ACOUSTIC FINISHING OF PRODUCTION PREMISES Russian patent published in 2014 - IPC E04B1/84 

FIELD: construction.

SUBSTANCE: acoustic wall panel comprises a smooth and a perforated walls, between which there is a layer of sound-absorbing material of complex shape. The layer of the sound-absorbing material represents an alternation of solid sections and hollow sections. Hollow sections are formed by prismatic surfaces. The inner surface of the specified sections has a toothed structure, besides, tops of teeth face inside the prismatic surfaces, at the same time ribs of prismatic surfaces are fixed accordingly on the smooth and perforated walls.

EFFECT: increased efficiency of noise absorption.

5 cl, 4 dwg