Archives of Acoustics, 17, 3, pp. 433-438, 1992

The sound power of a circular membrane for axially-symmetric vibrations

W. Rdzanek
Institute of Physics, Higher Pedagogical School, 35-310 Rzeszów, ul. Rejtana 16a
Poland

P. Witkowski
Institute of Physics, Higher Pedagogical School, 35-310 Rzeszów, ul. Rejtana 16a
Poland

This paper gives an analysis of the sound power with regard to the influence of a radiated wave on the vibrations of a membrane. The vibrations of the membrane are forces by time-harmonic external pressure. The source is placed in a rigid plannar baffle and radiates into a lossless and homogeneous gas medium. Distributing a velocity in a series of eigenfunctions, we could transform a motion equation into an algebraic system of linear equations. As the final result of the analysis, a relative real power of self and free vibrations for high frequency was derived using an approximate method. The expressions derived here are very useful and convenient for numerical calculations.
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