NOISE ABSORBING ACOUSTIC SANDWICH PANEL (VARIANTS) Russian patent published in 2005 - IPC

FIELD: noise and acoustic wave protection devices, particularly ones adapted to pick up, suppress and absorb and used in building structures to provide normalized acoustic regime, for instance in noise-reduction protective screens arranged along motor roads.

SUBSTANCE: acoustic sandwich panel comprises rear and front walls, noise-absorbing block arranged between the walls. The acoustic panel is also provided with noise current splitters formed of profile with resonating cavity. The noise current splitters are installed from one side of front panel and have inclined plates with horizontal deflectors installed in parallel one to another so that slot-like arresters are formed. Acoustic sandwich-panel is provided with flat module formed of at least one layer of fibrous material having surface density of 100-1500 g/m² and flat acoustic membrane made of at least one layer of sound-transmitting material with surface density of 25-200 g/m². The membrane, noise current splitters and inclined plates with deflectors are mounted in three-dimensional module made at least of two vertical noise current splitters and flat acoustic membrane and inclined plates with deflectors secured to the splitters one after another. Flat and three-dimensional modules are serially mounted from outer side of front panel. Noise absorbing block is fixed relative front and rear panels by adhesive and/or mechanical means.

EFFECT: improved acoustic protection of buildings and building structures along traffic arteries, enhanced ecological situation.

48 cl, 14 dwg