Archives of Acoustics, 37, 4, pp. 463–473, 2012

Acoustic Power Radiated by a System of Two Vibrating Circular Membranes Located at the Boundary of Three-Wall Corner Spatial Region

Krzysztof SZEMELA
Department of Acoustics, Institute of Physics, University of Rzeszów

Wojciech P. RDZANEK
Department of Acoustics, Institute of Physics, University of Rzeszów

Witold J. RDZANEK
Department of Acoustics, Institute of Physics, University of Rzeszów

Two vibrating circular membranes radiate acoustic waves into the region bounded by three infinite
baffles arranged perpendicularly to one another. The Neumann boundary value problem has been inves-
tigated in the case when both sources are embedded in the same baffle. The analyzed processes are time
harmonic. The membranes vibrate asymmetrically. External excitations of different surface distributions
and different phases have been applied to the sound sources’ surfaces. The influence of the radiated
acoustic waves on the membranes’ vibrations has been included. The acoustic power of the sound sources
system has been calculated by using a complete eigenfunctions system.
Keywords: three-wall corner region; Green function; Neumann boundary value problem; modal analysis; asymmetric vibrations; vibration of an excited circular membrane; acoustic power; mutual interaction of sound sources
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