KOCHETOVS' ACOUSTIC BAFFLE Russian patent published in 2014 - IPC E04B1/84 

FIELD: machine building.

SUBSTANCE: acoustic baffle comprises a frame with splays from metal sheets and sections of acoustic panels being installed in it. The panels can be both noise reflecting translucent and opaque noise absorbing ones. Each of the opaque noise absorbing acoustic panels is made as rigid and perforated walls, between which the layers of sound reflecting and sound-absorbing materials of different density arranged in two layers are located. The layers of sound reflecting material are of complex profile composed of evenly distributed hollow tetrahedrons. The tetrahedrons are located at rigid and perforated walls. The layers of sound reflecting material are made from heat insulation material. The perforated wall has the following perforation characteristics: hole diameter 3-7 mm, perforation percentage 10-15%. As for the shape the holes can be circular, triangular, square, rectangular or diamond-shaped.

EFFECT: improved efficiency of noise suppression.

3 cl, 3 dwg