SANDWICH PANEL Russian patent published in 2013 - IPC B32B3/12 

FIELD: process engineering.

SUBSTANCE: invention relates to aircraft engineering, construction and machine building, particularly, to sandwich panel. Filler is separated in height by a set of screens shifted in staggered order by half the clearances between screen threads. Adjacent screens in sandwich panel can differ in diameter of wires and spacing there between. Note here that spacing between adjacent wires is defined by relationship d/b≤0.9, where d is wire diameter in one screen and b is spacing between wires in another screen.

EFFECT: better noise killing in low frequency band.

3 cl, 1 dwg