Abstract
With respect to a noise barrier, sound diffraction by a half-plane with a fan-shaped headpiece is calculated. The fan consists of a set of rigid strips of different widths, which form narrow wedge-shaped channels of different lengths. The channels are connected to each other through the inner cylindrical cavity into which the inner open ends of the channels face. The curves representing the degree of sound suppression as a function of the frequency and the angle of incidence of sound waves are calculated. These curves demonstrate the high efficiency of the proposed barrier.
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