KOCHETOVYKH ACOUSTIC BAFFLE Russian patent published in 2008 - IPC E04B1/84 

FIELD: construction; physics.

SUBSTANCE: acoustic baffle contains framework with metal-plated slopes and acoustic panel sections. Sections contain acoustic panels implemented as both noise-reflecting translucent panels and non-translucent noise-absorbing panels. Layout of panels in acoustic baffle may vary in any combination of vertical and horizontal lines. Baffle contains metal-plated slopes, translucent noise-reflecting panels. Framework of acoustic noise-absorbing panel is in the shape of parallelepiped formed by front and rear perforated walls with perforation factor equal to or more than 0.25. Each -shaped wall has side edges. Perforation is represented as slotted perforation aligned as lines of rectangles. Adjoining lines are shifted. There is even number of slots in one line and odd number of slots in the other. Odd lines width b1 ratio to even line width b₂ is in the optimal interval of values b1: b2 = 0.7-0.9, ratio of distance between lines h₁ and h₂ is h₁: h₂ = 2.0.

EFFECT: effective noise absorption due to increase of acoustic reduction factor by increasing noise-absorbing surfaces while keeping baffle dimensions.

3 cl, 6 dwg