Attempts have been made to assess fundamental methods of calculating the effectiveness of acoustic screening in model investigations with sound-absorbing inserts of constant geometry. The model investigations concerned the effectiveness of screening applying a flat screen as functions of distance from the source and coefficient of reverberation of the material filling the screen. In calculating the distribution of the acoustic field behind the screen, the acoustic screen is considered to be a cubicoidal thin vertical plate, infinitely long but of varying height, without taking into account the effect of reflection, diffraction and sound absorption. The present paper presents the results of theoretical calculations as well as experimental results of model investigations in a non-reverberation chamber. Comparison of the results permitted a qualitative assessment of the influence of the kind of material filling the screen. Further model investigations, taking into account sound absorption and diffraction and the coefficients of reflection, may in future allow the verification of the applied theoretical methods, and consequently better agreement of the theoretical and experimental results.
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