Archives of Acoustics, 6, 4, pp. 339-358, 1981

Sound power and radiation efficiency of a circular plate

Stefan Czarnecki
Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

Zbigniew Engel
Institute of Mechanics and Vibroacoustics, Academy of Mining and Metallurgy
Poland

Ryszard Panuszka
Institute of Mechanics and Vibroacoustics, Academy of Mining and Metallurgy
Poland

This paper considers the problem of estimating the sound radiation by vibrating surfaces in the case of a circular plate clamped on the circumference. The aim of this paper is to verify the values of the equivalent surfaces of the plate, which were obtained theoretically, with the experimental values obtained in the free field and reverberant field conditions. The results obtained show that there is a good agreement of results for k,,,,a < 5. For kmna > 5 an increase in the sound radiation of the plate can be observed, which results both from a complex character of the vibration of the plate and from the effect of the acoustic field on the vibra¬tion conditions of the plate.
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