Archives of Acoustics, 17, 3, pp. 413-423, 1992

Acoustic pressure of a freely vibrating circular plate without baffle

L. LENIOWSKA
Department of Physics, Department of Technics, Pedagogical University
Poland

W. RDZANEK
Department of Physics, Department of Technics, Pedagogical University
Poland

Formula for an acoustic pressure of a circular plate under free vibrations without baffle board is derived with the use of oblate spheroidal coordinate system. The result is obtained in terms of a single series of spheroidal function products. The number of terms ensuring a required accuracy can be determined numerically. The field radiated by a plate without baffle is analysed for the first three vibration modes on the basis of their directional characteristics and accounting for various values of an interference parameter h = 2πa/λ.
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Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

References

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