SOUND-SUPPRESSING CELL PANEL Russian patent published in 2004 - IPC

FIELD: mechanical engineering.

SUBSTANCE: panel has intermediate layer being in rigid and airproof connection on one side to bases of truncated vertexes of shelves of cell filler, and on other side - to outer facing of panel. On base of truncated vertex of each hollow pyramid-shaped vertex of cell filler an additional aperture is made. Coaxially to two apertures on base of each truncated vertex of cell filler two apertures are made in intermediate layer, connected to two channels made in outer facing wall, directed to intermediate layer, connected to chamber placed between cell filler and intermediate layer. Length of each of two said channels is different from length of other channel for half of length of sound wave subjected to sound suppression. Areas of transversal cross-sections of all apertures and channels are similar, and volume V, m³, of each chamber placed between cell filler and intermediate layer is determined from relation from formula.

EFFECT: higher sound-suppression effectiveness.

4 dwg