SOUND ABSORBING HONEYCOMB PANEL Russian patent published in 2017 - IPC B32B3/12 B32B3/24 G10K11/16 

FIELD: construction.

SUBSTANCE: sound-absorbing honeycomb panel contains the inner perforated and outer skin layers, located between the honeycomb aggregate layers, consisting of cells. The aggregate honeycomb cells are made polydispersed, in the form of the truncated pyramids, and/or truncated cones, and/or pyramids, and/or cones, located in the fractal packing with alternating sizes, so that all cells have the same "peak-base" orientation and are geometrically similar. The cells similarity coefficients form the decreasing geometric progression with the coefficient of 0.5 and the specified first term 1 for the largest cells. The larger bases or bases of all polydisperse pyramidal and/or conical cells with the same value of the similarity coefficient lie in the same plane. The indicated cell bases with the similarity coefficient of less than or equal to 0.5 lie in the plane of the middle cross sections of larger cells with the doubled value of this similarity coefficient. The larger bases or bases of the largest cells with the similarity coefficient of 1 are attached to the outer layer. The small bases or peaks of all polydisperse cells are attached to the inner perforated layer. The through holes of the inner layer perforation are made in each polydisperse cell, forming its neck.

EFFECT: sound absorption coefficient increase.

4 cl, 3 dwg, 1 ex