clamped circular plate embedded in one of the baffles is the sound source. It has been assumed that the amplitude of the plate's transverse vibrations is small to use the linear Kelvin-Voigt theory. The Green function has been applied to obtain the asymptotic formulae describing the distribution of the acoustic pressure within the Fraunhofer zone. The analysis of sound radiation has been performed for some selected surface excitations and for some different plate's locations. The acoustic pressure distribution has been examined including the acoustic attenuation and the internal attenuation of the plate's material.
DOI: 10.12693/APhysPolA.121.A-100
PACS numbers: 43.20.Ks, 43.20.Rz, 43.40.+s, 43.20.-f, 43.20.+g